Backport the following patches:
cpufreq: change '.set_boost' to act on one policy
cpufreq: CPPC: add SW BOOST support
---
v2: modified return vaule of cpufreq_boost_set_sw() to -EINVAL
---
kernel.spec | 5 +-
...ange-.set_boost-to-act-on-one-policy.patch | 186 ++++++++++++++++++
...48-cpufreq-CPPC-add-SW-BOOST-support.patch | 142 +++++++++++++
series.conf | 2 +
4 files changed, 334 insertions(+), 1 deletion(-)
create mode 100644 patches/0647-cpufreq-change-.set_boost-to-act-on-one-policy.patch
create mode 100644 patches/0648-cpufreq-CPPC-add-SW-BOOST-support.patch
diff --git a/kernel.spec b/kernel.spec
index 21a246f26f45..c6ac5b3f416b 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0246
+Release: %{hulkrelease}.0247
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -850,6 +850,9 @@ fi
%changelog
+* Mon Nov 20 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.3.0.0247
+- Backport cpu turbo patches
+
* Fri Nov 17 2023 Zhou Kaiqi <zhoukaiqi(a)huawei.com> - 4.19.90-2311.3.0.0246
- genirq: Increase the number of IRQ descriptors
- irqchip: gic-v3: Collection table support muti pages
diff --git a/patches/0647-cpufreq-change-.set_boost-to-act-on-one-policy.patch b/patches/0647-cpufreq-change-.set_boost-to-act-on-one-policy.patch
new file mode 100644
index 000000000000..7ca215fc4481
--- /dev/null
+++ b/patches/0647-cpufreq-change-.set_boost-to-act-on-one-policy.patch
@@ -0,0 +1,186 @@
+From a93e5e087b753c9fe954e4a82ae1224ba56732d0 Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:30 +0800
+Subject: [PATCH openEuler-1.0-LTS 1/2] cpufreq: change '.set_boost' to act on
+ one policy
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit cf6fada71543ceea0f6228ffdc0b85778f3f5a6e
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+Macro 'for_each_active_policy()' is defined internally. To avoid some
+cpufreq driver needing this macro to iterate over all the policies in
+'.set_boost' callback, we redefine '.set_boost' to act on only one
+policy and pass the policy as an argument.
+
+'cpufreq_boost_trigger_state()' iterates over all the policies to set
+boost for the system.
+
+This is preparation for adding SW BOOST support for CPPC.
+
+To protect Boost enable/disable by sysfs from CPU online/offline,
+add 'cpu_hotplug_lock' before calling '.set_boost' for each CPU.
+
+Also move the lock from 'set_boost()' to 'store_cpb()' in
+acpi_cpufreq.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject & changelog ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+
+Conflicts:
+ drivers/cpufreq/cpufreq.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/acpi-cpufreq.c | 14 ++++----
+ drivers/cpufreq/cpufreq.c | 58 +++++++++++++++++++---------------
+ include/linux/cpufreq.h | 2 +-
+ 3 files changed, 42 insertions(+), 32 deletions(-)
+
+diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
+index ce0a51849f66..189c7c9e2641 100644
+--- a/drivers/cpufreq/acpi-cpufreq.c
++++ b/drivers/cpufreq/acpi-cpufreq.c
+@@ -147,12 +147,12 @@ static void boost_set_msr_each(void *p_en)
+ boost_set_msr(enable);
+ }
+
+-static int set_boost(int val)
++static int set_boost(struct cpufreq_policy *policy, int val)
+ {
+- get_online_cpus();
+- on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
+- put_online_cpus();
+- pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
++ on_each_cpu_mask(policy->cpus, boost_set_msr_each,
++ (void *)(long)val, 1);
++ pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
++ cpumask_pr_args(policy->cpus), val ? "en" : "dis");
+
+ return 0;
+ }
+@@ -183,7 +183,9 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
+ if (ret || val > 1)
+ return -EINVAL;
+
+- set_boost(val);
++ get_online_cpus();
++ set_boost(policy, val);
++ put_online_cpus();
+
+ return count;
+ }
+diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
+index 99ca9c50a88f..49ed22b45fb7 100644
+--- a/drivers/cpufreq/cpufreq.c
++++ b/drivers/cpufreq/cpufreq.c
+@@ -2347,34 +2347,32 @@ EXPORT_SYMBOL(cpufreq_update_policy);
+ /*********************************************************************
+ * BOOST *
+ *********************************************************************/
+-static int cpufreq_boost_set_sw(int state)
++static int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
+ {
+- struct cpufreq_policy *policy;
+ int ret = -EINVAL;
+
+- for_each_active_policy(policy) {
+- if (!policy->freq_table)
+- continue;
+-
+- ret = cpufreq_frequency_table_cpuinfo(policy,
+- policy->freq_table);
+- if (ret) {
+- pr_err("%s: Policy frequency update failed\n",
+- __func__);
+- break;
+- }
++ if (!policy->freq_table)
++ return -EINVAL;
+
+- down_write(&policy->rwsem);
+- policy->user_policy.max = policy->max;
+- cpufreq_governor_limits(policy);
+- up_write(&policy->rwsem);
++ ret = cpufreq_frequency_table_cpuinfo(policy,
++ policy->freq_table);
++ if (ret) {
++ pr_err("%s: Policy frequency update failed\n",
++ __func__);
++ return ret;
+ }
+
++ down_write(&policy->rwsem);
++ policy->user_policy.max = policy->max;
++ cpufreq_governor_limits(policy);
++ up_write(&policy->rwsem);
++
+ return ret;
+ }
+
+ int cpufreq_boost_trigger_state(int state)
+ {
++ struct cpufreq_policy *policy;
+ unsigned long flags;
+ int ret = 0;
+
+@@ -2385,15 +2383,25 @@ int cpufreq_boost_trigger_state(int state)
+ cpufreq_driver->boost_enabled = state;
+ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+- ret = cpufreq_driver->set_boost(state);
+- if (ret) {
+- write_lock_irqsave(&cpufreq_driver_lock, flags);
+- cpufreq_driver->boost_enabled = !state;
+- write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+-
+- pr_err("%s: Cannot %s BOOST\n",
+- __func__, state ? "enable" : "disable");
++ get_online_cpus();
++ for_each_active_policy(policy) {
++ ret = cpufreq_driver->set_boost(policy, state);
++ if (ret)
++ goto err_reset_state;
+ }
++ put_online_cpus();
++
++ return 0;
++
++err_reset_state:
++ put_online_cpus();
++
++ write_lock_irqsave(&cpufreq_driver_lock, flags);
++ cpufreq_driver->boost_enabled = !state;
++ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
++
++ pr_err("%s: Cannot %s BOOST\n",
++ __func__, state ? "enable" : "disable");
+
+ return ret;
+ }
+diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
+index 3361663144a1..ff6b10552c86 100644
+--- a/include/linux/cpufreq.h
++++ b/include/linux/cpufreq.h
+@@ -334,7 +334,7 @@ struct cpufreq_driver {
+
+ /* platform specific boost support code */
+ bool boost_enabled;
+- int (*set_boost)(int state);
++ int (*set_boost)(struct cpufreq_policy *policy, int state);
+ };
+
+ /* flags */
+--
+2.25.1
+
diff --git a/patches/0648-cpufreq-CPPC-add-SW-BOOST-support.patch b/patches/0648-cpufreq-CPPC-add-SW-BOOST-support.patch
new file mode 100644
index 000000000000..a8dfe4af2621
--- /dev/null
+++ b/patches/0648-cpufreq-CPPC-add-SW-BOOST-support.patch
@@ -0,0 +1,142 @@
+From 5cca93b9a9e4690a8491f6fde455ff0268f1e92a Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:31 +0800
+Subject: [PATCH openEuler-1.0-LTS 2/2] cpufreq: CPPC: add SW BOOST support
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit 54e74df5d76dea824c7c0c9d1b97150bf9b33793
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+To add SW BOOST support for CPPC, we need to get the max frequency of
+boost mode and non-boost mode. ACPI spec 6.2 section 8.4.7.1 describes
+the following two CPC registers.
+
+"Highest performance is the absolute maximum performance an individual
+processor may reach, assuming ideal conditions. This performance level
+may not be sustainable for long durations, and may only be achievable if
+other platform components are in a specific state; for example, it may
+require other processors be in an idle state.
+
+Nominal Performance is the maximum sustained performance level of the
+processor, assuming ideal operating conditions. In absence of an
+external constraint (power, thermal, etc.) this is the performance level
+the platform is expected to be able to maintain continuously. All
+processors are expected to be able to sustain their nominal performance
+state simultaneously."
+
+To add SW BOOST support for CPPC, we can use Highest Performance as the
+max performance in boost mode and Nominal Performance as the max
+performance in non-boost mode. If the Highest Performance is greater
+than the Nominal Performance, we assume SW BOOST is supported.
+
+The current CPPC driver does not support SW BOOST and use 'Highest
+Performance' as the max performance the CPU can achieve. 'Nominal
+Performance' is used to convert 'performance' to 'frequency'. That
+means, if firmware enable boost and provide a value for Highest
+Performance which is greater than Nominal Performance, boost feature is
+enabled by default.
+
+Because SW BOOST is disabled by default, so, after this patch, boost
+feature is disabled by default even if boost is enabled by firmware.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/cppc_cpufreq.c | 35 ++++++++++++++++++++++++++++++++--
+ 1 file changed, 33 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
+index 0a245f1caa95..15cffca10f1a 100644
+--- a/drivers/cpufreq/cppc_cpufreq.c
++++ b/drivers/cpufreq/cppc_cpufreq.c
+@@ -41,6 +41,7 @@
+ * requested etc.
+ */
+ static struct cppc_cpudata **all_cpu_data;
++static bool boost_supported;
+
+ struct cppc_workaround_oem_info {
+ char oem_id[ACPI_OEM_ID_SIZE + 1];
+@@ -314,7 +315,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * Section 8.4.7.1.1.5 of ACPI 6.1 spec)
+ */
+ policy->min = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_nonlinear_perf);
+- policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ /*
+ * Set cpuinfo.min_freq to Lowest to make the full range of performance
+@@ -322,7 +323,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * nonlinear perf
+ */
+ policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_perf);
+- policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu_num);
+ policy->shared_type = cpu->shared_type;
+@@ -347,6 +348,13 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+
+ cpu->cur_policy = policy;
+
++ /*
++ * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
++ * is supported.
++ */
++ if (cpu->perf_caps.highest_perf > cpu->perf_caps.nominal_perf)
++ boost_supported = true;
++
+ /* Set policy->cur to max now. The governors will adjust later. */
+ policy->cur = cppc_cpufreq_perf_to_khz(cpu,
+ cpu->perf_caps.highest_perf);
+@@ -414,6 +422,28 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
+ return cppc_get_rate_from_fbctrs(cpu, fb_ctrs_t0, fb_ctrs_t1);
+ }
+
++static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
++{
++ struct cppc_cpudata *cpudata;
++ int ret;
++
++ if (!boost_supported) {
++ pr_err("BOOST not supported by CPU or firmware\n");
++ return -EINVAL;
++ }
++
++ cpudata = all_cpu_data[policy->cpu];
++ if (state)
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.highest_perf);
++ else
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.nominal_perf);
++ policy->cpuinfo.max_freq = policy->max;
++
++ return 0;
++}
++
+ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .flags = CPUFREQ_CONST_LOOPS,
+ .verify = cppc_verify_policy,
+@@ -421,6 +451,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .get = cppc_cpufreq_get_rate,
+ .init = cppc_cpufreq_cpu_init,
+ .stop_cpu = cppc_cpufreq_stop_cpu,
++ .set_boost = cppc_cpufreq_set_boost,
+ .name = "cppc_cpufreq",
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index 06e45f51800c..9da341a8f57f 100644
--- a/series.conf
+++ b/series.conf
@@ -647,3 +647,5 @@ patches/0643-net-hns3-Fix-ethtool_-Ops-gen_-Improper-modification.patch
patches/0644-net-hns3-Fix-unreasonable-modifications-caused-by-ro.patch
patches/0645-irqchip-gic-v3-Collection-table-support-muti-pages.patch
patches/0646-genirq-Increase-the-number-of-IRQ-descriptors.patch
+patches/0647-cpufreq-change-.set_boost-to-act-on-one-policy.patch
+patches/0648-cpufreq-CPPC-add-SW-BOOST-support.patch
--
2.25.1
2
1
v1 -> v2:
fix typo in series.conf
Backport the following patches:
cpufreq: change '.set_boost' to act on one policy
cpufreq: CPPC: add SW BOOST support
---
kernel.spec | 5 +-
...ange-.set_boost-to-act-on-one-policy.patch | 186 ++++++++++++++++++
...63-cpufreq-CPPC-add-SW-BOOST-support.patch | 142 +++++++++++++
series.conf | 2 +
4 files changed, 334 insertions(+), 1 deletion(-)
create mode 100644 patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
create mode 100644 patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
diff --git a/kernel.spec b/kernel.spec
index 39fc740d35f6..afb398809fbb 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0244
+Release: %{hulkrelease}.0245
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -850,6 +850,9 @@ fi
%changelog
+* Thu Nov 16 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.3.0.0245
+- Backport cpu turbo patches
+
* Wed Nov 15 2023 Luo Shengwei <luoshengwei(a)huawei.com> - 4.19.90-2311.3.0.0244
- !2803 drivers/gmjstcm: fix a dev_err() call in spi tcm device probe
- !2841 drm/qxl: fix UAF on handle creation
diff --git a/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
new file mode 100644
index 000000000000..83a5195807bb
--- /dev/null
+++ b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
@@ -0,0 +1,186 @@
+From a93e5e087b753c9fe954e4a82ae1224ba56732d0 Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:30 +0800
+Subject: [PATCH openEuler-1.0-LTS 1/2] cpufreq: change '.set_boost' to act on
+ one policy
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit cf6fada71543ceea0f6228ffdc0b85778f3f5a6e
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+Macro 'for_each_active_policy()' is defined internally. To avoid some
+cpufreq driver needing this macro to iterate over all the policies in
+'.set_boost' callback, we redefine '.set_boost' to act on only one
+policy and pass the policy as an argument.
+
+'cpufreq_boost_trigger_state()' iterates over all the policies to set
+boost for the system.
+
+This is preparation for adding SW BOOST support for CPPC.
+
+To protect Boost enable/disable by sysfs from CPU online/offline,
+add 'cpu_hotplug_lock' before calling '.set_boost' for each CPU.
+
+Also move the lock from 'set_boost()' to 'store_cpb()' in
+acpi_cpufreq.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject & changelog ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+
+Conflicts:
+ drivers/cpufreq/cpufreq.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/acpi-cpufreq.c | 14 ++++----
+ drivers/cpufreq/cpufreq.c | 58 +++++++++++++++++++---------------
+ include/linux/cpufreq.h | 2 +-
+ 3 files changed, 42 insertions(+), 32 deletions(-)
+
+diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
+index ce0a51849f66..189c7c9e2641 100644
+--- a/drivers/cpufreq/acpi-cpufreq.c
++++ b/drivers/cpufreq/acpi-cpufreq.c
+@@ -147,12 +147,12 @@ static void boost_set_msr_each(void *p_en)
+ boost_set_msr(enable);
+ }
+
+-static int set_boost(int val)
++static int set_boost(struct cpufreq_policy *policy, int val)
+ {
+- get_online_cpus();
+- on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
+- put_online_cpus();
+- pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
++ on_each_cpu_mask(policy->cpus, boost_set_msr_each,
++ (void *)(long)val, 1);
++ pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
++ cpumask_pr_args(policy->cpus), val ? "en" : "dis");
+
+ return 0;
+ }
+@@ -183,7 +183,9 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
+ if (ret || val > 1)
+ return -EINVAL;
+
+- set_boost(val);
++ get_online_cpus();
++ set_boost(policy, val);
++ put_online_cpus();
+
+ return count;
+ }
+diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
+index 99ca9c50a88f..49ed22b45fb7 100644
+--- a/drivers/cpufreq/cpufreq.c
++++ b/drivers/cpufreq/cpufreq.c
+@@ -2347,34 +2347,32 @@ EXPORT_SYMBOL(cpufreq_update_policy);
+ /*********************************************************************
+ * BOOST *
+ *********************************************************************/
+-static int cpufreq_boost_set_sw(int state)
++static int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
+ {
+- struct cpufreq_policy *policy;
+ int ret = -EINVAL;
+
+- for_each_active_policy(policy) {
+- if (!policy->freq_table)
+- continue;
+-
+- ret = cpufreq_frequency_table_cpuinfo(policy,
+- policy->freq_table);
+- if (ret) {
+- pr_err("%s: Policy frequency update failed\n",
+- __func__);
+- break;
+- }
++ if (!policy->freq_table)
++ return -ENXIO;
+
+- down_write(&policy->rwsem);
+- policy->user_policy.max = policy->max;
+- cpufreq_governor_limits(policy);
+- up_write(&policy->rwsem);
++ ret = cpufreq_frequency_table_cpuinfo(policy,
++ policy->freq_table);
++ if (ret) {
++ pr_err("%s: Policy frequency update failed\n",
++ __func__);
++ return ret;
+ }
+
++ down_write(&policy->rwsem);
++ policy->user_policy.max = policy->max;
++ cpufreq_governor_limits(policy);
++ up_write(&policy->rwsem);
++
+ return ret;
+ }
+
+ int cpufreq_boost_trigger_state(int state)
+ {
++ struct cpufreq_policy *policy;
+ unsigned long flags;
+ int ret = 0;
+
+@@ -2385,15 +2383,25 @@ int cpufreq_boost_trigger_state(int state)
+ cpufreq_driver->boost_enabled = state;
+ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+- ret = cpufreq_driver->set_boost(state);
+- if (ret) {
+- write_lock_irqsave(&cpufreq_driver_lock, flags);
+- cpufreq_driver->boost_enabled = !state;
+- write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+-
+- pr_err("%s: Cannot %s BOOST\n",
+- __func__, state ? "enable" : "disable");
++ get_online_cpus();
++ for_each_active_policy(policy) {
++ ret = cpufreq_driver->set_boost(policy, state);
++ if (ret)
++ goto err_reset_state;
+ }
++ put_online_cpus();
++
++ return 0;
++
++err_reset_state:
++ put_online_cpus();
++
++ write_lock_irqsave(&cpufreq_driver_lock, flags);
++ cpufreq_driver->boost_enabled = !state;
++ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
++
++ pr_err("%s: Cannot %s BOOST\n",
++ __func__, state ? "enable" : "disable");
+
+ return ret;
+ }
+diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
+index 3361663144a1..ff6b10552c86 100644
+--- a/include/linux/cpufreq.h
++++ b/include/linux/cpufreq.h
+@@ -334,7 +334,7 @@ struct cpufreq_driver {
+
+ /* platform specific boost support code */
+ bool boost_enabled;
+- int (*set_boost)(int state);
++ int (*set_boost)(struct cpufreq_policy *policy, int state);
+ };
+
+ /* flags */
+--
+2.25.1
+
diff --git a/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
new file mode 100644
index 000000000000..a8dfe4af2621
--- /dev/null
+++ b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
@@ -0,0 +1,142 @@
+From 5cca93b9a9e4690a8491f6fde455ff0268f1e92a Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:31 +0800
+Subject: [PATCH openEuler-1.0-LTS 2/2] cpufreq: CPPC: add SW BOOST support
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit 54e74df5d76dea824c7c0c9d1b97150bf9b33793
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+To add SW BOOST support for CPPC, we need to get the max frequency of
+boost mode and non-boost mode. ACPI spec 6.2 section 8.4.7.1 describes
+the following two CPC registers.
+
+"Highest performance is the absolute maximum performance an individual
+processor may reach, assuming ideal conditions. This performance level
+may not be sustainable for long durations, and may only be achievable if
+other platform components are in a specific state; for example, it may
+require other processors be in an idle state.
+
+Nominal Performance is the maximum sustained performance level of the
+processor, assuming ideal operating conditions. In absence of an
+external constraint (power, thermal, etc.) this is the performance level
+the platform is expected to be able to maintain continuously. All
+processors are expected to be able to sustain their nominal performance
+state simultaneously."
+
+To add SW BOOST support for CPPC, we can use Highest Performance as the
+max performance in boost mode and Nominal Performance as the max
+performance in non-boost mode. If the Highest Performance is greater
+than the Nominal Performance, we assume SW BOOST is supported.
+
+The current CPPC driver does not support SW BOOST and use 'Highest
+Performance' as the max performance the CPU can achieve. 'Nominal
+Performance' is used to convert 'performance' to 'frequency'. That
+means, if firmware enable boost and provide a value for Highest
+Performance which is greater than Nominal Performance, boost feature is
+enabled by default.
+
+Because SW BOOST is disabled by default, so, after this patch, boost
+feature is disabled by default even if boost is enabled by firmware.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/cppc_cpufreq.c | 35 ++++++++++++++++++++++++++++++++--
+ 1 file changed, 33 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
+index 0a245f1caa95..15cffca10f1a 100644
+--- a/drivers/cpufreq/cppc_cpufreq.c
++++ b/drivers/cpufreq/cppc_cpufreq.c
+@@ -41,6 +41,7 @@
+ * requested etc.
+ */
+ static struct cppc_cpudata **all_cpu_data;
++static bool boost_supported;
+
+ struct cppc_workaround_oem_info {
+ char oem_id[ACPI_OEM_ID_SIZE + 1];
+@@ -314,7 +315,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * Section 8.4.7.1.1.5 of ACPI 6.1 spec)
+ */
+ policy->min = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_nonlinear_perf);
+- policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ /*
+ * Set cpuinfo.min_freq to Lowest to make the full range of performance
+@@ -322,7 +323,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * nonlinear perf
+ */
+ policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_perf);
+- policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu_num);
+ policy->shared_type = cpu->shared_type;
+@@ -347,6 +348,13 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+
+ cpu->cur_policy = policy;
+
++ /*
++ * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
++ * is supported.
++ */
++ if (cpu->perf_caps.highest_perf > cpu->perf_caps.nominal_perf)
++ boost_supported = true;
++
+ /* Set policy->cur to max now. The governors will adjust later. */
+ policy->cur = cppc_cpufreq_perf_to_khz(cpu,
+ cpu->perf_caps.highest_perf);
+@@ -414,6 +422,28 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
+ return cppc_get_rate_from_fbctrs(cpu, fb_ctrs_t0, fb_ctrs_t1);
+ }
+
++static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
++{
++ struct cppc_cpudata *cpudata;
++ int ret;
++
++ if (!boost_supported) {
++ pr_err("BOOST not supported by CPU or firmware\n");
++ return -EINVAL;
++ }
++
++ cpudata = all_cpu_data[policy->cpu];
++ if (state)
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.highest_perf);
++ else
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.nominal_perf);
++ policy->cpuinfo.max_freq = policy->max;
++
++ return 0;
++}
++
+ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .flags = CPUFREQ_CONST_LOOPS,
+ .verify = cppc_verify_policy,
+@@ -421,6 +451,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .get = cppc_cpufreq_get_rate,
+ .init = cppc_cpufreq_cpu_init,
+ .stop_cpu = cppc_cpufreq_stop_cpu,
++ .set_boost = cppc_cpufreq_set_boost,
+ .name = "cppc_cpufreq",
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index d78c29dea2e9..89ccb80a37d8 100644
--- a/series.conf
+++ b/series.conf
@@ -362,3 +362,5 @@ patches/0358-spi-hisi-sfc-v3xx-add-address-mode-check.patch
patches/0359-spi-hisi-sfc-v3xx-fix-potential-irq-race-condition.patch
patches/0360-spi-hisi-sfc-v3xx-drop-unnecessary-ACPI_PTR-and-rela.patch
patches/0361-config-arm64-Build-HiSilicon-SPI-SFC-driver-as-modul.patch
+patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
+patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
--
2.25.1
2
1
Backport the following patches:
cpufreq: change '.set_boost' to act on one policy
cpufreq: CPPC: add SW BOOST support
---
kernel.spec | 5 +-
...ange-.set_boost-to-act-on-one-policy.patch | 186 ++++++++++++++++++
...63-cpufreq-CPPC-add-SW-BOOST-support.patch | 142 +++++++++++++
series.conf | 2 +
4 files changed, 334 insertions(+), 1 deletion(-)
create mode 100644 patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
create mode 100644 patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
diff --git a/kernel.spec b/kernel.spec
index 39fc740d35f6..afb398809fbb 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0244
+Release: %{hulkrelease}.0245
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -850,6 +850,9 @@ fi
%changelog
+* Thu Nov 16 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.3.0.0245
+- Backport cpu turbo patches
+
* Wed Nov 15 2023 Luo Shengwei <luoshengwei(a)huawei.com> - 4.19.90-2311.3.0.0244
- !2803 drivers/gmjstcm: fix a dev_err() call in spi tcm device probe
- !2841 drm/qxl: fix UAF on handle creation
diff --git a/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
new file mode 100644
index 000000000000..83a5195807bb
--- /dev/null
+++ b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
@@ -0,0 +1,186 @@
+From a93e5e087b753c9fe954e4a82ae1224ba56732d0 Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:30 +0800
+Subject: [PATCH openEuler-1.0-LTS 1/2] cpufreq: change '.set_boost' to act on
+ one policy
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit cf6fada71543ceea0f6228ffdc0b85778f3f5a6e
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+Macro 'for_each_active_policy()' is defined internally. To avoid some
+cpufreq driver needing this macro to iterate over all the policies in
+'.set_boost' callback, we redefine '.set_boost' to act on only one
+policy and pass the policy as an argument.
+
+'cpufreq_boost_trigger_state()' iterates over all the policies to set
+boost for the system.
+
+This is preparation for adding SW BOOST support for CPPC.
+
+To protect Boost enable/disable by sysfs from CPU online/offline,
+add 'cpu_hotplug_lock' before calling '.set_boost' for each CPU.
+
+Also move the lock from 'set_boost()' to 'store_cpb()' in
+acpi_cpufreq.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject & changelog ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+
+Conflicts:
+ drivers/cpufreq/cpufreq.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/acpi-cpufreq.c | 14 ++++----
+ drivers/cpufreq/cpufreq.c | 58 +++++++++++++++++++---------------
+ include/linux/cpufreq.h | 2 +-
+ 3 files changed, 42 insertions(+), 32 deletions(-)
+
+diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
+index ce0a51849f66..189c7c9e2641 100644
+--- a/drivers/cpufreq/acpi-cpufreq.c
++++ b/drivers/cpufreq/acpi-cpufreq.c
+@@ -147,12 +147,12 @@ static void boost_set_msr_each(void *p_en)
+ boost_set_msr(enable);
+ }
+
+-static int set_boost(int val)
++static int set_boost(struct cpufreq_policy *policy, int val)
+ {
+- get_online_cpus();
+- on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
+- put_online_cpus();
+- pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
++ on_each_cpu_mask(policy->cpus, boost_set_msr_each,
++ (void *)(long)val, 1);
++ pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
++ cpumask_pr_args(policy->cpus), val ? "en" : "dis");
+
+ return 0;
+ }
+@@ -183,7 +183,9 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
+ if (ret || val > 1)
+ return -EINVAL;
+
+- set_boost(val);
++ get_online_cpus();
++ set_boost(policy, val);
++ put_online_cpus();
+
+ return count;
+ }
+diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
+index 99ca9c50a88f..49ed22b45fb7 100644
+--- a/drivers/cpufreq/cpufreq.c
++++ b/drivers/cpufreq/cpufreq.c
+@@ -2347,34 +2347,32 @@ EXPORT_SYMBOL(cpufreq_update_policy);
+ /*********************************************************************
+ * BOOST *
+ *********************************************************************/
+-static int cpufreq_boost_set_sw(int state)
++static int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
+ {
+- struct cpufreq_policy *policy;
+ int ret = -EINVAL;
+
+- for_each_active_policy(policy) {
+- if (!policy->freq_table)
+- continue;
+-
+- ret = cpufreq_frequency_table_cpuinfo(policy,
+- policy->freq_table);
+- if (ret) {
+- pr_err("%s: Policy frequency update failed\n",
+- __func__);
+- break;
+- }
++ if (!policy->freq_table)
++ return -ENXIO;
+
+- down_write(&policy->rwsem);
+- policy->user_policy.max = policy->max;
+- cpufreq_governor_limits(policy);
+- up_write(&policy->rwsem);
++ ret = cpufreq_frequency_table_cpuinfo(policy,
++ policy->freq_table);
++ if (ret) {
++ pr_err("%s: Policy frequency update failed\n",
++ __func__);
++ return ret;
+ }
+
++ down_write(&policy->rwsem);
++ policy->user_policy.max = policy->max;
++ cpufreq_governor_limits(policy);
++ up_write(&policy->rwsem);
++
+ return ret;
+ }
+
+ int cpufreq_boost_trigger_state(int state)
+ {
++ struct cpufreq_policy *policy;
+ unsigned long flags;
+ int ret = 0;
+
+@@ -2385,15 +2383,25 @@ int cpufreq_boost_trigger_state(int state)
+ cpufreq_driver->boost_enabled = state;
+ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+- ret = cpufreq_driver->set_boost(state);
+- if (ret) {
+- write_lock_irqsave(&cpufreq_driver_lock, flags);
+- cpufreq_driver->boost_enabled = !state;
+- write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+-
+- pr_err("%s: Cannot %s BOOST\n",
+- __func__, state ? "enable" : "disable");
++ get_online_cpus();
++ for_each_active_policy(policy) {
++ ret = cpufreq_driver->set_boost(policy, state);
++ if (ret)
++ goto err_reset_state;
+ }
++ put_online_cpus();
++
++ return 0;
++
++err_reset_state:
++ put_online_cpus();
++
++ write_lock_irqsave(&cpufreq_driver_lock, flags);
++ cpufreq_driver->boost_enabled = !state;
++ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
++
++ pr_err("%s: Cannot %s BOOST\n",
++ __func__, state ? "enable" : "disable");
+
+ return ret;
+ }
+diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
+index 3361663144a1..ff6b10552c86 100644
+--- a/include/linux/cpufreq.h
++++ b/include/linux/cpufreq.h
+@@ -334,7 +334,7 @@ struct cpufreq_driver {
+
+ /* platform specific boost support code */
+ bool boost_enabled;
+- int (*set_boost)(int state);
++ int (*set_boost)(struct cpufreq_policy *policy, int state);
+ };
+
+ /* flags */
+--
+2.25.1
+
diff --git a/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
new file mode 100644
index 000000000000..a8dfe4af2621
--- /dev/null
+++ b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
@@ -0,0 +1,142 @@
+From 5cca93b9a9e4690a8491f6fde455ff0268f1e92a Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:31 +0800
+Subject: [PATCH openEuler-1.0-LTS 2/2] cpufreq: CPPC: add SW BOOST support
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit 54e74df5d76dea824c7c0c9d1b97150bf9b33793
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+To add SW BOOST support for CPPC, we need to get the max frequency of
+boost mode and non-boost mode. ACPI spec 6.2 section 8.4.7.1 describes
+the following two CPC registers.
+
+"Highest performance is the absolute maximum performance an individual
+processor may reach, assuming ideal conditions. This performance level
+may not be sustainable for long durations, and may only be achievable if
+other platform components are in a specific state; for example, it may
+require other processors be in an idle state.
+
+Nominal Performance is the maximum sustained performance level of the
+processor, assuming ideal operating conditions. In absence of an
+external constraint (power, thermal, etc.) this is the performance level
+the platform is expected to be able to maintain continuously. All
+processors are expected to be able to sustain their nominal performance
+state simultaneously."
+
+To add SW BOOST support for CPPC, we can use Highest Performance as the
+max performance in boost mode and Nominal Performance as the max
+performance in non-boost mode. If the Highest Performance is greater
+than the Nominal Performance, we assume SW BOOST is supported.
+
+The current CPPC driver does not support SW BOOST and use 'Highest
+Performance' as the max performance the CPU can achieve. 'Nominal
+Performance' is used to convert 'performance' to 'frequency'. That
+means, if firmware enable boost and provide a value for Highest
+Performance which is greater than Nominal Performance, boost feature is
+enabled by default.
+
+Because SW BOOST is disabled by default, so, after this patch, boost
+feature is disabled by default even if boost is enabled by firmware.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/cppc_cpufreq.c | 35 ++++++++++++++++++++++++++++++++--
+ 1 file changed, 33 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
+index 0a245f1caa95..15cffca10f1a 100644
+--- a/drivers/cpufreq/cppc_cpufreq.c
++++ b/drivers/cpufreq/cppc_cpufreq.c
+@@ -41,6 +41,7 @@
+ * requested etc.
+ */
+ static struct cppc_cpudata **all_cpu_data;
++static bool boost_supported;
+
+ struct cppc_workaround_oem_info {
+ char oem_id[ACPI_OEM_ID_SIZE + 1];
+@@ -314,7 +315,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * Section 8.4.7.1.1.5 of ACPI 6.1 spec)
+ */
+ policy->min = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_nonlinear_perf);
+- policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ /*
+ * Set cpuinfo.min_freq to Lowest to make the full range of performance
+@@ -322,7 +323,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * nonlinear perf
+ */
+ policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_perf);
+- policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu_num);
+ policy->shared_type = cpu->shared_type;
+@@ -347,6 +348,13 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+
+ cpu->cur_policy = policy;
+
++ /*
++ * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
++ * is supported.
++ */
++ if (cpu->perf_caps.highest_perf > cpu->perf_caps.nominal_perf)
++ boost_supported = true;
++
+ /* Set policy->cur to max now. The governors will adjust later. */
+ policy->cur = cppc_cpufreq_perf_to_khz(cpu,
+ cpu->perf_caps.highest_perf);
+@@ -414,6 +422,28 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
+ return cppc_get_rate_from_fbctrs(cpu, fb_ctrs_t0, fb_ctrs_t1);
+ }
+
++static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
++{
++ struct cppc_cpudata *cpudata;
++ int ret;
++
++ if (!boost_supported) {
++ pr_err("BOOST not supported by CPU or firmware\n");
++ return -EINVAL;
++ }
++
++ cpudata = all_cpu_data[policy->cpu];
++ if (state)
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.highest_perf);
++ else
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.nominal_perf);
++ policy->cpuinfo.max_freq = policy->max;
++
++ return 0;
++}
++
+ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .flags = CPUFREQ_CONST_LOOPS,
+ .verify = cppc_verify_policy,
+@@ -421,6 +451,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .get = cppc_cpufreq_get_rate,
+ .init = cppc_cpufreq_cpu_init,
+ .stop_cpu = cppc_cpufreq_stop_cpu,
++ .set_boost = cppc_cpufreq_set_boost,
+ .name = "cppc_cpufreq",
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index d78c29dea2e9..35aef9d23d6c 100644
--- a/series.conf
+++ b/series.conf
@@ -362,3 +362,5 @@ patches/0358-spi-hisi-sfc-v3xx-add-address-mode-check.patch
patches/0359-spi-hisi-sfc-v3xx-fix-potential-irq-race-condition.patch
patches/0360-spi-hisi-sfc-v3xx-drop-unnecessary-ACPI_PTR-and-rela.patch
patches/0361-config-arm64-Build-HiSilicon-SPI-SFC-driver-as-modul.patch
+patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
+patches/0363--cpufreq-CPPC-add-SW-BOOST-support.patch
--
2.25.1
2
1
Backport the following patches:
cpufreq: change '.set_boost' to act on one policy
cpufreq: CPPC: add SW BOOST support
---
kernel.spec | 5 +-
...ange-.set_boost-to-act-on-one-policy.patch | 186 ++++++++++++++++++
...63-cpufreq-CPPC-add-SW-BOOST-support.patch | 142 +++++++++++++
series.conf | 2 +
4 files changed, 334 insertions(+), 1 deletion(-)
create mode 100644 patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
create mode 100644 patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
diff --git a/kernel.spec b/kernel.spec
index 39fc740d35f6..afb398809fbb 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0244
+Release: %{hulkrelease}.0245
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -850,6 +850,9 @@ fi
%changelog
+* Thu Nov 16 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.3.0.0245
+- Backport cpu turbo patches
+
* Wed Nov 15 2023 Luo Shengwei <luoshengwei(a)huawei.com> - 4.19.90-2311.3.0.0244
- !2803 drivers/gmjstcm: fix a dev_err() call in spi tcm device probe
- !2841 drm/qxl: fix UAF on handle creation
diff --git a/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
new file mode 100644
index 000000000000..83a5195807bb
--- /dev/null
+++ b/patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
@@ -0,0 +1,186 @@
+From a93e5e087b753c9fe954e4a82ae1224ba56732d0 Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:30 +0800
+Subject: [PATCH openEuler-1.0-LTS 1/2] cpufreq: change '.set_boost' to act on
+ one policy
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit cf6fada71543ceea0f6228ffdc0b85778f3f5a6e
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+Macro 'for_each_active_policy()' is defined internally. To avoid some
+cpufreq driver needing this macro to iterate over all the policies in
+'.set_boost' callback, we redefine '.set_boost' to act on only one
+policy and pass the policy as an argument.
+
+'cpufreq_boost_trigger_state()' iterates over all the policies to set
+boost for the system.
+
+This is preparation for adding SW BOOST support for CPPC.
+
+To protect Boost enable/disable by sysfs from CPU online/offline,
+add 'cpu_hotplug_lock' before calling '.set_boost' for each CPU.
+
+Also move the lock from 'set_boost()' to 'store_cpb()' in
+acpi_cpufreq.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject & changelog ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+
+Conflicts:
+ drivers/cpufreq/cpufreq.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/acpi-cpufreq.c | 14 ++++----
+ drivers/cpufreq/cpufreq.c | 58 +++++++++++++++++++---------------
+ include/linux/cpufreq.h | 2 +-
+ 3 files changed, 42 insertions(+), 32 deletions(-)
+
+diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
+index ce0a51849f66..189c7c9e2641 100644
+--- a/drivers/cpufreq/acpi-cpufreq.c
++++ b/drivers/cpufreq/acpi-cpufreq.c
+@@ -147,12 +147,12 @@ static void boost_set_msr_each(void *p_en)
+ boost_set_msr(enable);
+ }
+
+-static int set_boost(int val)
++static int set_boost(struct cpufreq_policy *policy, int val)
+ {
+- get_online_cpus();
+- on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
+- put_online_cpus();
+- pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
++ on_each_cpu_mask(policy->cpus, boost_set_msr_each,
++ (void *)(long)val, 1);
++ pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
++ cpumask_pr_args(policy->cpus), val ? "en" : "dis");
+
+ return 0;
+ }
+@@ -183,7 +183,9 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
+ if (ret || val > 1)
+ return -EINVAL;
+
+- set_boost(val);
++ get_online_cpus();
++ set_boost(policy, val);
++ put_online_cpus();
+
+ return count;
+ }
+diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
+index 99ca9c50a88f..49ed22b45fb7 100644
+--- a/drivers/cpufreq/cpufreq.c
++++ b/drivers/cpufreq/cpufreq.c
+@@ -2347,34 +2347,32 @@ EXPORT_SYMBOL(cpufreq_update_policy);
+ /*********************************************************************
+ * BOOST *
+ *********************************************************************/
+-static int cpufreq_boost_set_sw(int state)
++static int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
+ {
+- struct cpufreq_policy *policy;
+ int ret = -EINVAL;
+
+- for_each_active_policy(policy) {
+- if (!policy->freq_table)
+- continue;
+-
+- ret = cpufreq_frequency_table_cpuinfo(policy,
+- policy->freq_table);
+- if (ret) {
+- pr_err("%s: Policy frequency update failed\n",
+- __func__);
+- break;
+- }
++ if (!policy->freq_table)
++ return -ENXIO;
+
+- down_write(&policy->rwsem);
+- policy->user_policy.max = policy->max;
+- cpufreq_governor_limits(policy);
+- up_write(&policy->rwsem);
++ ret = cpufreq_frequency_table_cpuinfo(policy,
++ policy->freq_table);
++ if (ret) {
++ pr_err("%s: Policy frequency update failed\n",
++ __func__);
++ return ret;
+ }
+
++ down_write(&policy->rwsem);
++ policy->user_policy.max = policy->max;
++ cpufreq_governor_limits(policy);
++ up_write(&policy->rwsem);
++
+ return ret;
+ }
+
+ int cpufreq_boost_trigger_state(int state)
+ {
++ struct cpufreq_policy *policy;
+ unsigned long flags;
+ int ret = 0;
+
+@@ -2385,15 +2383,25 @@ int cpufreq_boost_trigger_state(int state)
+ cpufreq_driver->boost_enabled = state;
+ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+- ret = cpufreq_driver->set_boost(state);
+- if (ret) {
+- write_lock_irqsave(&cpufreq_driver_lock, flags);
+- cpufreq_driver->boost_enabled = !state;
+- write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+-
+- pr_err("%s: Cannot %s BOOST\n",
+- __func__, state ? "enable" : "disable");
++ get_online_cpus();
++ for_each_active_policy(policy) {
++ ret = cpufreq_driver->set_boost(policy, state);
++ if (ret)
++ goto err_reset_state;
+ }
++ put_online_cpus();
++
++ return 0;
++
++err_reset_state:
++ put_online_cpus();
++
++ write_lock_irqsave(&cpufreq_driver_lock, flags);
++ cpufreq_driver->boost_enabled = !state;
++ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
++
++ pr_err("%s: Cannot %s BOOST\n",
++ __func__, state ? "enable" : "disable");
+
+ return ret;
+ }
+diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
+index 3361663144a1..ff6b10552c86 100644
+--- a/include/linux/cpufreq.h
++++ b/include/linux/cpufreq.h
+@@ -334,7 +334,7 @@ struct cpufreq_driver {
+
+ /* platform specific boost support code */
+ bool boost_enabled;
+- int (*set_boost)(int state);
++ int (*set_boost)(struct cpufreq_policy *policy, int state);
+ };
+
+ /* flags */
+--
+2.25.1
+
diff --git a/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
new file mode 100644
index 000000000000..a8dfe4af2621
--- /dev/null
+++ b/patches/0363-cpufreq-CPPC-add-SW-BOOST-support.patch
@@ -0,0 +1,142 @@
+From 5cca93b9a9e4690a8491f6fde455ff0268f1e92a Mon Sep 17 00:00:00 2001
+From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Date: Sat, 30 May 2020 10:08:31 +0800
+Subject: [PATCH openEuler-1.0-LTS 2/2] cpufreq: CPPC: add SW BOOST support
+
+mainline inclusion
+from mainline-v5.8-rc1
+commit 54e74df5d76dea824c7c0c9d1b97150bf9b33793
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I88RXU
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+To add SW BOOST support for CPPC, we need to get the max frequency of
+boost mode and non-boost mode. ACPI spec 6.2 section 8.4.7.1 describes
+the following two CPC registers.
+
+"Highest performance is the absolute maximum performance an individual
+processor may reach, assuming ideal conditions. This performance level
+may not be sustainable for long durations, and may only be achievable if
+other platform components are in a specific state; for example, it may
+require other processors be in an idle state.
+
+Nominal Performance is the maximum sustained performance level of the
+processor, assuming ideal operating conditions. In absence of an
+external constraint (power, thermal, etc.) this is the performance level
+the platform is expected to be able to maintain continuously. All
+processors are expected to be able to sustain their nominal performance
+state simultaneously."
+
+To add SW BOOST support for CPPC, we can use Highest Performance as the
+max performance in boost mode and Nominal Performance as the max
+performance in non-boost mode. If the Highest Performance is greater
+than the Nominal Performance, we assume SW BOOST is supported.
+
+The current CPPC driver does not support SW BOOST and use 'Highest
+Performance' as the max performance the CPU can achieve. 'Nominal
+Performance' is used to convert 'performance' to 'frequency'. That
+means, if firmware enable boost and provide a value for Highest
+Performance which is greater than Nominal Performance, boost feature is
+enabled by default.
+
+Because SW BOOST is disabled by default, so, after this patch, boost
+feature is disabled by default even if boost is enabled by firmware.
+
+Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com>
+Suggested-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+Acked-by: Viresh Kumar <viresh.kumar(a)linaro.org>
+[ rjw: Subject ]
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/cpufreq/cppc_cpufreq.c | 35 ++++++++++++++++++++++++++++++++--
+ 1 file changed, 33 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
+index 0a245f1caa95..15cffca10f1a 100644
+--- a/drivers/cpufreq/cppc_cpufreq.c
++++ b/drivers/cpufreq/cppc_cpufreq.c
+@@ -41,6 +41,7 @@
+ * requested etc.
+ */
+ static struct cppc_cpudata **all_cpu_data;
++static bool boost_supported;
+
+ struct cppc_workaround_oem_info {
+ char oem_id[ACPI_OEM_ID_SIZE + 1];
+@@ -314,7 +315,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * Section 8.4.7.1.1.5 of ACPI 6.1 spec)
+ */
+ policy->min = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_nonlinear_perf);
+- policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->max = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ /*
+ * Set cpuinfo.min_freq to Lowest to make the full range of performance
+@@ -322,7 +323,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+ * nonlinear perf
+ */
+ policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.lowest_perf);
+- policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.highest_perf);
++ policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu, cpu->perf_caps.nominal_perf);
+
+ policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu_num);
+ policy->shared_type = cpu->shared_type;
+@@ -347,6 +348,13 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
+
+ cpu->cur_policy = policy;
+
++ /*
++ * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
++ * is supported.
++ */
++ if (cpu->perf_caps.highest_perf > cpu->perf_caps.nominal_perf)
++ boost_supported = true;
++
+ /* Set policy->cur to max now. The governors will adjust later. */
+ policy->cur = cppc_cpufreq_perf_to_khz(cpu,
+ cpu->perf_caps.highest_perf);
+@@ -414,6 +422,28 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
+ return cppc_get_rate_from_fbctrs(cpu, fb_ctrs_t0, fb_ctrs_t1);
+ }
+
++static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
++{
++ struct cppc_cpudata *cpudata;
++ int ret;
++
++ if (!boost_supported) {
++ pr_err("BOOST not supported by CPU or firmware\n");
++ return -EINVAL;
++ }
++
++ cpudata = all_cpu_data[policy->cpu];
++ if (state)
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.highest_perf);
++ else
++ policy->max = cppc_cpufreq_perf_to_khz(cpudata,
++ cpudata->perf_caps.nominal_perf);
++ policy->cpuinfo.max_freq = policy->max;
++
++ return 0;
++}
++
+ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .flags = CPUFREQ_CONST_LOOPS,
+ .verify = cppc_verify_policy,
+@@ -421,6 +451,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
+ .get = cppc_cpufreq_get_rate,
+ .init = cppc_cpufreq_cpu_init,
+ .stop_cpu = cppc_cpufreq_stop_cpu,
++ .set_boost = cppc_cpufreq_set_boost,
+ .name = "cppc_cpufreq",
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index d78c29dea2e9..35aef9d23d6c 100644
--- a/series.conf
+++ b/series.conf
@@ -362,3 +362,5 @@ patches/0358-spi-hisi-sfc-v3xx-add-address-mode-check.patch
patches/0359-spi-hisi-sfc-v3xx-fix-potential-irq-race-condition.patch
patches/0360-spi-hisi-sfc-v3xx-drop-unnecessary-ACPI_PTR-and-rela.patch
patches/0361-config-arm64-Build-HiSilicon-SPI-SFC-driver-as-modul.patch
+patches/0362-cpufreq-change-.set_boost-to-act-on-one-policy.patch
+patches/0363--cpufreq-CPPC-add-SW-BOOST-support.patch
--
2.25.1
1
0
Containing the following patches:
ACPI/MPAM: Adapt to Arm's MPAM ACPI table version 2
ACPI / PPTT: Find PPTT processor node by cache id
ACPICA: ACPI 6.4: PPTT: add new version of subtable type 1
ACPICA: Add support for Arm's MPAM ACPI table version 2
---
kernel.spec | 6 +-
...rt-for-Arm-s-MPAM-ACPI-table-version.patch | 166 ++++++++++
...PPTT-add-new-version-of-subtable-typ.patch | 65 ++++
...Find-PPTT-processor-node-by-cache-id.patch | 114 +++++++
...t-to-Arm-s-MPAM-ACPI-table-version-2.patch | 302 ++++++++++++++++++
series.conf | 4 +
6 files changed, 656 insertions(+), 1 deletion(-)
create mode 100644 patches/0118-ACPICA-Add-support-for-Arm-s-MPAM-ACPI-table-version.patch
create mode 100644 patches/0119-ACPICA-ACPI-6.4-PPTT-add-new-version-of-subtable-typ.patch
create mode 100644 patches/0120-ACPI-PPTT-Find-PPTT-processor-node-by-cache-id.patch
create mode 100644 patches/0121-ACPI-MPAM-Adapt-to-Arm-s-MPAM-ACPI-table-version-2.patch
diff --git a/kernel.spec b/kernel.spec
index c359e305adcb..31c70083ef82 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0238
+Release: %{hulkrelease}.0239
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -836,6 +836,10 @@ fi
%endif
%changelog
+
+* Fri Nov 10 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.1.0.0239
+- mpam: support ACPI for MPAM 2.0
+
* Thu Nov 9 2023 Kunkun Jiang <jiangkunkun(a)huawei.com> - 4.19.90-2311.1.0.0238
- scsi: virtio_scsi: limit number of hw queues by nr_cpu_ids
diff --git a/patches/0118-ACPICA-Add-support-for-Arm-s-MPAM-ACPI-table-version.patch b/patches/0118-ACPICA-Add-support-for-Arm-s-MPAM-ACPI-table-version.patch
new file mode 100644
index 000000000000..9986d73ca082
--- /dev/null
+++ b/patches/0118-ACPICA-Add-support-for-Arm-s-MPAM-ACPI-table-version.patch
@@ -0,0 +1,166 @@
+From fbd9895d29825eeea4d958e41a9974534baa8a6c Mon Sep 17 00:00:00 2001
+From: Hesham Almatary <hesham.almatary(a)huawei.com>
+Date: Fri, 9 Jun 2023 13:06:49 +0800
+Subject: [PATCH openEuler-20.03-LTS-SP4 1/4] ACPICA: Add support for Arm's MPAM ACPI
+ table version 2
+
+mainline inclusion
+from mainline-v6.4-rc1
+commit 47920aae34e295f4ffbeac0b10698ceda52eec99
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I77UDW
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+ACPICA commit 005e24bcaa6e4c7db327b4f81fb63b2715aac7e6
+
+Complies with ACPI for Memory System Resource Partitioning and
+Monitoring 2.0 [1]. Document number: DEN0065, as of December 2022.
+
+Support for all types of MPAM resources. No support yet for:
+1) MPAM PCC Interface Type
+2) The optional Resource-specific data per MSC node, introduced in v2 of the
+MPAM ACPI spec.
+
+[1] https://developer.arm.com/documentation/den0065/latest
+
+Link: https://github.com/acpica/acpica/commit/005e24bc
+Signed-off-by: Hesham Almatary <hesham.almatary(a)huawei.com>
+Signed-off-by: Bob Moore <robert.moore(a)intel.com>
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+
+Conflicts:
+ include/acpi/actbl2.h
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ include/acpi/actbl2.h | 111 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 111 insertions(+)
+
+diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
+index 476d0f6188c6..38325bd24231 100644
+--- a/include/acpi/actbl2.h
++++ b/include/acpi/actbl2.h
+@@ -964,6 +964,117 @@ struct acpi_mpam_node_memory {
+ u8 reserved1[3];
+ };
+
++/*******************************************************************************
++ *
++ * MPAM - Memory System Resource Partitioning and Monitoring
++ *
++ * Conforms to "ACPI for Memory System Resource Partitioning and Monitoring 2.0"
++ * Document number: ARM DEN 0065, December, 2022.
++ *
++ ******************************************************************************/
++
++/* MPAM RIS locator types. Table 11, Location types */
++enum acpi_mpam_locator_type {
++ ACPI_MPAM_LOCATION_TYPE_PROCESSOR_CACHE = 0,
++ ACPI_MPAM_LOCATION_TYPE_MEMORY = 1,
++ ACPI_MPAM_LOCATION_TYPE_SMMU = 2,
++ ACPI_MPAM_LOCATION_TYPE_MEMORY_CACHE = 3,
++ ACPI_MPAM_LOCATION_TYPE_ACPI_DEVICE = 4,
++ ACPI_MPAM_LOCATION_TYPE_INTERCONNECT = 5,
++ ACPI_MPAM_LOCATION_TYPE_UNKNOWN = 0xFF
++};
++
++/* MPAM Functional dependency descriptor. Table 10 */
++struct acpi_mpam_func_deps {
++ u32 producer;
++ u32 reserved;
++};
++
++/* MPAM Processor cache locator descriptor. Table 13 */
++struct acpi_mpam_resource_cache_locator {
++ u64 cache_reference;
++ u32 reserved;
++};
++
++/* MPAM Memory locator descriptor. Table 14 */
++struct acpi_mpam_resource_memory_locator {
++ u64 proximity_domain;
++ u32 reserved;
++};
++
++/* MPAM SMMU locator descriptor. Table 15 */
++struct acpi_mpam_resource_smmu_locator {
++ u64 smmu_interface;
++ u32 reserved;
++};
++
++/* MPAM Memory-side cache locator descriptor. Table 16 */
++struct acpi_mpam_resource_memcache_locator {
++ u8 reserved[7];
++ u8 level;
++ u32 reference;
++};
++
++/* MPAM ACPI device locator descriptor. Table 17 */
++struct acpi_mpam_resource_acpi_locator {
++ u64 acpi_hw_id;
++ u32 acpi_unique_id;
++};
++
++/* MPAM Interconnect locator descriptor. Table 18 */
++struct acpi_mpam_resource_interconnect_locator {
++ u64 inter_connect_desc_tbl_off;
++ u32 reserved;
++};
++
++/* MPAM Locator structure. Table 12 */
++struct acpi_mpam_resource_generic_locator {
++ u64 descriptor1;
++ u32 descriptor2;
++};
++
++union acpi_mpam_resource_locator {
++ struct acpi_mpam_resource_cache_locator cache_locator;
++ struct acpi_mpam_resource_memory_locator memory_locator;
++ struct acpi_mpam_resource_smmu_locator smmu_locator;
++ struct acpi_mpam_resource_memcache_locator mem_cache_locator;
++ struct acpi_mpam_resource_acpi_locator acpi_locator;
++ struct acpi_mpam_resource_interconnect_locator interconnect_ifc_locator;
++ struct acpi_mpam_resource_generic_locator generic_locator;
++};
++
++/* Memory System Component Resource Node Structure Table 9 */
++struct acpi_mpam_resource_node {
++ u32 identifier;
++ u8 ris_index;
++ u16 reserved1;
++ u8 locator_type;
++ union acpi_mpam_resource_locator locator;
++ u32 num_functional_deps;
++};
++
++/* Memory System Component (MSC) Node Structure. Table 4 */
++struct acpi_mpam_msc_node {
++ u16 length;
++ u8 interface_type;
++ u8 reserved;
++ u32 identifier;
++ u64 base_address;
++ u32 mmio_size;
++ u32 overflow_interrupt;
++ u32 overflow_interrupt_flags;
++ u32 reserved1;
++ u32 overflow_interrupt_affinity;
++ u32 error_interrupt;
++ u32 error_interrupt_flags;
++ u32 reserved2;
++ u32 error_interrupt_affinity;
++ u32 max_nrdy_usec;
++ u64 hardware_id_linked_device;
++ u32 instance_id_linked_device;
++ u32 num_resouce_nodes;
++};
++
+ /*******************************************************************************
+ *
+ * MSDM - Microsoft Data Management table
+--
+2.25.1
+
diff --git a/patches/0119-ACPICA-ACPI-6.4-PPTT-add-new-version-of-subtable-typ.patch b/patches/0119-ACPICA-ACPI-6.4-PPTT-add-new-version-of-subtable-typ.patch
new file mode 100644
index 000000000000..e5b6f51c5892
--- /dev/null
+++ b/patches/0119-ACPICA-ACPI-6.4-PPTT-add-new-version-of-subtable-typ.patch
@@ -0,0 +1,65 @@
+From 3cab8977d9a1456204cc629bbae1572c583a91fb Mon Sep 17 00:00:00 2001
+From: Erik Kaneda <erik.kaneda(a)intel.com>
+Date: Fri, 9 Jun 2023 13:06:50 +0800
+Subject: [PATCH openEuler-20.03-LTS-SP4 2/4] ACPICA: ACPI 6.4: PPTT: add new version
+ of subtable type 1
+
+mainline inclusion
+from mainline-v5.13-rc1
+commit 5e2e86c0b9970e6f70869e76a1c6417036fd3a7e
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I77UDW
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+This commit squashes the following:
+
+ACPICA commit 475c5e89f8f701ccdfee6ca567e33c854ecd6c9e
+ACPICA commit 82cf78ac175a4b7d8842c5b786be24031c817cfd
+
+This new subtable is only valid for PPTT version 3.
+
+Elyes fixed a misspelled identifier in this commit.
+
+Link: https://github.com/acpica/acpica/commit/475c5e89
+Link: https://github.com/acpica/acpica/commit/82cf78ac
+Signed-off-by: Elyes HAOUAS <ehaouas(a)noos.fr>
+Signed-off-by: Erik Kaneda <erik.kaneda(a)intel.com>
+Signed-off-by: Bob Moore <robert.moore(a)intel.com>
+Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ include/acpi/actbl2.h | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
+index 38325bd24231..d95852c1708f 100644
+--- a/include/acpi/actbl2.h
++++ b/include/acpi/actbl2.h
+@@ -1664,6 +1664,12 @@ struct acpi_pptt_cache {
+ u16 line_size;
+ };
+
++/* 1: Cache Type Structure for PPTT version 3 */
++
++struct acpi_pptt_cache_v1 {
++ u32 cache_id;
++};
++
+ /* Flags */
+
+ #define ACPI_PPTT_SIZE_PROPERTY_VALID (1) /* Physical property valid */
+@@ -1673,6 +1679,7 @@ struct acpi_pptt_cache {
+ #define ACPI_PPTT_CACHE_TYPE_VALID (1<<4) /* Cache type valid */
+ #define ACPI_PPTT_WRITE_POLICY_VALID (1<<5) /* Write policy valid */
+ #define ACPI_PPTT_LINE_SIZE_VALID (1<<6) /* Line size valid */
++#define ACPI_PPTT_CACHE_ID_VALID (1<<7) /* Cache ID valid */
+
+ /* Masks for Attributes */
+
+--
+2.25.1
+
diff --git a/patches/0120-ACPI-PPTT-Find-PPTT-processor-node-by-cache-id.patch b/patches/0120-ACPI-PPTT-Find-PPTT-processor-node-by-cache-id.patch
new file mode 100644
index 000000000000..7c8b81358dd8
--- /dev/null
+++ b/patches/0120-ACPI-PPTT-Find-PPTT-processor-node-by-cache-id.patch
@@ -0,0 +1,114 @@
+From c76f178feff20fcbda0dba4a72418f310d65f61b Mon Sep 17 00:00:00 2001
+From: Yu Liao <liaoyu15(a)huawei.com>
+Date: Fri, 9 Jun 2023 13:06:51 +0800
+Subject: [PATCH openEuler-20.03-LTS-SP4 3/4] ACPI / PPTT: Find PPTT processor node
+ by cache id
+
+openeuler inclusion
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I77UDW
+CVE: NA
+
+--------------------------------
+
+The MPAM table identifies caches by id, but the driver also wants to know
+the processor node.
+
+Add a helper that walks every possible cache, until it finds the one
+identified by id, then return processor node.
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ drivers/acpi/pptt.c | 55 ++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/acpi.h | 5 ++++
+ 2 files changed, 60 insertions(+)
+
+diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
+index 879b9155b7b4..74ce9fcee830 100644
+--- a/drivers/acpi/pptt.c
++++ b/drivers/acpi/pptt.c
+@@ -896,3 +896,58 @@ int find_acpi_cpu_topology_hetero_id(unsigned int cpu)
+ return find_acpi_cpu_topology_tag(cpu, PPTT_ABORT_PACKAGE,
+ ACPI_PPTT_ACPI_IDENTICAL);
+ }
++
++struct acpi_pptt_processor *find_acpi_processor_node_from_cache_id(u32 cache_id)
++{
++ u32 acpi_cpu_id;
++ acpi_status status;
++ int level, cpu, num_levels;
++ struct acpi_pptt_cache *cache;
++ struct acpi_table_header *table;
++ struct acpi_pptt_cache_v1 *cache_v1;
++ struct acpi_pptt_processor *cpu_node;
++
++ status = acpi_get_table(ACPI_SIG_PPTT, 0, &table);
++ if (ACPI_FAILURE(status)) {
++ pr_warn_once("No PPTT table found, cache topology may be inaccurate\n");
++ return NULL;
++ }
++
++ if (table->revision < 3) {
++ acpi_put_table(table);
++ return NULL;
++ }
++
++ /*
++ * If we found the cache first, we'd still need to walk from each CPU
++ * to find the level...
++ */
++ for_each_possible_cpu(cpu) {
++ acpi_cpu_id = get_acpi_id_for_cpu(cpu);
++ cpu_node = acpi_find_processor_node(table, acpi_cpu_id);
++ if (!cpu_node)
++ break;
++ num_levels = acpi_count_levels(table, cpu_node);
++
++ for (level = 0; level <= num_levels; level++) {
++ cache = acpi_find_cache_node(table, acpi_cpu_id,
++ ACPI_PPTT_CACHE_TYPE_UNIFIED,
++ level, &cpu_node);
++ if (!cache)
++ continue;
++
++ cache_v1 = ACPI_ADD_PTR(struct acpi_pptt_cache_v1,
++ cache,
++ sizeof(struct acpi_pptt_cache));
++
++ if (cache->flags & ACPI_PPTT_CACHE_ID_VALID &&
++ cache_v1->cache_id == cache_id) {
++ acpi_put_table(table);
++ return cpu_node;
++ }
++ }
++ }
++
++ acpi_put_table(table);
++ return NULL;
++}
+diff --git a/include/linux/acpi.h b/include/linux/acpi.h
+index 4a0142276cb8..3669c2ff26ed 100644
+--- a/include/linux/acpi.h
++++ b/include/linux/acpi.h
+@@ -1331,6 +1331,7 @@ int find_acpi_cpu_topology(unsigned int cpu, int level);
+ int find_acpi_cpu_topology_package(unsigned int cpu);
+ int find_acpi_cpu_topology_hetero_id(unsigned int cpu);
+ int find_acpi_cpu_cache_topology(unsigned int cpu, int level);
++struct acpi_pptt_processor *find_acpi_processor_node_from_cache_id(u32 cache_id);
+ #else
+ static inline int acpi_pptt_cpu_is_thread(unsigned int cpu)
+ {
+@@ -1352,6 +1353,10 @@ static inline int find_acpi_cpu_cache_topology(unsigned int cpu, int level)
+ {
+ return -EINVAL;
+ }
++static inline struct acpi_pptt_processor *find_acpi_processor_node_from_cache_id(u32 cache_id)
++{
++ return NULL;
++}
+ #endif
+
+ struct acpi_pptt_processor *
+--
+2.25.1
+
diff --git a/patches/0121-ACPI-MPAM-Adapt-to-Arm-s-MPAM-ACPI-table-version-2.patch b/patches/0121-ACPI-MPAM-Adapt-to-Arm-s-MPAM-ACPI-table-version-2.patch
new file mode 100644
index 000000000000..ff649474e1f0
--- /dev/null
+++ b/patches/0121-ACPI-MPAM-Adapt-to-Arm-s-MPAM-ACPI-table-version-2.patch
@@ -0,0 +1,302 @@
+From c366e5ecb88cf89495a82a26274e682fb45631ab Mon Sep 17 00:00:00 2001
+From: Yu Liao <liaoyu15(a)huawei.com>
+Date: Fri, 9 Jun 2023 13:06:52 +0800
+Subject: [PATCH openEuler-20.03-LTS-SP4 4/4] ACPI/MPAM: Adapt to Arm's MPAM ACPI
+ table version 2
+
+openeuler inclusion
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I77UDW
+CVE: NA
+
+--------------------------------
+
+Support ACPI for MPAM 2.0 [1]. Compatible with MPAM ACPI 1.0 by reading
+ACPI revision.
+
+[1] https://developer.arm.com/documentation/den0065/latest
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/mpam/mpam_device.c | 2 +-
+ drivers/acpi/arm64/Makefile | 2 +-
+ drivers/acpi/arm64/mpam.c | 21 +++-
+ drivers/acpi/arm64/mpam_v2.c | 175 +++++++++++++++++++++++++++
+ include/linux/arm_mpam.h | 2 +-
+ 5 files changed, 195 insertions(+), 7 deletions(-)
+ create mode 100644 drivers/acpi/arm64/mpam_v2.c
+
+diff --git a/arch/arm64/kernel/mpam/mpam_device.c b/arch/arm64/kernel/mpam/mpam_device.c
+index b77cea2673c0..1003716efc09 100644
+--- a/arch/arm64/kernel/mpam/mpam_device.c
++++ b/arch/arm64/kernel/mpam/mpam_device.c
+@@ -1873,7 +1873,7 @@ static int __init arm_mpam_driver_init(void)
+ if (acpi_disabled)
+ return platform_driver_register(&arm_mpam_driver);
+ else
+- return acpi_mpam_parse();
++ return acpi_mpam_parse_version();
+ }
+
+ /*
+diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile
+index 81408ce40506..4ba0486dac6b 100644
+--- a/drivers/acpi/arm64/Makefile
++++ b/drivers/acpi/arm64/Makefile
+@@ -1,3 +1,3 @@
+ obj-$(CONFIG_ACPI_IORT) += iort.o
+ obj-$(CONFIG_ACPI_GTDT) += gtdt.o
+-obj-$(CONFIG_ACPI_MPAM) += mpam.o
++obj-$(CONFIG_ACPI_MPAM) += mpam.o mpam_v2.o
+diff --git a/drivers/acpi/arm64/mpam.c b/drivers/acpi/arm64/mpam.c
+index 6f4572193eb2..7b92cab79cf1 100644
+--- a/drivers/acpi/arm64/mpam.c
++++ b/drivers/acpi/arm64/mpam.c
+@@ -32,6 +32,8 @@
+ #include <linux/nodemask.h>
+ #include <linux/arm_mpam.h>
+
++extern int __init acpi_mpam_parse_table_v2(struct acpi_table_header *table,
++ struct acpi_table_header *pptt);
+ /**
+ * acpi_mpam_label_cache_component_id() - Recursivly find @min_physid
+ * for all leaf CPUs below @cpu_node, use numa node id of @min_cpu_node
+@@ -40,7 +42,7 @@
+ * @cpu_node: The point in the toplogy to start the walk
+ * @component_id: The id labels the structure mpam_node cache
+ */
+-static int
++int
+ acpi_mpam_label_cache_component_id(struct acpi_table_header *table_hdr,
+ struct acpi_pptt_processor *cpu_node,
+ u32 *component_id)
+@@ -213,11 +215,11 @@ static int __init acpi_mpam_parse_table(struct acpi_table_header *table,
+ return ret;
+ }
+
+-int __init acpi_mpam_parse(void)
++int __init acpi_mpam_parse_version(void)
+ {
+ struct acpi_table_header *mpam, *pptt;
+ acpi_status status;
+- int ret;
++ int ret = -EINVAL;
+
+ if (!cpus_have_const_cap(ARM64_HAS_MPAM))
+ return 0;
+@@ -234,7 +236,18 @@ int __init acpi_mpam_parse(void)
+ if (ACPI_FAILURE(status))
+ pptt = NULL;
+
+- ret = acpi_mpam_parse_table(mpam, pptt);
++ /*
++ * The BIOS of Kunpeng 920 supports MPAM ACPI 1.0, but the ACPI
++ * revision is wrongly written as 1, so distinguished by
++ * oem_table_id here.
++ */
++ if (mpam->revision == 0 || strncmp(mpam->oem_table_id, "HIP08", 5) == 0)
++ ret = acpi_mpam_parse_table(mpam, pptt);
++ else if (mpam->revision == 1)
++ ret = acpi_mpam_parse_table_v2(mpam, pptt);
++ else
++ pr_err("unsupported MPAM ACPI version: %u\n", mpam->revision);
++
+ acpi_put_table(pptt);
+ acpi_put_table(mpam);
+
+diff --git a/drivers/acpi/arm64/mpam_v2.c b/drivers/acpi/arm64/mpam_v2.c
+new file mode 100644
+index 000000000000..a3888a5da695
+--- /dev/null
++++ b/drivers/acpi/arm64/mpam_v2.c
+@@ -0,0 +1,175 @@
++// SPDX-License-Identifier: GPL-2.0+
++/*
++ * Common code for ARM v8 MPAM ACPI 2.0
++ *
++ * Copyright (C) 2019-2022 Huawei Technologies Co., Ltd
++ *
++ * Author: Yu Liao <liaoyu15(a)huawei.com>
++ *
++ * Code was partially borrowed from http://www.linux-arm.org/git?p=
++ * linux-jm.git;a=commit;h=10fe7d6363ae96b25f584d4a91f9d0f2fd5faf3b.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms and conditions of the GNU General Public License,
++ * version 2, as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope it will be useful, but WITHOUT
++ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
++ * more details.
++ *
++ */
++
++/* Parse the MPAM ACPI table feeding the discovered nodes into the driver */
++#define pr_fmt(fmt) "ACPI MPAM: " fmt
++
++#include <linux/acpi.h>
++#include <acpi/processor.h>
++#include <linux/cpu.h>
++#include <linux/cpumask.h>
++#include <linux/cacheinfo.h>
++#include <linux/string.h>
++#include <linux/nodemask.h>
++#include <linux/arm_mpam.h>
++
++extern int
++acpi_mpam_label_cache_component_id(struct acpi_table_header *table_hdr,
++ struct acpi_pptt_processor *cpu_node,
++ u32 *component_id);
++
++static int __init acpi_mpam_parse_cache_v2(struct acpi_mpam_msc_node *msc,
++ struct acpi_table_header *pptt)
++{
++ int ret = 0;
++ int level;
++ u32 component_id;
++ struct mpam_device *dev;
++ struct cacheinfo *ci;
++ struct acpi_pptt_processor *pptt_cpu_node;
++ struct acpi_mpam_resource_node *resources;
++
++ resources = (struct acpi_mpam_resource_node *)(msc + 1);
++
++ pptt_cpu_node = find_acpi_processor_node_from_cache_id(resources->locator.cache_locator.cache_reference);
++ if (!pptt_cpu_node) {
++ pr_err("Failed to find processor cpu node\n");
++ return -EINVAL;
++ }
++
++ ret = acpi_mpam_label_cache_component_id(pptt, pptt_cpu_node,
++ &component_id);
++ if (ret) {
++ pr_err("Failed to label cache component id\n");
++ return -EINVAL;
++ }
++
++ cpus_read_lock();
++ ci = cacheinfo_shared_cpu_map_search(pptt_cpu_node);
++ if (!ci) {
++ pr_err_once("No CPU has cache with PPTT reference %#llx",
++ resources->locator.cache_locator.cache_reference);
++ pr_err_once("All CPUs must be online to probe mpam.\n");
++ cpus_read_unlock();
++ return -ENODEV;
++ }
++
++ level = ci->level;
++ ci = NULL;
++ cpus_read_unlock();
++
++ /*
++ * Possible we can get cpu-affinity in next MPAM ACPI version,
++ * now we have to set it to NULL and use default possible_aff-
++ * inity.
++ */
++ dev = mpam_device_create_cache(level, component_id, NULL,
++ msc->base_address);
++ if (IS_ERR(dev)) {
++ pr_err("Failed to create cache node\n");
++ return -EINVAL;
++ }
++
++ return mpam_register_device_irq(dev,
++ msc->overflow_interrupt, msc->overflow_interrupt_flags,
++ msc->error_interrupt, msc->error_interrupt_flags);
++}
++
++static int __init acpi_mpam_parse_memory_v2(struct acpi_mpam_msc_node *msc)
++{
++ u32 component_id;
++ struct mpam_device *dev;
++ struct acpi_mpam_resource_node *resources;
++
++ resources = (struct acpi_mpam_resource_node *)(msc + 1);
++
++ component_id = acpi_map_pxm_to_node(resources->locator.memory_locator.proximity_domain);
++ if (component_id == NUMA_NO_NODE)
++ component_id = 0;
++
++ dev = mpam_device_create_memory(component_id, msc->base_address);
++ if (IS_ERR(dev)) {
++ pr_err("Failed to create memory node\n");
++ return -EINVAL;
++ }
++
++ return mpam_register_device_irq(dev,
++ msc->overflow_interrupt, msc->overflow_interrupt_flags,
++ msc->error_interrupt, msc->error_interrupt_flags);
++}
++
++int __init acpi_mpam_parse_table_v2(struct acpi_table_header *table,
++ struct acpi_table_header *pptt)
++{
++ char *table_offset = (char *)(table + 1);
++ char *table_end = (char *)table + table->length;
++ struct acpi_mpam_msc_node *node_hdr;
++ struct acpi_mpam_resource_node *resources;
++ int ret = 0;
++
++ ret = mpam_discovery_start();
++
++ if (ret)
++ return ret;
++
++ node_hdr = (struct acpi_mpam_msc_node *)table_offset;
++ resources = (struct acpi_mpam_resource_node *)(node_hdr + 1);
++
++ while (table_offset < table_end) {
++ switch (resources->locator_type) {
++
++ case ACPI_MPAM_LOCATION_TYPE_PROCESSOR_CACHE:
++ ret = acpi_mpam_parse_cache_v2(node_hdr, pptt);
++ break;
++ case ACPI_MPAM_LOCATION_TYPE_MEMORY:
++ ret = acpi_mpam_parse_memory_v2(node_hdr);
++ break;
++ default:
++ pr_warn_once("Unknown node type %u offset %ld.",
++ (resources->locator_type),
++ (table_offset-(char *)table));
++ /* fall through */
++ case ACPI_MPAM_LOCATION_TYPE_SMMU:
++ /* not yet supported */
++ /* fall through */
++ case ACPI_MPAM_TYPE_UNKNOWN:
++ break;
++ }
++ if (ret)
++ break;
++
++ table_offset += node_hdr->length;
++ node_hdr = (struct acpi_mpam_msc_node *)table_offset;
++ resources = (struct acpi_mpam_resource_node *)(node_hdr + 1);
++ }
++
++ if (ret) {
++ pr_err("discovery failed: %d\n", ret);
++ mpam_discovery_failed();
++ } else {
++ ret = mpam_discovery_complete();
++ if (!ret)
++ pr_info("Successfully init mpam by ACPI.\n");
++ }
++
++ return ret;
++}
+diff --git a/include/linux/arm_mpam.h b/include/linux/arm_mpam.h
+index eed95ba06a5d..9bdca6cd3cc9 100644
+--- a/include/linux/arm_mpam.h
++++ b/include/linux/arm_mpam.h
+@@ -116,6 +116,6 @@ static inline int mpam_register_device_irq(struct mpam_device *dev,
+ return ret;
+ }
+
+-int __init acpi_mpam_parse(void);
++int __init acpi_mpam_parse_version(void);
+
+ #endif
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index 44b2f1866829..244389e3d2da 100644
--- a/series.conf
+++ b/series.conf
@@ -118,3 +118,7 @@ patches/0114-perf-auxtrace-arm64-Add-support-for-HiSilicon-PCIe-T.patch
patches/0115-perf-auxtrace-arm64-Add-support-for-parsing-HiSilico.patch
patches/0116-Fix-the-header-file-location-error-and-adjust-the-fu.patch
patches/0117-scsi-virtio_scsi-limit-number-of-hw-queues-by-nr_cpu.patch
+patches/0118-ACPICA-Add-support-for-Arm-s-MPAM-ACPI-table-version.patch
+patches/0119-ACPICA-ACPI-6.4-PPTT-add-new-version-of-subtable-typ.patch
+patches/0120-ACPI-PPTT-Find-PPTT-processor-node-by-cache-id.patch
+patches/0121-ACPI-MPAM-Adapt-to-Arm-s-MPAM-ACPI-table-version-2.patch
--
2.25.1
2
1
[PATCH openEuler-20.03-LTS-SP4] kernel.spec skip check patches that from linux master or stable
by Yu Liao 08 Nov '23
by Yu Liao 08 Nov '23
08 Nov '23
---
kernel.spec | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/kernel.spec b/kernel.spec
index 21c0951a3151..5f736aaa7464 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0235
+Release: %{hulkrelease}.0236
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -247,6 +247,10 @@ Checkpatches() {
set +e
while read patch; do
+ if head -n 10 $PATCH_DIR/$patch | grep -q "mainline inclusion\|stable inclusion"; then
+ continue
+ fi
+
output=$(scripts/checkpatch.pl --ignore $ignores_for_main $PATCH_DIR/$patch)
if echo "$output" | grep -q "ERROR:"; then
echo "checkpatch $patch failed"
@@ -831,6 +835,10 @@ fi
%endif
%changelog
+
+* Wed Nov 8 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2311.1.0.0236
+- kernel.spec: skip check patches that from linux master or stable
+
* Mon Nov 6 2023 YunYi Yang <yangyunyi2(a)huawei.com> - 4.19.90-2311.1.0.0235
- Fix the header file location error and adjust the function and structure version.
- perf auxtrace arm64: Add support for parsing HiSilicon PCIe Trace packet
--
2.33.0
2
1
07 Nov '23
From: "liujian (CE)" <liujian56(a)huawei.com>
add net-acc to kernel-tools
Signed-off-by: Liu Jian <liujian56(a)huawei.com>
---
kernel.spec | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/kernel.spec b/kernel.spec
index 658564d..85a0dcf 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -12,7 +12,7 @@
%global upstream_sublevel 0
%global devel_release 166
%global maintenance_release .0.0
-%global pkg_release .79
+%global pkg_release .80
%define with_debuginfo 1
# Do not recompute the build-id of vmlinux in find-debuginfo.sh
@@ -429,6 +429,9 @@ popd
pushd tools/kvm/kvm_stat/
make %{?_smp_mflags} man
popd
+pushd tools/netacc
+make BPFTOOL=../../tools/bpf/bpftool/bpftool
+popd
%install
%if 0%{?with_source}
@@ -705,6 +708,9 @@ popd
pushd tools/kvm/kvm_stat
make INSTALL_ROOT=%{buildroot} install-tools
popd
+pushd tools/netacc
+make INSTALL_ROOT=%{buildroot} install
+popd
%define __spec_install_post\
%{?__debug_package:%{__debug_install_post}}\
@@ -853,6 +859,8 @@ fi
%{_bindir}/gpio-watch
%{_mandir}/man1/kvm_stat*
%{_bindir}/kvm_stat
+%{_sbindir}/net-acc
+%{_sbindir}/tuned_acc/netacc
%{_libdir}/libcpupower.so.0
%{_libdir}/libcpupower.so.0.0.1
%license linux-%{KernelVer}/COPYING
@@ -889,6 +897,9 @@ fi
%endif
%changelog
+* Tue Nov 07 2023 Liu Jian <liujian56(a)huawei.com> - 5.10.0-166.0.0.80
+- And net-acc tool to kernel-tools.
+
* Thu Nov 02 2023 Jialin Zhang <zhangjialin11(a)huawei.com> - 5.10.0-166.0.0.79
- !2675 RDMA/hns: Support STARS over RDMA
- !2688 nvmet-tcp: Fix a possible UAF in queue intialization setup
--
2.34.1
2
1
03 Nov '23
v1 -> v2: modified patch name
---
kernel.spec | 7 +-
...rm64-HWCAP-add-support-for-AT_HWCAP2.patch | 463 ++++++++++++++++++
...4-Expose-SVE2-features-for-userspace.patch | 275 +++++++++++
...-Fix-missing-ZFR0-in-__read_sysreg_b.patch | 55 +++
...-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch | 67 +++
series.conf | 4 +
6 files changed, 870 insertions(+), 1 deletion(-)
create mode 100644 patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
create mode 100644 patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
create mode 100644 patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
create mode 100644 patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
diff --git a/kernel.spec b/kernel.spec
index db1c158ac117..3047a91b59bb 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0232
+Release: %{hulkrelease}.0233
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -832,6 +832,11 @@ fi
%changelog
+* Fri Nov 3 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2310.4.0.0233
+- arm64: HWCAP: add support for AT_HWCAP2
+- arm64: Expose SVE2 features for userspace
+- arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding()
+
* Thu Nov 2 2023 hongrongxuan <hongrongxuan(a)huawei.com> - 4.19.90-2311.1.0.0232
- remove linux-kernel-test.patch
diff --git a/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch b/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
new file mode 100644
index 000000000000..46effba895fb
--- /dev/null
+++ b/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
@@ -0,0 +1,463 @@
+From a97497b283894653e53f7eb83b5825f5564d1614 Mon Sep 17 00:00:00 2001
+From: Andrew Murray <andrew.murray(a)arm.com>
+Date: Tue, 9 Apr 2019 10:52:40 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 1/4] arm64: HWCAP: add support for
+ AT_HWCAP2
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+As we will exhaust the first 32 bits of AT_HWCAP let's start
+exposing AT_HWCAP2 to userspace to give us up to 64 caps.
+
+Whilst it's possible to use the remaining 32 bits of AT_HWCAP, we
+prefer to expand into AT_HWCAP2 in order to provide a consistent
+view to userspace between ILP32 and LP64. However internal to the
+kernel we prefer to continue to use the full space of elf_hwcap.
+
+To reduce complexity and allow for future expansion, we now
+represent hwcaps in the kernel as ordinals and use a
+KERNEL_HWCAP_ prefix. This allows us to support automatic feature
+based module loading for all our hwcaps.
+
+We introduce cpu_set_feature to set hwcaps which complements the
+existing cpu_have_feature helper. These helpers allow us to clean
+up existing direct uses of elf_hwcap and reduce any future effort
+required to move beyond 64 caps.
+
+For convenience we also introduce cpu_{have,set}_named_feature which
+makes use of the cpu_feature macro to allow providing a hwcap name
+without a {KERNEL_}HWCAP_ prefix.
+
+Signed-off-by: Andrew Murray <andrew.murray(a)arm.com>
+[will: use const_ilog2() and tweak documentation]
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ Documentation/arm64/elf_hwcaps.txt
+ arch/arm64/crypto/chacha-neon-glue.c
+ arch/arm64/crypto/crct10dif-ce-glue.c
+ arch/arm64/crypto/ghash-ce-glue.c
+ arch/arm64/crypto/nhpoly1305-neon-glue.c
+ arch/arm64/kernel/cpufeature.c
+ drivers/clocksource/arm_arch_timer.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/elf_hwcaps.txt | 13 ++++--
+ arch/arm64/crypto/aes-ce-ccm-glue.c | 2 +-
+ arch/arm64/crypto/aes-neonbs-glue.c | 2 +-
+ arch/arm64/crypto/chacha20-neon-glue.c | 2 +-
+ arch/arm64/crypto/ghash-ce-glue.c | 6 +--
+ arch/arm64/crypto/sha256-glue.c | 4 +-
+ arch/arm64/include/asm/cpufeature.h | 22 +++++-----
+ arch/arm64/include/asm/hwcap.h | 49 ++++++++++++++++++++-
+ arch/arm64/include/uapi/asm/hwcap.h | 2 +-
+ arch/arm64/kernel/cpufeature.c | 60 +++++++++++++-------------
+ arch/arm64/kernel/cpuinfo.c | 2 +-
+ arch/arm64/kernel/fpsimd.c | 4 +-
+ drivers/clocksource/arm_arch_timer.c | 8 ++++
+ 13 files changed, 120 insertions(+), 56 deletions(-)
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 6feaffe90e22..186feb16e2f2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -13,9 +13,9 @@ architected discovery mechanism available to userspace code at EL0. The
+ kernel exposes the presence of these features to userspace through a set
+ of flags called hwcaps, exposed in the auxilliary vector.
+
+-Userspace software can test for features by acquiring the AT_HWCAP entry
+-of the auxilliary vector, and testing whether the relevant flags are
+-set, e.g.
++Userspace software can test for features by acquiring the AT_HWCAP or
++AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
++flags are set, e.g.
+
+ bool floating_point_is_present(void)
+ {
+@@ -182,3 +182,10 @@ HWCAP_FLAGM
+ HWCAP_SSBS
+
+ Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.
++
++
++4. Unused AT_HWCAP bits
++-----------------------
++
++For interoperation with userspace, the kernel guarantees that bits 62
++and 63 of AT_HWCAP will always be returned as 0.
+diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
+index 5fc6f51908fd..036ea77f83bc 100644
+--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
++++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
+@@ -372,7 +372,7 @@ static struct aead_alg ccm_aes_alg = {
+
+ static int __init aes_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_AES))
++ if (!cpu_have_named_feature(AES))
+ return -ENODEV;
+ return crypto_register_aead(&ccm_aes_alg);
+ }
+diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
+index 5cc248967387..742359801559 100644
+--- a/arch/arm64/crypto/aes-neonbs-glue.c
++++ b/arch/arm64/crypto/aes-neonbs-glue.c
+@@ -442,7 +442,7 @@ static int __init aes_init(void)
+ int err;
+ int i;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
+diff --git a/arch/arm64/crypto/chacha20-neon-glue.c b/arch/arm64/crypto/chacha20-neon-glue.c
+index 727579c93ded..bb3314905bee 100644
+--- a/arch/arm64/crypto/chacha20-neon-glue.c
++++ b/arch/arm64/crypto/chacha20-neon-glue.c
+@@ -114,7 +114,7 @@ static struct skcipher_alg alg = {
+
+ static int __init chacha20_simd_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ return crypto_register_skcipher(&alg);
+diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c
+index 1ed227bf6106..cd9d743cb40f 100644
+--- a/arch/arm64/crypto/ghash-ce-glue.c
++++ b/arch/arm64/crypto/ghash-ce-glue.c
+@@ -648,10 +648,10 @@ static int __init ghash_ce_mod_init(void)
+ {
+ int ret;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+- if (elf_hwcap & HWCAP_PMULL)
++ if (cpu_have_named_feature(PMULL))
+ pmull_ghash_update = pmull_ghash_update_p64;
+
+ else
+@@ -661,7 +661,7 @@ static int __init ghash_ce_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_PMULL) {
++ if (cpu_have_named_feature(PMULL)) {
+ ret = crypto_register_aead(&gcm_aes_alg);
+ if (ret)
+ crypto_unregister_shash(&ghash_alg);
+diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
+index 4aedeaefd61f..0cccdb9cc2c0 100644
+--- a/arch/arm64/crypto/sha256-glue.c
++++ b/arch/arm64/crypto/sha256-glue.c
+@@ -173,7 +173,7 @@ static int __init sha256_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_ASIMD) {
++ if (cpu_have_named_feature(ASIMD)) {
+ ret = crypto_register_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ if (ret)
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+@@ -183,7 +183,7 @@ static int __init sha256_mod_init(void)
+
+ static void __exit sha256_mod_fini(void)
+ {
+- if (elf_hwcap & HWCAP_ASIMD)
++ if (cpu_have_named_feature(ASIMD))
+ crypto_unregister_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+ }
+diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
+index ffb0a1ec0088..eef5a9c9b823 100644
+--- a/arch/arm64/include/asm/cpufeature.h
++++ b/arch/arm64/include/asm/cpufeature.h
+@@ -14,15 +14,8 @@
+ #include <asm/hwcap.h>
+ #include <asm/sysreg.h>
+
+-/*
+- * In the arm64 world (as in the ARM world), elf_hwcap is used both internally
+- * in the kernel and for user space to keep track of which optional features
+- * are supported by the current system. So let's map feature 'x' to HWCAP_x.
+- * Note that HWCAP_x constants are bit fields so we need to take the log.
+- */
+-
+-#define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap))
+-#define cpu_feature(x) ilog2(HWCAP_ ## x)
++#define MAX_CPU_FEATURES 64
++#define cpu_feature(x) KERNEL_HWCAP_ ## x
+
+ #ifndef __ASSEMBLY__
+
+@@ -372,10 +365,19 @@ extern bool set_cap_spectre_bhb;
+
+ bool this_cpu_has_cap(unsigned int cap);
+
++static inline void cpu_set_feature(unsigned int num)
++{
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ elf_hwcap |= BIT(num);
++}
++#define cpu_set_named_feature(name) cpu_set_feature(cpu_feature(name))
++
+ static inline bool cpu_have_feature(unsigned int num)
+ {
+- return elf_hwcap & (1UL << num);
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ return elf_hwcap & BIT(num);
+ }
++#define cpu_have_named_feature(name) cpu_have_feature(cpu_feature(name))
+
+ /* System capability check for constant caps */
+ static __always_inline bool __cpus_have_const_cap(int num)
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 428b745b5386..458ff2d7ece3 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -40,11 +40,58 @@
+ #define COMPAT_HWCAP2_CRC32 (1 << 4)
+
+ #ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <linux/log2.h>
++
++/*
++ * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
++ * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
++ * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
++ * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
++ *
++ * Hwcaps should be set and tested within the kernel via the
++ * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
++ * of KERNEL_HWCAP_{feature}.
++ */
++#define __khwcap_feature(x) const_ilog2(HWCAP_ ## x)
++#define KERNEL_HWCAP_FP __khwcap_feature(FP)
++#define KERNEL_HWCAP_ASIMD __khwcap_feature(ASIMD)
++#define KERNEL_HWCAP_EVTSTRM __khwcap_feature(EVTSTRM)
++#define KERNEL_HWCAP_AES __khwcap_feature(AES)
++#define KERNEL_HWCAP_PMULL __khwcap_feature(PMULL)
++#define KERNEL_HWCAP_SHA1 __khwcap_feature(SHA1)
++#define KERNEL_HWCAP_SHA2 __khwcap_feature(SHA2)
++#define KERNEL_HWCAP_CRC32 __khwcap_feature(CRC32)
++#define KERNEL_HWCAP_ATOMICS __khwcap_feature(ATOMICS)
++#define KERNEL_HWCAP_FPHP __khwcap_feature(FPHP)
++#define KERNEL_HWCAP_ASIMDHP __khwcap_feature(ASIMDHP)
++#define KERNEL_HWCAP_CPUID __khwcap_feature(CPUID)
++#define KERNEL_HWCAP_ASIMDRDM __khwcap_feature(ASIMDRDM)
++#define KERNEL_HWCAP_JSCVT __khwcap_feature(JSCVT)
++#define KERNEL_HWCAP_FCMA __khwcap_feature(FCMA)
++#define KERNEL_HWCAP_LRCPC __khwcap_feature(LRCPC)
++#define KERNEL_HWCAP_DCPOP __khwcap_feature(DCPOP)
++#define KERNEL_HWCAP_SHA3 __khwcap_feature(SHA3)
++#define KERNEL_HWCAP_SM3 __khwcap_feature(SM3)
++#define KERNEL_HWCAP_SM4 __khwcap_feature(SM4)
++#define KERNEL_HWCAP_ASIMDDP __khwcap_feature(ASIMDDP)
++#define KERNEL_HWCAP_SHA512 __khwcap_feature(SHA512)
++#define KERNEL_HWCAP_SVE __khwcap_feature(SVE)
++#define KERNEL_HWCAP_ASIMDFHM __khwcap_feature(ASIMDFHM)
++#define KERNEL_HWCAP_DIT __khwcap_feature(DIT)
++#define KERNEL_HWCAP_USCAT __khwcap_feature(USCAT)
++#define KERNEL_HWCAP_ILRCPC __khwcap_feature(ILRCPC)
++#define KERNEL_HWCAP_FLAGM __khwcap_feature(FLAGM)
++#define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
++
++#define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++
+ /*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports.
+ */
+-#define ELF_HWCAP (elf_hwcap)
++#define ELF_HWCAP lower_32_bits(elf_hwcap)
++#define ELF_HWCAP2 upper_32_bits(elf_hwcap)
+
+ #ifdef CONFIG_AARCH32_EL0
+ extern unsigned int a32_elf_hwcap, a32_elf_hwcap2;
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 2bcd6e4f3474..602158a55554 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -18,7 +18,7 @@
+ #define _UAPI__ASM_HWCAP_H
+
+ /*
+- * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
++ * HWCAP flags - for AT_HWCAP
+ */
+ #define HWCAP_FP (1 << 0)
+ #define HWCAP_ASIMD (1 << 1)
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 1c93cc3f7692..3a0e7e10f2d7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -1553,35 +1553,35 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
+ }
+
+ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_PMULL),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_AES),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA1),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA2),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_SHA512),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_CRC32),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ATOMICS),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDRDM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM4),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDDP),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDFHM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FLAGM),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_FP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_FPHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_DIT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_DCPOP),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_JSCVT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FCMA),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_LRCPC),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ILRCPC),
+- HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_USCAT),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_PMULL),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_AES),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA1),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA2),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_SHA512),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_CRC32),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ATOMICS),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDRDM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM4),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDDP),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDFHM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FLAGM),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_FP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FPHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_ASIMD),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DIT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DCPOP),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_JSCVT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FCMA),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_LRCPC),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ILRCPC),
++ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
+ #endif
+- HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, HWCAP_SSBS),
++ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+ };
+
+@@ -1627,7 +1627,7 @@ static void __init cap_set_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ {
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- elf_hwcap |= cap->hwcap;
++ cpu_set_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1650,7 +1650,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- rc = (elf_hwcap & cap->hwcap) != 0;
++ rc = cpu_have_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1671,7 +1671,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ static void __init setup_elf_hwcaps(const struct arm64_cpu_capabilities *hwcaps)
+ {
+ /* We support emulation of accesses to CPU ID feature registers */
+- elf_hwcap |= HWCAP_CPUID;
++ cpu_set_named_feature(CPUID);
+ for (; hwcaps->matches; hwcaps++)
+ if (hwcaps->matches(hwcaps, cpucap_default_scope(hwcaps)))
+ cap_set_elf_hwcap(hwcaps);
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index 005d88db1082..bfe3bb8f05fe 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -164,7 +164,7 @@ static int c_show(struct seq_file *m, void *v)
+ #endif /* CONFIG_AARCH32_EL0 */
+ } else {
+ for (j = 0; hwcap_str[j]; j++)
+- if (elf_hwcap & (1 << j))
++ if (cpu_have_feature(j))
+ seq_printf(m, " %s", hwcap_str[j]);
+ }
+ seq_puts(m, "\n");
+diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
+index bb048144c3bd..6972de5681ec 100644
+--- a/arch/arm64/kernel/fpsimd.c
++++ b/arch/arm64/kernel/fpsimd.c
+@@ -1302,14 +1302,14 @@ static inline void fpsimd_hotplug_init(void) { }
+ */
+ static int __init fpsimd_init(void)
+ {
+- if (elf_hwcap & HWCAP_FP) {
++ if (cpu_have_named_feature(FP)) {
+ fpsimd_pm_init();
+ fpsimd_hotplug_init();
+ } else {
+ pr_notice("Floating-point is not implemented\n");
+ }
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ pr_notice("Advanced SIMD is not implemented\n");
+
+ return sve_sysctl_init();
+diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
+index 58863fd9c91b..fbfc81932dea 100644
+--- a/drivers/clocksource/arm_arch_timer.c
++++ b/drivers/clocksource/arm_arch_timer.c
+@@ -825,7 +825,11 @@ static void arch_timer_evtstrm_enable(int divider)
+ cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT)
+ | ARCH_TIMER_VIRT_EVT_EN;
+ arch_timer_set_cntkctl(cntkctl);
++#ifdef CONFIG_ARM64
++ cpu_set_named_feature(EVTSTRM);
++#else
+ elf_hwcap |= HWCAP_EVTSTRM;
++#endif
+ #ifdef CONFIG_AARCH32_EL0
+ a32_elf_hwcap |= COMPAT_HWCAP_EVTSTRM;
+ #endif
+@@ -1059,7 +1063,11 @@ static int arch_timer_cpu_pm_notify(struct notifier_block *self,
+ } else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) {
+ arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
+
++#ifdef CONFIG_ARM64
++ if (cpu_have_named_feature(EVTSTRM))
++#else
+ if (elf_hwcap & HWCAP_EVTSTRM)
++#endif
+ cpumask_set_cpu(smp_processor_id(), &evtstrm_available);
+ }
+ return NOTIFY_OK;
+--
+2.25.1
+
diff --git a/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch b/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
new file mode 100644
index 000000000000..45f709f3fab0
--- /dev/null
+++ b/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
@@ -0,0 +1,275 @@
+From 2ba00283ddd367afa75f72e3b4de15f80b4a97a7 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Thu, 18 Apr 2019 18:41:38 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 2/4] arm64: Expose SVE2 features for
+ userspace
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+This patch provides support for reporting the presence of SVE2 and
+its optional features to userspace.
+
+This will also enable visibility of SVE2 for guests, when KVM
+support for SVE-enabled guests is available.
+
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ arch/arm64/include/asm/hwcap.h
+ arch/arm64/include/uapi/asm/hwcap.h
+ arch/arm64/kernel/cpuinfo.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/cpu-feature-registers.txt | 16 +++++++++++++
+ Documentation/arm64/elf_hwcaps.txt | 24 +++++++++++++++++++
+ Documentation/arm64/sve.txt | 17 +++++++++++++
+ arch/arm64/Kconfig | 3 +++
+ arch/arm64/include/asm/hwcap.h | 6 +++++
+ arch/arm64/include/asm/sysreg.h | 14 +++++++++++
+ arch/arm64/include/uapi/asm/hwcap.h | 10 ++++++++
+ arch/arm64/kernel/cpufeature.c | 17 ++++++++++++-
+ arch/arm64/kernel/cpuinfo.c | 10 ++++++++
+ 9 files changed, 116 insertions(+), 1 deletion(-)
+
+diff --git a/Documentation/arm64/cpu-feature-registers.txt b/Documentation/arm64/cpu-feature-registers.txt
+index 7964f03846b1..fcd2e1deb886 100644
+--- a/Documentation/arm64/cpu-feature-registers.txt
++++ b/Documentation/arm64/cpu-feature-registers.txt
+@@ -201,6 +201,22 @@ infrastructure:
+ | AT | [35-32] | y |
+ x--------------------------------------------------x
+
++ 6) ID_AA64ZFR0_EL1 - SVE feature ID register 0
++
++ x--------------------------------------------------x
++ | Name | bits | visible |
++ |--------------------------------------------------|
++ | SM4 | [43-40] | y |
++ |--------------------------------------------------|
++ | SHA3 | [35-32] | y |
++ |--------------------------------------------------|
++ | BitPerm | [19-16] | y |
++ |--------------------------------------------------|
++ | AES | [7-4] | y |
++ |--------------------------------------------------|
++ | SVEVer | [3-0] | y |
++ x--------------------------------------------------x
++
+ Appendix I: Example
+ ---------------------------
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 186feb16e2f2..e2ce14dfccf2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -159,6 +159,30 @@ HWCAP_SVE
+
+ Functionality implied by ID_AA64PFR0_EL1.SVE == 0b0001.
+
++HWCAP2_SVE2
++
++ Functionality implied by ID_AA64ZFR0_EL1.SVEVer == 0b0001.
++
++HWCAP2_SVEAES
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0001.
++
++HWCAP2_SVEPMULL
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0010.
++
++HWCAP2_SVEBITPERM
++
++ Functionality implied by ID_AA64ZFR0_EL1.BitPerm == 0b0001.
++
++HWCAP2_SVESHA3
++
++ Functionality implied by ID_AA64ZFR0_EL1.SHA3 == 0b0001.
++
++HWCAP2_SVESM4
++
++ Functionality implied by ID_AA64ZFR0_EL1.SM4 == 0b0001.
++
+ HWCAP_ASIMDFHM
+
+ Functionality implied by ID_AA64ISAR0_EL1.FHM == 0b0001.
+diff --git a/Documentation/arm64/sve.txt b/Documentation/arm64/sve.txt
+index 2001d84384ca..5689fc9a976a 100644
+--- a/Documentation/arm64/sve.txt
++++ b/Documentation/arm64/sve.txt
+@@ -34,6 +34,23 @@ model features for SVE is included in Appendix A.
+ following sections: software that needs to verify that those interfaces are
+ present must check for HWCAP_SVE instead.
+
++* On hardware that supports the SVE2 extensions, HWCAP2_SVE2 will also
++ be reported in the AT_HWCAP2 aux vector entry. In addition to this,
++ optional extensions to SVE2 may be reported by the presence of:
++
++ HWCAP2_SVE2
++ HWCAP2_SVEAES
++ HWCAP2_SVEPMULL
++ HWCAP2_SVEBITPERM
++ HWCAP2_SVESHA3
++ HWCAP2_SVESM4
++
++ This list may be extended over time as the SVE architecture evolves.
++
++ These extensions are also reported via the CPU ID register ID_AA64ZFR0_EL1,
++ which userspace can read using an MRS instruction. See elf_hwcaps.txt and
++ cpu-feature-registers.txt for details.
++
+ * Debuggers should restrict themselves to interacting with the target via the
+ NT_ARM_SVE regset. The recommended way of detecting support for this regset
+ is to connect to a target process first and then attempt a
+diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
+index 88b8031a93b2..f7398a1904a2 100644
+--- a/arch/arm64/Kconfig
++++ b/arch/arm64/Kconfig
+@@ -1316,6 +1316,9 @@ config ARM64_SVE
+
+ To enable use of this extension on CPUs that implement it, say Y.
+
++ On CPUs that support the SVE2 extensions, this option will enable
++ those too.
++
+ Note that for architectural reasons, firmware _must_ implement SVE
+ support when running on SVE capable hardware. The required support
+ is present in:
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 458ff2d7ece3..08315a3bf387 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -85,6 +85,12 @@
+ #define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
+
+ #define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++#define KERNEL_HWCAP_SVE2 __khwcap2_feature(SVE2)
++#define KERNEL_HWCAP_SVEAES __khwcap2_feature(SVEAES)
++#define KERNEL_HWCAP_SVEPMULL __khwcap2_feature(SVEPMULL)
++#define KERNEL_HWCAP_SVEBITPERM __khwcap2_feature(SVEBITPERM)
++#define KERNEL_HWCAP_SVESHA3 __khwcap2_feature(SVESHA3)
++#define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4)
+
+ /*
+ * This yields a mask that user programs can use to figure out what
+diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
+index 0fd51d253648..69618e602ed8 100644
+--- a/arch/arm64/include/asm/sysreg.h
++++ b/arch/arm64/include/asm/sysreg.h
+@@ -564,6 +564,20 @@
+ #define ID_AA64PFR1_SSBS_PSTATE_ONLY 1
+ #define ID_AA64PFR1_SSBS_PSTATE_INSNS 2
+
++/* id_aa64zfr0 */
++#define ID_AA64ZFR0_SM4_SHIFT 40
++#define ID_AA64ZFR0_SHA3_SHIFT 32
++#define ID_AA64ZFR0_BITPERM_SHIFT 16
++#define ID_AA64ZFR0_AES_SHIFT 4
++#define ID_AA64ZFR0_SVEVER_SHIFT 0
++
++#define ID_AA64ZFR0_SM4 0x1
++#define ID_AA64ZFR0_SHA3 0x1
++#define ID_AA64ZFR0_BITPERM 0x1
++#define ID_AA64ZFR0_AES 0x1
++#define ID_AA64ZFR0_AES_PMULL 0x2
++#define ID_AA64ZFR0_SVEVER_SVE2 0x1
++
+ /* id_aa64mmfr0 */
+ #define ID_AA64MMFR0_TGRAN4_SHIFT 28
+ #define ID_AA64MMFR0_TGRAN64_SHIFT 24
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 602158a55554..fea93415b493 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -50,4 +50,14 @@
+ #define HWCAP_FLAGM (1 << 27)
+ #define HWCAP_SSBS (1 << 28)
+
++/*
++ * HWCAP2 flags - for AT_HWCAP2
++ */
++#define HWCAP2_SVE2 (1 << 1)
++#define HWCAP2_SVEAES (1 << 2)
++#define HWCAP2_SVEPMULL (1 << 3)
++#define HWCAP2_SVEBITPERM (1 << 4)
++#define HWCAP2_SVESHA3 (1 << 5)
++#define HWCAP2_SVESM4 (1 << 6)
++
+ #endif /* _UAPI__ASM_HWCAP_H */
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 3a0e7e10f2d7..4f384bbd86c7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -183,6 +183,15 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ ARM64_FTR_END,
+ };
+
++static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_END,
++};
++
+ static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
+ /*
+ * We already refuse to boot CPUs that don't support our configured
+@@ -399,7 +408,7 @@ static const struct __ftr_reg_entry {
+ /* Op1 = 0, CRn = 0, CRm = 4 */
+ ARM64_FTR_REG(SYS_ID_AA64PFR0_EL1, ftr_id_aa64pfr0),
+ ARM64_FTR_REG(SYS_ID_AA64PFR1_EL1, ftr_id_aa64pfr1),
+- ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_raz),
++ ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_id_aa64zfr0),
+
+ /* Op1 = 0, CRn = 0, CRm = 5 */
+ ARM64_FTR_REG(SYS_ID_AA64DFR0_EL1, ftr_id_aa64dfr0),
+@@ -1580,6 +1589,12 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SVEVER_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SVEVER_SVE2, CAP_HWCAP, KERNEL_HWCAP_SVE2),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES, CAP_HWCAP, KERNEL_HWCAP_SVEAES),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES_PMULL, CAP_HWCAP, KERNEL_HWCAP_SVEPMULL),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_BITPERM_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_BITPERM, CAP_HWCAP, KERNEL_HWCAP_SVEBITPERM),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SHA3_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SHA3, CAP_HWCAP, KERNEL_HWCAP_SVESHA3),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SM4_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SM4, CAP_HWCAP, KERNEL_HWCAP_SVESM4),
+ #endif
+ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index bfe3bb8f05fe..c8e4ddd23f0c 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -82,6 +82,16 @@ static const char *const hwcap_str[] = {
+ "ilrcpc",
+ "flagm",
+ "ssbs",
++ "sb",
++ "paca",
++ "pacg",
++ "dcpodp",
++ "sve2",
++ "sveaes",
++ "svepmull",
++ "svebitperm",
++ "svesha3",
++ "svesm4",
+ NULL
+ };
+
+--
+2.25.1
+
diff --git a/patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch b/patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
new file mode 100644
index 000000000000..4ce008cecf19
--- /dev/null
+++ b/patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
@@ -0,0 +1,55 @@
+From 9f8dff634365e7bfa0c764ccd31b54a4f0992bc8 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Mon, 3 Jun 2019 16:35:02 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 3/4] arm64: cpufeature: Fix missing
+ ZFR0 in __read_sysreg_by_encoding()
+
+mainline inclusion
+from mainline-v5.2-rc4
+commit 78ed70bf3a923f1965e3c19f544677d418397108
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+In commit 06a916feca2b ("arm64: Expose SVE2 features for
+userspace"), new hwcaps are added that are detected via fields in
+the SVE-specific ID register ID_AA64ZFR0_EL1.
+
+In order to check compatibility of secondary cpus with the hwcaps
+established at boot, the cpufeatures code uses
+__read_sysreg_by_encoding() to read this ID register based on the
+sys_reg field of the arm64_elf_hwcaps[] table.
+
+This leads to a kernel splat if an hwcap uses an ID register that
+__read_sysreg_by_encoding() doesn't explicitly handle, as now
+happens when exercising cpu hotplug on an SVE2-capable platform.
+
+So fix it by adding the required case in there.
+
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 4f384bbd86c7..8e7473df2660 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -828,6 +828,7 @@ static u64 __read_sysreg_by_encoding(u32 sys_id)
+
+ read_sysreg_case(SYS_ID_AA64PFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64PFR1_EL1);
++ read_sysreg_case(SYS_ID_AA64ZFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR1_EL1);
+ read_sysreg_case(SYS_ID_AA64MMFR0_EL1);
+--
+2.25.1
+
diff --git a/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch b/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
new file mode 100644
index 000000000000..7df40531adda
--- /dev/null
+++ b/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
@@ -0,0 +1,67 @@
+From 515c2917ae3bc768e8793dac6b27ea4dff36b40c Mon Sep 17 00:00:00 2001
+From: Julien Grall <julien.grall(a)arm.com>
+Date: Mon, 14 Oct 2019 11:21:13 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 4/4] arm64: cpufeature: Treat
+ ID_AA64ZFR0_EL1 as RAZ when SVE is not enabled
+
+mainline inclusion
+from mainline-v5.4-rc4
+commit ec52c7134b1fcef0edfc56d55072fd4f261ef198
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+If CONFIG_ARM64_SVE=n then we fail to report ID_AA64ZFR0_EL1 as 0 when
+read by userspace, despite being required by the architecture. Although
+this is theoretically a change in ABI, userspace will first check for
+the presence of SVE via the HWCAP or the ID_AA64PFR0_EL1.SVE field
+before probing the ID_AA64ZFR0_EL1 register. Given that these are
+reported correctly for this configuration, we can safely tighten up the
+current behaviour.
+
+Ensure ID_AA64ZFR0_EL1 is treated as RAZ when CONFIG_ARM64_SVE=n.
+
+Signed-off-by: Julien Grall <julien.grall(a)arm.com>
+Reviewed-by: Suzuki K Poulose <suzuki.poulose(a)arm.com>
+Reviewed-by: Mark Rutland <mark.rutland(a)arm.com>
+Reviewed-by: Dave Martin <dave.martin(a)arm.com>
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Will Deacon <will(a)kernel.org>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 8e7473df2660..98a8b2703f84 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -184,11 +184,16 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ };
+
+ static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
+ ARM64_FTR_END,
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index 4a8fef62b657..b4c8a39443d8 100644
--- a/series.conf
+++ b/series.conf
@@ -97,3 +97,7 @@ patches/0093-Revert-perf-smmuv3_pmu-Enable-HiSilicon-Erratum-1620.patch
patches/0094-perf-smmuv3-Enable-HiSilicon-Erratum-162001800-quirk.patch
patches/0095-perf-smmuv3-Enable-HiSilicon-Erratum-162001900-quirk.patch
patches/0096-perf-smmuv3-Add-MODULE_ALIAS-for-module-auto-loading.patch
+patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
+patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
+patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
+patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
--
2.25.1
2
1
---
kernel.spec | 7 +-
...-Fix-missing-ZFR0-in-__read_sysreg_b.patch | 55 +++
...rm64-HWCAP-add-support-for-AT_HWCAP2.patch | 463 ++++++++++++++++++
...4-Expose-SVE2-features-for-userspace.patch | 275 +++++++++++
...-Expose-SVE2-features-for-userspace.patch} | 0
...-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch | 67 +++
series.conf | 4 +
7 files changed, 870 insertions(+), 1 deletion(-)
create mode 100644 patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
create mode 100644 patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
create mode 100644 patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
rename patches/{0044-Revert-perf-hisi-Add-support-for-HiSilicon-SoC-LPDDR.patch => 0099-Expose-SVE2-features-for-userspace.patch} (100%)
create mode 100644 patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
diff --git a/kernel.spec b/kernel.spec
index acf822fc666d..a1a1fad55bdd 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0231
+Release: %{hulkrelease}.0232
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -832,6 +832,11 @@ fi
%changelog
+* Fri Nov 3 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2310.4.0.0232
+- arm64: HWCAP: add support for AT_HWCAP2
+- arm64: Expose SVE2 features for userspace
+- arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding()
+
* Wed Nov 1 2023 hongrongxuan <hongrongxuan(a)huawei.com> - 4.19.90-2311.1.0.0231
- perf/smmuv3: Add MODULE_ALIAS for module auto loading
- perf/smmuv3: Enable HiSilicon Erratum 162001900 quirk for HIP08/09
diff --git a/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch b/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
new file mode 100644
index 000000000000..4ce008cecf19
--- /dev/null
+++ b/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
@@ -0,0 +1,55 @@
+From 9f8dff634365e7bfa0c764ccd31b54a4f0992bc8 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Mon, 3 Jun 2019 16:35:02 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 3/4] arm64: cpufeature: Fix missing
+ ZFR0 in __read_sysreg_by_encoding()
+
+mainline inclusion
+from mainline-v5.2-rc4
+commit 78ed70bf3a923f1965e3c19f544677d418397108
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+In commit 06a916feca2b ("arm64: Expose SVE2 features for
+userspace"), new hwcaps are added that are detected via fields in
+the SVE-specific ID register ID_AA64ZFR0_EL1.
+
+In order to check compatibility of secondary cpus with the hwcaps
+established at boot, the cpufeatures code uses
+__read_sysreg_by_encoding() to read this ID register based on the
+sys_reg field of the arm64_elf_hwcaps[] table.
+
+This leads to a kernel splat if an hwcap uses an ID register that
+__read_sysreg_by_encoding() doesn't explicitly handle, as now
+happens when exercising cpu hotplug on an SVE2-capable platform.
+
+So fix it by adding the required case in there.
+
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 4f384bbd86c7..8e7473df2660 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -828,6 +828,7 @@ static u64 __read_sysreg_by_encoding(u32 sys_id)
+
+ read_sysreg_case(SYS_ID_AA64PFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64PFR1_EL1);
++ read_sysreg_case(SYS_ID_AA64ZFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR1_EL1);
+ read_sysreg_case(SYS_ID_AA64MMFR0_EL1);
+--
+2.25.1
+
diff --git a/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch b/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
new file mode 100644
index 000000000000..46effba895fb
--- /dev/null
+++ b/patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
@@ -0,0 +1,463 @@
+From a97497b283894653e53f7eb83b5825f5564d1614 Mon Sep 17 00:00:00 2001
+From: Andrew Murray <andrew.murray(a)arm.com>
+Date: Tue, 9 Apr 2019 10:52:40 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 1/4] arm64: HWCAP: add support for
+ AT_HWCAP2
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+As we will exhaust the first 32 bits of AT_HWCAP let's start
+exposing AT_HWCAP2 to userspace to give us up to 64 caps.
+
+Whilst it's possible to use the remaining 32 bits of AT_HWCAP, we
+prefer to expand into AT_HWCAP2 in order to provide a consistent
+view to userspace between ILP32 and LP64. However internal to the
+kernel we prefer to continue to use the full space of elf_hwcap.
+
+To reduce complexity and allow for future expansion, we now
+represent hwcaps in the kernel as ordinals and use a
+KERNEL_HWCAP_ prefix. This allows us to support automatic feature
+based module loading for all our hwcaps.
+
+We introduce cpu_set_feature to set hwcaps which complements the
+existing cpu_have_feature helper. These helpers allow us to clean
+up existing direct uses of elf_hwcap and reduce any future effort
+required to move beyond 64 caps.
+
+For convenience we also introduce cpu_{have,set}_named_feature which
+makes use of the cpu_feature macro to allow providing a hwcap name
+without a {KERNEL_}HWCAP_ prefix.
+
+Signed-off-by: Andrew Murray <andrew.murray(a)arm.com>
+[will: use const_ilog2() and tweak documentation]
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ Documentation/arm64/elf_hwcaps.txt
+ arch/arm64/crypto/chacha-neon-glue.c
+ arch/arm64/crypto/crct10dif-ce-glue.c
+ arch/arm64/crypto/ghash-ce-glue.c
+ arch/arm64/crypto/nhpoly1305-neon-glue.c
+ arch/arm64/kernel/cpufeature.c
+ drivers/clocksource/arm_arch_timer.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/elf_hwcaps.txt | 13 ++++--
+ arch/arm64/crypto/aes-ce-ccm-glue.c | 2 +-
+ arch/arm64/crypto/aes-neonbs-glue.c | 2 +-
+ arch/arm64/crypto/chacha20-neon-glue.c | 2 +-
+ arch/arm64/crypto/ghash-ce-glue.c | 6 +--
+ arch/arm64/crypto/sha256-glue.c | 4 +-
+ arch/arm64/include/asm/cpufeature.h | 22 +++++-----
+ arch/arm64/include/asm/hwcap.h | 49 ++++++++++++++++++++-
+ arch/arm64/include/uapi/asm/hwcap.h | 2 +-
+ arch/arm64/kernel/cpufeature.c | 60 +++++++++++++-------------
+ arch/arm64/kernel/cpuinfo.c | 2 +-
+ arch/arm64/kernel/fpsimd.c | 4 +-
+ drivers/clocksource/arm_arch_timer.c | 8 ++++
+ 13 files changed, 120 insertions(+), 56 deletions(-)
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 6feaffe90e22..186feb16e2f2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -13,9 +13,9 @@ architected discovery mechanism available to userspace code at EL0. The
+ kernel exposes the presence of these features to userspace through a set
+ of flags called hwcaps, exposed in the auxilliary vector.
+
+-Userspace software can test for features by acquiring the AT_HWCAP entry
+-of the auxilliary vector, and testing whether the relevant flags are
+-set, e.g.
++Userspace software can test for features by acquiring the AT_HWCAP or
++AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
++flags are set, e.g.
+
+ bool floating_point_is_present(void)
+ {
+@@ -182,3 +182,10 @@ HWCAP_FLAGM
+ HWCAP_SSBS
+
+ Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.
++
++
++4. Unused AT_HWCAP bits
++-----------------------
++
++For interoperation with userspace, the kernel guarantees that bits 62
++and 63 of AT_HWCAP will always be returned as 0.
+diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
+index 5fc6f51908fd..036ea77f83bc 100644
+--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
++++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
+@@ -372,7 +372,7 @@ static struct aead_alg ccm_aes_alg = {
+
+ static int __init aes_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_AES))
++ if (!cpu_have_named_feature(AES))
+ return -ENODEV;
+ return crypto_register_aead(&ccm_aes_alg);
+ }
+diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
+index 5cc248967387..742359801559 100644
+--- a/arch/arm64/crypto/aes-neonbs-glue.c
++++ b/arch/arm64/crypto/aes-neonbs-glue.c
+@@ -442,7 +442,7 @@ static int __init aes_init(void)
+ int err;
+ int i;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
+diff --git a/arch/arm64/crypto/chacha20-neon-glue.c b/arch/arm64/crypto/chacha20-neon-glue.c
+index 727579c93ded..bb3314905bee 100644
+--- a/arch/arm64/crypto/chacha20-neon-glue.c
++++ b/arch/arm64/crypto/chacha20-neon-glue.c
+@@ -114,7 +114,7 @@ static struct skcipher_alg alg = {
+
+ static int __init chacha20_simd_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ return crypto_register_skcipher(&alg);
+diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c
+index 1ed227bf6106..cd9d743cb40f 100644
+--- a/arch/arm64/crypto/ghash-ce-glue.c
++++ b/arch/arm64/crypto/ghash-ce-glue.c
+@@ -648,10 +648,10 @@ static int __init ghash_ce_mod_init(void)
+ {
+ int ret;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+- if (elf_hwcap & HWCAP_PMULL)
++ if (cpu_have_named_feature(PMULL))
+ pmull_ghash_update = pmull_ghash_update_p64;
+
+ else
+@@ -661,7 +661,7 @@ static int __init ghash_ce_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_PMULL) {
++ if (cpu_have_named_feature(PMULL)) {
+ ret = crypto_register_aead(&gcm_aes_alg);
+ if (ret)
+ crypto_unregister_shash(&ghash_alg);
+diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
+index 4aedeaefd61f..0cccdb9cc2c0 100644
+--- a/arch/arm64/crypto/sha256-glue.c
++++ b/arch/arm64/crypto/sha256-glue.c
+@@ -173,7 +173,7 @@ static int __init sha256_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_ASIMD) {
++ if (cpu_have_named_feature(ASIMD)) {
+ ret = crypto_register_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ if (ret)
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+@@ -183,7 +183,7 @@ static int __init sha256_mod_init(void)
+
+ static void __exit sha256_mod_fini(void)
+ {
+- if (elf_hwcap & HWCAP_ASIMD)
++ if (cpu_have_named_feature(ASIMD))
+ crypto_unregister_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+ }
+diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
+index ffb0a1ec0088..eef5a9c9b823 100644
+--- a/arch/arm64/include/asm/cpufeature.h
++++ b/arch/arm64/include/asm/cpufeature.h
+@@ -14,15 +14,8 @@
+ #include <asm/hwcap.h>
+ #include <asm/sysreg.h>
+
+-/*
+- * In the arm64 world (as in the ARM world), elf_hwcap is used both internally
+- * in the kernel and for user space to keep track of which optional features
+- * are supported by the current system. So let's map feature 'x' to HWCAP_x.
+- * Note that HWCAP_x constants are bit fields so we need to take the log.
+- */
+-
+-#define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap))
+-#define cpu_feature(x) ilog2(HWCAP_ ## x)
++#define MAX_CPU_FEATURES 64
++#define cpu_feature(x) KERNEL_HWCAP_ ## x
+
+ #ifndef __ASSEMBLY__
+
+@@ -372,10 +365,19 @@ extern bool set_cap_spectre_bhb;
+
+ bool this_cpu_has_cap(unsigned int cap);
+
++static inline void cpu_set_feature(unsigned int num)
++{
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ elf_hwcap |= BIT(num);
++}
++#define cpu_set_named_feature(name) cpu_set_feature(cpu_feature(name))
++
+ static inline bool cpu_have_feature(unsigned int num)
+ {
+- return elf_hwcap & (1UL << num);
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ return elf_hwcap & BIT(num);
+ }
++#define cpu_have_named_feature(name) cpu_have_feature(cpu_feature(name))
+
+ /* System capability check for constant caps */
+ static __always_inline bool __cpus_have_const_cap(int num)
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 428b745b5386..458ff2d7ece3 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -40,11 +40,58 @@
+ #define COMPAT_HWCAP2_CRC32 (1 << 4)
+
+ #ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <linux/log2.h>
++
++/*
++ * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
++ * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
++ * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
++ * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
++ *
++ * Hwcaps should be set and tested within the kernel via the
++ * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
++ * of KERNEL_HWCAP_{feature}.
++ */
++#define __khwcap_feature(x) const_ilog2(HWCAP_ ## x)
++#define KERNEL_HWCAP_FP __khwcap_feature(FP)
++#define KERNEL_HWCAP_ASIMD __khwcap_feature(ASIMD)
++#define KERNEL_HWCAP_EVTSTRM __khwcap_feature(EVTSTRM)
++#define KERNEL_HWCAP_AES __khwcap_feature(AES)
++#define KERNEL_HWCAP_PMULL __khwcap_feature(PMULL)
++#define KERNEL_HWCAP_SHA1 __khwcap_feature(SHA1)
++#define KERNEL_HWCAP_SHA2 __khwcap_feature(SHA2)
++#define KERNEL_HWCAP_CRC32 __khwcap_feature(CRC32)
++#define KERNEL_HWCAP_ATOMICS __khwcap_feature(ATOMICS)
++#define KERNEL_HWCAP_FPHP __khwcap_feature(FPHP)
++#define KERNEL_HWCAP_ASIMDHP __khwcap_feature(ASIMDHP)
++#define KERNEL_HWCAP_CPUID __khwcap_feature(CPUID)
++#define KERNEL_HWCAP_ASIMDRDM __khwcap_feature(ASIMDRDM)
++#define KERNEL_HWCAP_JSCVT __khwcap_feature(JSCVT)
++#define KERNEL_HWCAP_FCMA __khwcap_feature(FCMA)
++#define KERNEL_HWCAP_LRCPC __khwcap_feature(LRCPC)
++#define KERNEL_HWCAP_DCPOP __khwcap_feature(DCPOP)
++#define KERNEL_HWCAP_SHA3 __khwcap_feature(SHA3)
++#define KERNEL_HWCAP_SM3 __khwcap_feature(SM3)
++#define KERNEL_HWCAP_SM4 __khwcap_feature(SM4)
++#define KERNEL_HWCAP_ASIMDDP __khwcap_feature(ASIMDDP)
++#define KERNEL_HWCAP_SHA512 __khwcap_feature(SHA512)
++#define KERNEL_HWCAP_SVE __khwcap_feature(SVE)
++#define KERNEL_HWCAP_ASIMDFHM __khwcap_feature(ASIMDFHM)
++#define KERNEL_HWCAP_DIT __khwcap_feature(DIT)
++#define KERNEL_HWCAP_USCAT __khwcap_feature(USCAT)
++#define KERNEL_HWCAP_ILRCPC __khwcap_feature(ILRCPC)
++#define KERNEL_HWCAP_FLAGM __khwcap_feature(FLAGM)
++#define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
++
++#define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++
+ /*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports.
+ */
+-#define ELF_HWCAP (elf_hwcap)
++#define ELF_HWCAP lower_32_bits(elf_hwcap)
++#define ELF_HWCAP2 upper_32_bits(elf_hwcap)
+
+ #ifdef CONFIG_AARCH32_EL0
+ extern unsigned int a32_elf_hwcap, a32_elf_hwcap2;
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 2bcd6e4f3474..602158a55554 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -18,7 +18,7 @@
+ #define _UAPI__ASM_HWCAP_H
+
+ /*
+- * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
++ * HWCAP flags - for AT_HWCAP
+ */
+ #define HWCAP_FP (1 << 0)
+ #define HWCAP_ASIMD (1 << 1)
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 1c93cc3f7692..3a0e7e10f2d7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -1553,35 +1553,35 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
+ }
+
+ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_PMULL),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_AES),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA1),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA2),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_SHA512),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_CRC32),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ATOMICS),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDRDM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM4),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDDP),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDFHM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FLAGM),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_FP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_FPHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_DIT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_DCPOP),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_JSCVT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FCMA),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_LRCPC),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ILRCPC),
+- HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_USCAT),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_PMULL),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_AES),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA1),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA2),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_SHA512),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_CRC32),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ATOMICS),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDRDM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM4),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDDP),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDFHM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FLAGM),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_FP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FPHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_ASIMD),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DIT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DCPOP),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_JSCVT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FCMA),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_LRCPC),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ILRCPC),
++ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
+ #endif
+- HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, HWCAP_SSBS),
++ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+ };
+
+@@ -1627,7 +1627,7 @@ static void __init cap_set_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ {
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- elf_hwcap |= cap->hwcap;
++ cpu_set_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1650,7 +1650,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- rc = (elf_hwcap & cap->hwcap) != 0;
++ rc = cpu_have_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1671,7 +1671,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ static void __init setup_elf_hwcaps(const struct arm64_cpu_capabilities *hwcaps)
+ {
+ /* We support emulation of accesses to CPU ID feature registers */
+- elf_hwcap |= HWCAP_CPUID;
++ cpu_set_named_feature(CPUID);
+ for (; hwcaps->matches; hwcaps++)
+ if (hwcaps->matches(hwcaps, cpucap_default_scope(hwcaps)))
+ cap_set_elf_hwcap(hwcaps);
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index 005d88db1082..bfe3bb8f05fe 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -164,7 +164,7 @@ static int c_show(struct seq_file *m, void *v)
+ #endif /* CONFIG_AARCH32_EL0 */
+ } else {
+ for (j = 0; hwcap_str[j]; j++)
+- if (elf_hwcap & (1 << j))
++ if (cpu_have_feature(j))
+ seq_printf(m, " %s", hwcap_str[j]);
+ }
+ seq_puts(m, "\n");
+diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
+index bb048144c3bd..6972de5681ec 100644
+--- a/arch/arm64/kernel/fpsimd.c
++++ b/arch/arm64/kernel/fpsimd.c
+@@ -1302,14 +1302,14 @@ static inline void fpsimd_hotplug_init(void) { }
+ */
+ static int __init fpsimd_init(void)
+ {
+- if (elf_hwcap & HWCAP_FP) {
++ if (cpu_have_named_feature(FP)) {
+ fpsimd_pm_init();
+ fpsimd_hotplug_init();
+ } else {
+ pr_notice("Floating-point is not implemented\n");
+ }
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ pr_notice("Advanced SIMD is not implemented\n");
+
+ return sve_sysctl_init();
+diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
+index 58863fd9c91b..fbfc81932dea 100644
+--- a/drivers/clocksource/arm_arch_timer.c
++++ b/drivers/clocksource/arm_arch_timer.c
+@@ -825,7 +825,11 @@ static void arch_timer_evtstrm_enable(int divider)
+ cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT)
+ | ARCH_TIMER_VIRT_EVT_EN;
+ arch_timer_set_cntkctl(cntkctl);
++#ifdef CONFIG_ARM64
++ cpu_set_named_feature(EVTSTRM);
++#else
+ elf_hwcap |= HWCAP_EVTSTRM;
++#endif
+ #ifdef CONFIG_AARCH32_EL0
+ a32_elf_hwcap |= COMPAT_HWCAP_EVTSTRM;
+ #endif
+@@ -1059,7 +1063,11 @@ static int arch_timer_cpu_pm_notify(struct notifier_block *self,
+ } else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) {
+ arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
+
++#ifdef CONFIG_ARM64
++ if (cpu_have_named_feature(EVTSTRM))
++#else
+ if (elf_hwcap & HWCAP_EVTSTRM)
++#endif
+ cpumask_set_cpu(smp_processor_id(), &evtstrm_available);
+ }
+ return NOTIFY_OK;
+--
+2.25.1
+
diff --git a/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch b/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
new file mode 100644
index 000000000000..45f709f3fab0
--- /dev/null
+++ b/patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
@@ -0,0 +1,275 @@
+From 2ba00283ddd367afa75f72e3b4de15f80b4a97a7 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Thu, 18 Apr 2019 18:41:38 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 2/4] arm64: Expose SVE2 features for
+ userspace
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+This patch provides support for reporting the presence of SVE2 and
+its optional features to userspace.
+
+This will also enable visibility of SVE2 for guests, when KVM
+support for SVE-enabled guests is available.
+
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ arch/arm64/include/asm/hwcap.h
+ arch/arm64/include/uapi/asm/hwcap.h
+ arch/arm64/kernel/cpuinfo.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/cpu-feature-registers.txt | 16 +++++++++++++
+ Documentation/arm64/elf_hwcaps.txt | 24 +++++++++++++++++++
+ Documentation/arm64/sve.txt | 17 +++++++++++++
+ arch/arm64/Kconfig | 3 +++
+ arch/arm64/include/asm/hwcap.h | 6 +++++
+ arch/arm64/include/asm/sysreg.h | 14 +++++++++++
+ arch/arm64/include/uapi/asm/hwcap.h | 10 ++++++++
+ arch/arm64/kernel/cpufeature.c | 17 ++++++++++++-
+ arch/arm64/kernel/cpuinfo.c | 10 ++++++++
+ 9 files changed, 116 insertions(+), 1 deletion(-)
+
+diff --git a/Documentation/arm64/cpu-feature-registers.txt b/Documentation/arm64/cpu-feature-registers.txt
+index 7964f03846b1..fcd2e1deb886 100644
+--- a/Documentation/arm64/cpu-feature-registers.txt
++++ b/Documentation/arm64/cpu-feature-registers.txt
+@@ -201,6 +201,22 @@ infrastructure:
+ | AT | [35-32] | y |
+ x--------------------------------------------------x
+
++ 6) ID_AA64ZFR0_EL1 - SVE feature ID register 0
++
++ x--------------------------------------------------x
++ | Name | bits | visible |
++ |--------------------------------------------------|
++ | SM4 | [43-40] | y |
++ |--------------------------------------------------|
++ | SHA3 | [35-32] | y |
++ |--------------------------------------------------|
++ | BitPerm | [19-16] | y |
++ |--------------------------------------------------|
++ | AES | [7-4] | y |
++ |--------------------------------------------------|
++ | SVEVer | [3-0] | y |
++ x--------------------------------------------------x
++
+ Appendix I: Example
+ ---------------------------
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 186feb16e2f2..e2ce14dfccf2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -159,6 +159,30 @@ HWCAP_SVE
+
+ Functionality implied by ID_AA64PFR0_EL1.SVE == 0b0001.
+
++HWCAP2_SVE2
++
++ Functionality implied by ID_AA64ZFR0_EL1.SVEVer == 0b0001.
++
++HWCAP2_SVEAES
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0001.
++
++HWCAP2_SVEPMULL
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0010.
++
++HWCAP2_SVEBITPERM
++
++ Functionality implied by ID_AA64ZFR0_EL1.BitPerm == 0b0001.
++
++HWCAP2_SVESHA3
++
++ Functionality implied by ID_AA64ZFR0_EL1.SHA3 == 0b0001.
++
++HWCAP2_SVESM4
++
++ Functionality implied by ID_AA64ZFR0_EL1.SM4 == 0b0001.
++
+ HWCAP_ASIMDFHM
+
+ Functionality implied by ID_AA64ISAR0_EL1.FHM == 0b0001.
+diff --git a/Documentation/arm64/sve.txt b/Documentation/arm64/sve.txt
+index 2001d84384ca..5689fc9a976a 100644
+--- a/Documentation/arm64/sve.txt
++++ b/Documentation/arm64/sve.txt
+@@ -34,6 +34,23 @@ model features for SVE is included in Appendix A.
+ following sections: software that needs to verify that those interfaces are
+ present must check for HWCAP_SVE instead.
+
++* On hardware that supports the SVE2 extensions, HWCAP2_SVE2 will also
++ be reported in the AT_HWCAP2 aux vector entry. In addition to this,
++ optional extensions to SVE2 may be reported by the presence of:
++
++ HWCAP2_SVE2
++ HWCAP2_SVEAES
++ HWCAP2_SVEPMULL
++ HWCAP2_SVEBITPERM
++ HWCAP2_SVESHA3
++ HWCAP2_SVESM4
++
++ This list may be extended over time as the SVE architecture evolves.
++
++ These extensions are also reported via the CPU ID register ID_AA64ZFR0_EL1,
++ which userspace can read using an MRS instruction. See elf_hwcaps.txt and
++ cpu-feature-registers.txt for details.
++
+ * Debuggers should restrict themselves to interacting with the target via the
+ NT_ARM_SVE regset. The recommended way of detecting support for this regset
+ is to connect to a target process first and then attempt a
+diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
+index 88b8031a93b2..f7398a1904a2 100644
+--- a/arch/arm64/Kconfig
++++ b/arch/arm64/Kconfig
+@@ -1316,6 +1316,9 @@ config ARM64_SVE
+
+ To enable use of this extension on CPUs that implement it, say Y.
+
++ On CPUs that support the SVE2 extensions, this option will enable
++ those too.
++
+ Note that for architectural reasons, firmware _must_ implement SVE
+ support when running on SVE capable hardware. The required support
+ is present in:
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 458ff2d7ece3..08315a3bf387 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -85,6 +85,12 @@
+ #define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
+
+ #define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++#define KERNEL_HWCAP_SVE2 __khwcap2_feature(SVE2)
++#define KERNEL_HWCAP_SVEAES __khwcap2_feature(SVEAES)
++#define KERNEL_HWCAP_SVEPMULL __khwcap2_feature(SVEPMULL)
++#define KERNEL_HWCAP_SVEBITPERM __khwcap2_feature(SVEBITPERM)
++#define KERNEL_HWCAP_SVESHA3 __khwcap2_feature(SVESHA3)
++#define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4)
+
+ /*
+ * This yields a mask that user programs can use to figure out what
+diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
+index 0fd51d253648..69618e602ed8 100644
+--- a/arch/arm64/include/asm/sysreg.h
++++ b/arch/arm64/include/asm/sysreg.h
+@@ -564,6 +564,20 @@
+ #define ID_AA64PFR1_SSBS_PSTATE_ONLY 1
+ #define ID_AA64PFR1_SSBS_PSTATE_INSNS 2
+
++/* id_aa64zfr0 */
++#define ID_AA64ZFR0_SM4_SHIFT 40
++#define ID_AA64ZFR0_SHA3_SHIFT 32
++#define ID_AA64ZFR0_BITPERM_SHIFT 16
++#define ID_AA64ZFR0_AES_SHIFT 4
++#define ID_AA64ZFR0_SVEVER_SHIFT 0
++
++#define ID_AA64ZFR0_SM4 0x1
++#define ID_AA64ZFR0_SHA3 0x1
++#define ID_AA64ZFR0_BITPERM 0x1
++#define ID_AA64ZFR0_AES 0x1
++#define ID_AA64ZFR0_AES_PMULL 0x2
++#define ID_AA64ZFR0_SVEVER_SVE2 0x1
++
+ /* id_aa64mmfr0 */
+ #define ID_AA64MMFR0_TGRAN4_SHIFT 28
+ #define ID_AA64MMFR0_TGRAN64_SHIFT 24
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 602158a55554..fea93415b493 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -50,4 +50,14 @@
+ #define HWCAP_FLAGM (1 << 27)
+ #define HWCAP_SSBS (1 << 28)
+
++/*
++ * HWCAP2 flags - for AT_HWCAP2
++ */
++#define HWCAP2_SVE2 (1 << 1)
++#define HWCAP2_SVEAES (1 << 2)
++#define HWCAP2_SVEPMULL (1 << 3)
++#define HWCAP2_SVEBITPERM (1 << 4)
++#define HWCAP2_SVESHA3 (1 << 5)
++#define HWCAP2_SVESM4 (1 << 6)
++
+ #endif /* _UAPI__ASM_HWCAP_H */
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 3a0e7e10f2d7..4f384bbd86c7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -183,6 +183,15 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ ARM64_FTR_END,
+ };
+
++static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_END,
++};
++
+ static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
+ /*
+ * We already refuse to boot CPUs that don't support our configured
+@@ -399,7 +408,7 @@ static const struct __ftr_reg_entry {
+ /* Op1 = 0, CRn = 0, CRm = 4 */
+ ARM64_FTR_REG(SYS_ID_AA64PFR0_EL1, ftr_id_aa64pfr0),
+ ARM64_FTR_REG(SYS_ID_AA64PFR1_EL1, ftr_id_aa64pfr1),
+- ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_raz),
++ ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_id_aa64zfr0),
+
+ /* Op1 = 0, CRn = 0, CRm = 5 */
+ ARM64_FTR_REG(SYS_ID_AA64DFR0_EL1, ftr_id_aa64dfr0),
+@@ -1580,6 +1589,12 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SVEVER_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SVEVER_SVE2, CAP_HWCAP, KERNEL_HWCAP_SVE2),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES, CAP_HWCAP, KERNEL_HWCAP_SVEAES),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES_PMULL, CAP_HWCAP, KERNEL_HWCAP_SVEPMULL),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_BITPERM_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_BITPERM, CAP_HWCAP, KERNEL_HWCAP_SVEBITPERM),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SHA3_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SHA3, CAP_HWCAP, KERNEL_HWCAP_SVESHA3),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SM4_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SM4, CAP_HWCAP, KERNEL_HWCAP_SVESM4),
+ #endif
+ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index bfe3bb8f05fe..c8e4ddd23f0c 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -82,6 +82,16 @@ static const char *const hwcap_str[] = {
+ "ilrcpc",
+ "flagm",
+ "ssbs",
++ "sb",
++ "paca",
++ "pacg",
++ "dcpodp",
++ "sve2",
++ "sveaes",
++ "svepmull",
++ "svebitperm",
++ "svesha3",
++ "svesm4",
+ NULL
+ };
+
+--
+2.25.1
+
diff --git a/patches/0044-Revert-perf-hisi-Add-support-for-HiSilicon-SoC-LPDDR.patch b/patches/0099-Expose-SVE2-features-for-userspace.patch
similarity index 100%
rename from patches/0044-Revert-perf-hisi-Add-support-for-HiSilicon-SoC-LPDDR.patch
rename to patches/0099-Expose-SVE2-features-for-userspace.patch
diff --git a/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch b/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
new file mode 100644
index 000000000000..7df40531adda
--- /dev/null
+++ b/patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
@@ -0,0 +1,67 @@
+From 515c2917ae3bc768e8793dac6b27ea4dff36b40c Mon Sep 17 00:00:00 2001
+From: Julien Grall <julien.grall(a)arm.com>
+Date: Mon, 14 Oct 2019 11:21:13 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 4/4] arm64: cpufeature: Treat
+ ID_AA64ZFR0_EL1 as RAZ when SVE is not enabled
+
+mainline inclusion
+from mainline-v5.4-rc4
+commit ec52c7134b1fcef0edfc56d55072fd4f261ef198
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+If CONFIG_ARM64_SVE=n then we fail to report ID_AA64ZFR0_EL1 as 0 when
+read by userspace, despite being required by the architecture. Although
+this is theoretically a change in ABI, userspace will first check for
+the presence of SVE via the HWCAP or the ID_AA64PFR0_EL1.SVE field
+before probing the ID_AA64ZFR0_EL1 register. Given that these are
+reported correctly for this configuration, we can safely tighten up the
+current behaviour.
+
+Ensure ID_AA64ZFR0_EL1 is treated as RAZ when CONFIG_ARM64_SVE=n.
+
+Signed-off-by: Julien Grall <julien.grall(a)arm.com>
+Reviewed-by: Suzuki K Poulose <suzuki.poulose(a)arm.com>
+Reviewed-by: Mark Rutland <mark.rutland(a)arm.com>
+Reviewed-by: Dave Martin <dave.martin(a)arm.com>
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Will Deacon <will(a)kernel.org>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 8e7473df2660..98a8b2703f84 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -184,11 +184,16 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ };
+
+ static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
+ ARM64_FTR_END,
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index 987dcc1adad1..acdead12c1e2 100644
--- a/series.conf
+++ b/series.conf
@@ -98,3 +98,7 @@ patches/0093-Revert-perf-smmuv3_pmu-Enable-HiSilicon-Erratum-1620.patch
patches/0094-perf-smmuv3-Enable-HiSilicon-Erratum-162001800-quirk.patch
patches/0095-perf-smmuv3-Enable-HiSilicon-Erratum-162001900-quirk.patch
patches/0096-perf-smmuv3-Add-MODULE_ALIAS-for-module-auto-loading.patch
+patches/0097-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
+patches/0098-arm64-Expose-SVE2-features-for-userspace.patch
+patches/0099-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
+patches/0100-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
--
2.25.1
2
1
---
kernel.spec | 8 +-
...rm64-HWCAP-add-support-for-AT_HWCAP2.patch | 463 ++++++++++++++++++
...4-Expose-SVE2-features-for-userspace.patch | 275 +++++++++++
...-Fix-missing-ZFR0-in-__read_sysreg_b.patch | 55 +++
...-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch | 67 +++
series.conf | 4 +
6 files changed, 871 insertions(+), 1 deletion(-)
create mode 100644 patches/0042-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
create mode 100644 patches/0043-arm64-Expose-SVE2-features-for-userspace.patch
create mode 100644 patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
create mode 100644 patches/0045-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
diff --git a/kernel.spec b/kernel.spec
index 1a8ad37c95d8..e3d408f7b6b4 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -32,7 +32,7 @@
Name: kernel
Version: 4.19.90
-Release: %{hulkrelease}.0229
+Release: %{hulkrelease}.0230
Summary: Linux Kernel
License: GPLv2
URL: http://www.kernel.org/
@@ -832,6 +832,12 @@ fi
%changelog
+* Wed Nov 1 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2310.4.0.0230
+- arm64: HWCAP: add support for AT_HWCAP2
+- arm64: Expose SVE2 features for userspace
+- arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding()
+- arm64: cpufeature: Treat ID_AA64ZFR0_EL1 as RAZ when SVE is not enabled
+
* Tue Oct 31 2023 Yu Liao <liaoyu15(a)huawei.com> - 4.19.90-2310.4.0.0229
- add new line at the end of series.conf
diff --git a/patches/0042-arm64-HWCAP-add-support-for-AT_HWCAP2.patch b/patches/0042-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
new file mode 100644
index 000000000000..46effba895fb
--- /dev/null
+++ b/patches/0042-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
@@ -0,0 +1,463 @@
+From a97497b283894653e53f7eb83b5825f5564d1614 Mon Sep 17 00:00:00 2001
+From: Andrew Murray <andrew.murray(a)arm.com>
+Date: Tue, 9 Apr 2019 10:52:40 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 1/4] arm64: HWCAP: add support for
+ AT_HWCAP2
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+As we will exhaust the first 32 bits of AT_HWCAP let's start
+exposing AT_HWCAP2 to userspace to give us up to 64 caps.
+
+Whilst it's possible to use the remaining 32 bits of AT_HWCAP, we
+prefer to expand into AT_HWCAP2 in order to provide a consistent
+view to userspace between ILP32 and LP64. However internal to the
+kernel we prefer to continue to use the full space of elf_hwcap.
+
+To reduce complexity and allow for future expansion, we now
+represent hwcaps in the kernel as ordinals and use a
+KERNEL_HWCAP_ prefix. This allows us to support automatic feature
+based module loading for all our hwcaps.
+
+We introduce cpu_set_feature to set hwcaps which complements the
+existing cpu_have_feature helper. These helpers allow us to clean
+up existing direct uses of elf_hwcap and reduce any future effort
+required to move beyond 64 caps.
+
+For convenience we also introduce cpu_{have,set}_named_feature which
+makes use of the cpu_feature macro to allow providing a hwcap name
+without a {KERNEL_}HWCAP_ prefix.
+
+Signed-off-by: Andrew Murray <andrew.murray(a)arm.com>
+[will: use const_ilog2() and tweak documentation]
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ Documentation/arm64/elf_hwcaps.txt
+ arch/arm64/crypto/chacha-neon-glue.c
+ arch/arm64/crypto/crct10dif-ce-glue.c
+ arch/arm64/crypto/ghash-ce-glue.c
+ arch/arm64/crypto/nhpoly1305-neon-glue.c
+ arch/arm64/kernel/cpufeature.c
+ drivers/clocksource/arm_arch_timer.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/elf_hwcaps.txt | 13 ++++--
+ arch/arm64/crypto/aes-ce-ccm-glue.c | 2 +-
+ arch/arm64/crypto/aes-neonbs-glue.c | 2 +-
+ arch/arm64/crypto/chacha20-neon-glue.c | 2 +-
+ arch/arm64/crypto/ghash-ce-glue.c | 6 +--
+ arch/arm64/crypto/sha256-glue.c | 4 +-
+ arch/arm64/include/asm/cpufeature.h | 22 +++++-----
+ arch/arm64/include/asm/hwcap.h | 49 ++++++++++++++++++++-
+ arch/arm64/include/uapi/asm/hwcap.h | 2 +-
+ arch/arm64/kernel/cpufeature.c | 60 +++++++++++++-------------
+ arch/arm64/kernel/cpuinfo.c | 2 +-
+ arch/arm64/kernel/fpsimd.c | 4 +-
+ drivers/clocksource/arm_arch_timer.c | 8 ++++
+ 13 files changed, 120 insertions(+), 56 deletions(-)
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 6feaffe90e22..186feb16e2f2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -13,9 +13,9 @@ architected discovery mechanism available to userspace code at EL0. The
+ kernel exposes the presence of these features to userspace through a set
+ of flags called hwcaps, exposed in the auxilliary vector.
+
+-Userspace software can test for features by acquiring the AT_HWCAP entry
+-of the auxilliary vector, and testing whether the relevant flags are
+-set, e.g.
++Userspace software can test for features by acquiring the AT_HWCAP or
++AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
++flags are set, e.g.
+
+ bool floating_point_is_present(void)
+ {
+@@ -182,3 +182,10 @@ HWCAP_FLAGM
+ HWCAP_SSBS
+
+ Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.
++
++
++4. Unused AT_HWCAP bits
++-----------------------
++
++For interoperation with userspace, the kernel guarantees that bits 62
++and 63 of AT_HWCAP will always be returned as 0.
+diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
+index 5fc6f51908fd..036ea77f83bc 100644
+--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
++++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
+@@ -372,7 +372,7 @@ static struct aead_alg ccm_aes_alg = {
+
+ static int __init aes_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_AES))
++ if (!cpu_have_named_feature(AES))
+ return -ENODEV;
+ return crypto_register_aead(&ccm_aes_alg);
+ }
+diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
+index 5cc248967387..742359801559 100644
+--- a/arch/arm64/crypto/aes-neonbs-glue.c
++++ b/arch/arm64/crypto/aes-neonbs-glue.c
+@@ -442,7 +442,7 @@ static int __init aes_init(void)
+ int err;
+ int i;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
+diff --git a/arch/arm64/crypto/chacha20-neon-glue.c b/arch/arm64/crypto/chacha20-neon-glue.c
+index 727579c93ded..bb3314905bee 100644
+--- a/arch/arm64/crypto/chacha20-neon-glue.c
++++ b/arch/arm64/crypto/chacha20-neon-glue.c
+@@ -114,7 +114,7 @@ static struct skcipher_alg alg = {
+
+ static int __init chacha20_simd_mod_init(void)
+ {
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+ return crypto_register_skcipher(&alg);
+diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c
+index 1ed227bf6106..cd9d743cb40f 100644
+--- a/arch/arm64/crypto/ghash-ce-glue.c
++++ b/arch/arm64/crypto/ghash-ce-glue.c
+@@ -648,10 +648,10 @@ static int __init ghash_ce_mod_init(void)
+ {
+ int ret;
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ return -ENODEV;
+
+- if (elf_hwcap & HWCAP_PMULL)
++ if (cpu_have_named_feature(PMULL))
+ pmull_ghash_update = pmull_ghash_update_p64;
+
+ else
+@@ -661,7 +661,7 @@ static int __init ghash_ce_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_PMULL) {
++ if (cpu_have_named_feature(PMULL)) {
+ ret = crypto_register_aead(&gcm_aes_alg);
+ if (ret)
+ crypto_unregister_shash(&ghash_alg);
+diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
+index 4aedeaefd61f..0cccdb9cc2c0 100644
+--- a/arch/arm64/crypto/sha256-glue.c
++++ b/arch/arm64/crypto/sha256-glue.c
+@@ -173,7 +173,7 @@ static int __init sha256_mod_init(void)
+ if (ret)
+ return ret;
+
+- if (elf_hwcap & HWCAP_ASIMD) {
++ if (cpu_have_named_feature(ASIMD)) {
+ ret = crypto_register_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ if (ret)
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+@@ -183,7 +183,7 @@ static int __init sha256_mod_init(void)
+
+ static void __exit sha256_mod_fini(void)
+ {
+- if (elf_hwcap & HWCAP_ASIMD)
++ if (cpu_have_named_feature(ASIMD))
+ crypto_unregister_shashes(neon_algs, ARRAY_SIZE(neon_algs));
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+ }
+diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
+index ffb0a1ec0088..eef5a9c9b823 100644
+--- a/arch/arm64/include/asm/cpufeature.h
++++ b/arch/arm64/include/asm/cpufeature.h
+@@ -14,15 +14,8 @@
+ #include <asm/hwcap.h>
+ #include <asm/sysreg.h>
+
+-/*
+- * In the arm64 world (as in the ARM world), elf_hwcap is used both internally
+- * in the kernel and for user space to keep track of which optional features
+- * are supported by the current system. So let's map feature 'x' to HWCAP_x.
+- * Note that HWCAP_x constants are bit fields so we need to take the log.
+- */
+-
+-#define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap))
+-#define cpu_feature(x) ilog2(HWCAP_ ## x)
++#define MAX_CPU_FEATURES 64
++#define cpu_feature(x) KERNEL_HWCAP_ ## x
+
+ #ifndef __ASSEMBLY__
+
+@@ -372,10 +365,19 @@ extern bool set_cap_spectre_bhb;
+
+ bool this_cpu_has_cap(unsigned int cap);
+
++static inline void cpu_set_feature(unsigned int num)
++{
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ elf_hwcap |= BIT(num);
++}
++#define cpu_set_named_feature(name) cpu_set_feature(cpu_feature(name))
++
+ static inline bool cpu_have_feature(unsigned int num)
+ {
+- return elf_hwcap & (1UL << num);
++ WARN_ON(num >= MAX_CPU_FEATURES);
++ return elf_hwcap & BIT(num);
+ }
++#define cpu_have_named_feature(name) cpu_have_feature(cpu_feature(name))
+
+ /* System capability check for constant caps */
+ static __always_inline bool __cpus_have_const_cap(int num)
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 428b745b5386..458ff2d7ece3 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -40,11 +40,58 @@
+ #define COMPAT_HWCAP2_CRC32 (1 << 4)
+
+ #ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <linux/log2.h>
++
++/*
++ * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
++ * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
++ * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
++ * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
++ *
++ * Hwcaps should be set and tested within the kernel via the
++ * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
++ * of KERNEL_HWCAP_{feature}.
++ */
++#define __khwcap_feature(x) const_ilog2(HWCAP_ ## x)
++#define KERNEL_HWCAP_FP __khwcap_feature(FP)
++#define KERNEL_HWCAP_ASIMD __khwcap_feature(ASIMD)
++#define KERNEL_HWCAP_EVTSTRM __khwcap_feature(EVTSTRM)
++#define KERNEL_HWCAP_AES __khwcap_feature(AES)
++#define KERNEL_HWCAP_PMULL __khwcap_feature(PMULL)
++#define KERNEL_HWCAP_SHA1 __khwcap_feature(SHA1)
++#define KERNEL_HWCAP_SHA2 __khwcap_feature(SHA2)
++#define KERNEL_HWCAP_CRC32 __khwcap_feature(CRC32)
++#define KERNEL_HWCAP_ATOMICS __khwcap_feature(ATOMICS)
++#define KERNEL_HWCAP_FPHP __khwcap_feature(FPHP)
++#define KERNEL_HWCAP_ASIMDHP __khwcap_feature(ASIMDHP)
++#define KERNEL_HWCAP_CPUID __khwcap_feature(CPUID)
++#define KERNEL_HWCAP_ASIMDRDM __khwcap_feature(ASIMDRDM)
++#define KERNEL_HWCAP_JSCVT __khwcap_feature(JSCVT)
++#define KERNEL_HWCAP_FCMA __khwcap_feature(FCMA)
++#define KERNEL_HWCAP_LRCPC __khwcap_feature(LRCPC)
++#define KERNEL_HWCAP_DCPOP __khwcap_feature(DCPOP)
++#define KERNEL_HWCAP_SHA3 __khwcap_feature(SHA3)
++#define KERNEL_HWCAP_SM3 __khwcap_feature(SM3)
++#define KERNEL_HWCAP_SM4 __khwcap_feature(SM4)
++#define KERNEL_HWCAP_ASIMDDP __khwcap_feature(ASIMDDP)
++#define KERNEL_HWCAP_SHA512 __khwcap_feature(SHA512)
++#define KERNEL_HWCAP_SVE __khwcap_feature(SVE)
++#define KERNEL_HWCAP_ASIMDFHM __khwcap_feature(ASIMDFHM)
++#define KERNEL_HWCAP_DIT __khwcap_feature(DIT)
++#define KERNEL_HWCAP_USCAT __khwcap_feature(USCAT)
++#define KERNEL_HWCAP_ILRCPC __khwcap_feature(ILRCPC)
++#define KERNEL_HWCAP_FLAGM __khwcap_feature(FLAGM)
++#define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
++
++#define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++
+ /*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports.
+ */
+-#define ELF_HWCAP (elf_hwcap)
++#define ELF_HWCAP lower_32_bits(elf_hwcap)
++#define ELF_HWCAP2 upper_32_bits(elf_hwcap)
+
+ #ifdef CONFIG_AARCH32_EL0
+ extern unsigned int a32_elf_hwcap, a32_elf_hwcap2;
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 2bcd6e4f3474..602158a55554 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -18,7 +18,7 @@
+ #define _UAPI__ASM_HWCAP_H
+
+ /*
+- * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
++ * HWCAP flags - for AT_HWCAP
+ */
+ #define HWCAP_FP (1 << 0)
+ #define HWCAP_ASIMD (1 << 1)
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 1c93cc3f7692..3a0e7e10f2d7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -1553,35 +1553,35 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
+ }
+
+ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_PMULL),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_AES),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA1),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA2),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_SHA512),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_CRC32),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ATOMICS),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDRDM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SHA3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM3),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SM4),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDDP),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_ASIMDFHM),
+- HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FLAGM),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_FP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_FPHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP),
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_DIT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_DCPOP),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_JSCVT),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FCMA),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_LRCPC),
+- HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, HWCAP_ILRCPC),
+- HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_USCAT),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_PMULL),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_AES_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_AES),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA1_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA1),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA2),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA2_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_SHA512),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_CRC32_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_CRC32),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_ATOMICS_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ATOMICS),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_RDM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDRDM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SHA3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SHA3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM3_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM3),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_SM4_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_SM4),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_DP_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDDP),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_FHM_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDFHM),
++ HWCAP_CAP(SYS_ID_AA64ISAR0_EL1, ID_AA64ISAR0_TS_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FLAGM),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_FP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FPHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_ASIMD),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDHP),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_DIT_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DIT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_DPB_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DCPOP),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_JSCVT),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FCMA),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_LRCPC),
++ HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_ILRCPC),
++ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+- HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
+ #endif
+- HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, HWCAP_SSBS),
++ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+ };
+
+@@ -1627,7 +1627,7 @@ static void __init cap_set_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ {
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- elf_hwcap |= cap->hwcap;
++ cpu_set_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1650,7 +1650,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+
+ switch (cap->hwcap_type) {
+ case CAP_HWCAP:
+- rc = (elf_hwcap & cap->hwcap) != 0;
++ rc = cpu_have_feature(cap->hwcap);
+ break;
+ #ifdef CONFIG_AARCH32_EL0
+ case CAP_COMPAT_HWCAP:
+@@ -1671,7 +1671,7 @@ static bool cpus_have_elf_hwcap(const struct arm64_cpu_capabilities *cap)
+ static void __init setup_elf_hwcaps(const struct arm64_cpu_capabilities *hwcaps)
+ {
+ /* We support emulation of accesses to CPU ID feature registers */
+- elf_hwcap |= HWCAP_CPUID;
++ cpu_set_named_feature(CPUID);
+ for (; hwcaps->matches; hwcaps++)
+ if (hwcaps->matches(hwcaps, cpucap_default_scope(hwcaps)))
+ cap_set_elf_hwcap(hwcaps);
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index 005d88db1082..bfe3bb8f05fe 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -164,7 +164,7 @@ static int c_show(struct seq_file *m, void *v)
+ #endif /* CONFIG_AARCH32_EL0 */
+ } else {
+ for (j = 0; hwcap_str[j]; j++)
+- if (elf_hwcap & (1 << j))
++ if (cpu_have_feature(j))
+ seq_printf(m, " %s", hwcap_str[j]);
+ }
+ seq_puts(m, "\n");
+diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
+index bb048144c3bd..6972de5681ec 100644
+--- a/arch/arm64/kernel/fpsimd.c
++++ b/arch/arm64/kernel/fpsimd.c
+@@ -1302,14 +1302,14 @@ static inline void fpsimd_hotplug_init(void) { }
+ */
+ static int __init fpsimd_init(void)
+ {
+- if (elf_hwcap & HWCAP_FP) {
++ if (cpu_have_named_feature(FP)) {
+ fpsimd_pm_init();
+ fpsimd_hotplug_init();
+ } else {
+ pr_notice("Floating-point is not implemented\n");
+ }
+
+- if (!(elf_hwcap & HWCAP_ASIMD))
++ if (!cpu_have_named_feature(ASIMD))
+ pr_notice("Advanced SIMD is not implemented\n");
+
+ return sve_sysctl_init();
+diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
+index 58863fd9c91b..fbfc81932dea 100644
+--- a/drivers/clocksource/arm_arch_timer.c
++++ b/drivers/clocksource/arm_arch_timer.c
+@@ -825,7 +825,11 @@ static void arch_timer_evtstrm_enable(int divider)
+ cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT)
+ | ARCH_TIMER_VIRT_EVT_EN;
+ arch_timer_set_cntkctl(cntkctl);
++#ifdef CONFIG_ARM64
++ cpu_set_named_feature(EVTSTRM);
++#else
+ elf_hwcap |= HWCAP_EVTSTRM;
++#endif
+ #ifdef CONFIG_AARCH32_EL0
+ a32_elf_hwcap |= COMPAT_HWCAP_EVTSTRM;
+ #endif
+@@ -1059,7 +1063,11 @@ static int arch_timer_cpu_pm_notify(struct notifier_block *self,
+ } else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) {
+ arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
+
++#ifdef CONFIG_ARM64
++ if (cpu_have_named_feature(EVTSTRM))
++#else
+ if (elf_hwcap & HWCAP_EVTSTRM)
++#endif
+ cpumask_set_cpu(smp_processor_id(), &evtstrm_available);
+ }
+ return NOTIFY_OK;
+--
+2.25.1
+
diff --git a/patches/0043-arm64-Expose-SVE2-features-for-userspace.patch b/patches/0043-arm64-Expose-SVE2-features-for-userspace.patch
new file mode 100644
index 000000000000..45f709f3fab0
--- /dev/null
+++ b/patches/0043-arm64-Expose-SVE2-features-for-userspace.patch
@@ -0,0 +1,275 @@
+From 2ba00283ddd367afa75f72e3b4de15f80b4a97a7 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Thu, 18 Apr 2019 18:41:38 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 2/4] arm64: Expose SVE2 features for
+ userspace
+
+mainline inclusion
+from mainline-v5.2-rc1
+commit 06a916feca2b262ab0c1a2aeb68882f4b1108a07
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+This patch provides support for reporting the presence of SVE2 and
+its optional features to userspace.
+
+This will also enable visibility of SVE2 for guests, when KVM
+support for SVE-enabled guests is available.
+
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+
+Conflicts:
+ arch/arm64/include/asm/hwcap.h
+ arch/arm64/include/uapi/asm/hwcap.h
+ arch/arm64/kernel/cpuinfo.c
+
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ Documentation/arm64/cpu-feature-registers.txt | 16 +++++++++++++
+ Documentation/arm64/elf_hwcaps.txt | 24 +++++++++++++++++++
+ Documentation/arm64/sve.txt | 17 +++++++++++++
+ arch/arm64/Kconfig | 3 +++
+ arch/arm64/include/asm/hwcap.h | 6 +++++
+ arch/arm64/include/asm/sysreg.h | 14 +++++++++++
+ arch/arm64/include/uapi/asm/hwcap.h | 10 ++++++++
+ arch/arm64/kernel/cpufeature.c | 17 ++++++++++++-
+ arch/arm64/kernel/cpuinfo.c | 10 ++++++++
+ 9 files changed, 116 insertions(+), 1 deletion(-)
+
+diff --git a/Documentation/arm64/cpu-feature-registers.txt b/Documentation/arm64/cpu-feature-registers.txt
+index 7964f03846b1..fcd2e1deb886 100644
+--- a/Documentation/arm64/cpu-feature-registers.txt
++++ b/Documentation/arm64/cpu-feature-registers.txt
+@@ -201,6 +201,22 @@ infrastructure:
+ | AT | [35-32] | y |
+ x--------------------------------------------------x
+
++ 6) ID_AA64ZFR0_EL1 - SVE feature ID register 0
++
++ x--------------------------------------------------x
++ | Name | bits | visible |
++ |--------------------------------------------------|
++ | SM4 | [43-40] | y |
++ |--------------------------------------------------|
++ | SHA3 | [35-32] | y |
++ |--------------------------------------------------|
++ | BitPerm | [19-16] | y |
++ |--------------------------------------------------|
++ | AES | [7-4] | y |
++ |--------------------------------------------------|
++ | SVEVer | [3-0] | y |
++ x--------------------------------------------------x
++
+ Appendix I: Example
+ ---------------------------
+
+diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
+index 186feb16e2f2..e2ce14dfccf2 100644
+--- a/Documentation/arm64/elf_hwcaps.txt
++++ b/Documentation/arm64/elf_hwcaps.txt
+@@ -159,6 +159,30 @@ HWCAP_SVE
+
+ Functionality implied by ID_AA64PFR0_EL1.SVE == 0b0001.
+
++HWCAP2_SVE2
++
++ Functionality implied by ID_AA64ZFR0_EL1.SVEVer == 0b0001.
++
++HWCAP2_SVEAES
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0001.
++
++HWCAP2_SVEPMULL
++
++ Functionality implied by ID_AA64ZFR0_EL1.AES == 0b0010.
++
++HWCAP2_SVEBITPERM
++
++ Functionality implied by ID_AA64ZFR0_EL1.BitPerm == 0b0001.
++
++HWCAP2_SVESHA3
++
++ Functionality implied by ID_AA64ZFR0_EL1.SHA3 == 0b0001.
++
++HWCAP2_SVESM4
++
++ Functionality implied by ID_AA64ZFR0_EL1.SM4 == 0b0001.
++
+ HWCAP_ASIMDFHM
+
+ Functionality implied by ID_AA64ISAR0_EL1.FHM == 0b0001.
+diff --git a/Documentation/arm64/sve.txt b/Documentation/arm64/sve.txt
+index 2001d84384ca..5689fc9a976a 100644
+--- a/Documentation/arm64/sve.txt
++++ b/Documentation/arm64/sve.txt
+@@ -34,6 +34,23 @@ model features for SVE is included in Appendix A.
+ following sections: software that needs to verify that those interfaces are
+ present must check for HWCAP_SVE instead.
+
++* On hardware that supports the SVE2 extensions, HWCAP2_SVE2 will also
++ be reported in the AT_HWCAP2 aux vector entry. In addition to this,
++ optional extensions to SVE2 may be reported by the presence of:
++
++ HWCAP2_SVE2
++ HWCAP2_SVEAES
++ HWCAP2_SVEPMULL
++ HWCAP2_SVEBITPERM
++ HWCAP2_SVESHA3
++ HWCAP2_SVESM4
++
++ This list may be extended over time as the SVE architecture evolves.
++
++ These extensions are also reported via the CPU ID register ID_AA64ZFR0_EL1,
++ which userspace can read using an MRS instruction. See elf_hwcaps.txt and
++ cpu-feature-registers.txt for details.
++
+ * Debuggers should restrict themselves to interacting with the target via the
+ NT_ARM_SVE regset. The recommended way of detecting support for this regset
+ is to connect to a target process first and then attempt a
+diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
+index 88b8031a93b2..f7398a1904a2 100644
+--- a/arch/arm64/Kconfig
++++ b/arch/arm64/Kconfig
+@@ -1316,6 +1316,9 @@ config ARM64_SVE
+
+ To enable use of this extension on CPUs that implement it, say Y.
+
++ On CPUs that support the SVE2 extensions, this option will enable
++ those too.
++
+ Note that for architectural reasons, firmware _must_ implement SVE
+ support when running on SVE capable hardware. The required support
+ is present in:
+diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
+index 458ff2d7ece3..08315a3bf387 100644
+--- a/arch/arm64/include/asm/hwcap.h
++++ b/arch/arm64/include/asm/hwcap.h
+@@ -85,6 +85,12 @@
+ #define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
+
+ #define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 32)
++#define KERNEL_HWCAP_SVE2 __khwcap2_feature(SVE2)
++#define KERNEL_HWCAP_SVEAES __khwcap2_feature(SVEAES)
++#define KERNEL_HWCAP_SVEPMULL __khwcap2_feature(SVEPMULL)
++#define KERNEL_HWCAP_SVEBITPERM __khwcap2_feature(SVEBITPERM)
++#define KERNEL_HWCAP_SVESHA3 __khwcap2_feature(SVESHA3)
++#define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4)
+
+ /*
+ * This yields a mask that user programs can use to figure out what
+diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
+index 0fd51d253648..69618e602ed8 100644
+--- a/arch/arm64/include/asm/sysreg.h
++++ b/arch/arm64/include/asm/sysreg.h
+@@ -564,6 +564,20 @@
+ #define ID_AA64PFR1_SSBS_PSTATE_ONLY 1
+ #define ID_AA64PFR1_SSBS_PSTATE_INSNS 2
+
++/* id_aa64zfr0 */
++#define ID_AA64ZFR0_SM4_SHIFT 40
++#define ID_AA64ZFR0_SHA3_SHIFT 32
++#define ID_AA64ZFR0_BITPERM_SHIFT 16
++#define ID_AA64ZFR0_AES_SHIFT 4
++#define ID_AA64ZFR0_SVEVER_SHIFT 0
++
++#define ID_AA64ZFR0_SM4 0x1
++#define ID_AA64ZFR0_SHA3 0x1
++#define ID_AA64ZFR0_BITPERM 0x1
++#define ID_AA64ZFR0_AES 0x1
++#define ID_AA64ZFR0_AES_PMULL 0x2
++#define ID_AA64ZFR0_SVEVER_SVE2 0x1
++
+ /* id_aa64mmfr0 */
+ #define ID_AA64MMFR0_TGRAN4_SHIFT 28
+ #define ID_AA64MMFR0_TGRAN64_SHIFT 24
+diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
+index 602158a55554..fea93415b493 100644
+--- a/arch/arm64/include/uapi/asm/hwcap.h
++++ b/arch/arm64/include/uapi/asm/hwcap.h
+@@ -50,4 +50,14 @@
+ #define HWCAP_FLAGM (1 << 27)
+ #define HWCAP_SSBS (1 << 28)
+
++/*
++ * HWCAP2 flags - for AT_HWCAP2
++ */
++#define HWCAP2_SVE2 (1 << 1)
++#define HWCAP2_SVEAES (1 << 2)
++#define HWCAP2_SVEPMULL (1 << 3)
++#define HWCAP2_SVEBITPERM (1 << 4)
++#define HWCAP2_SVESHA3 (1 << 5)
++#define HWCAP2_SVESM4 (1 << 6)
++
+ #endif /* _UAPI__ASM_HWCAP_H */
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 3a0e7e10f2d7..4f384bbd86c7 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -183,6 +183,15 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ ARM64_FTR_END,
+ };
+
++static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_END,
++};
++
+ static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
+ /*
+ * We already refuse to boot CPUs that don't support our configured
+@@ -399,7 +408,7 @@ static const struct __ftr_reg_entry {
+ /* Op1 = 0, CRn = 0, CRm = 4 */
+ ARM64_FTR_REG(SYS_ID_AA64PFR0_EL1, ftr_id_aa64pfr0),
+ ARM64_FTR_REG(SYS_ID_AA64PFR1_EL1, ftr_id_aa64pfr1),
+- ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_raz),
++ ARM64_FTR_REG(SYS_ID_AA64ZFR0_EL1, ftr_id_aa64zfr0),
+
+ /* Op1 = 0, CRn = 0, CRm = 5 */
+ ARM64_FTR_REG(SYS_ID_AA64DFR0_EL1, ftr_id_aa64dfr0),
+@@ -1580,6 +1589,12 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
+ HWCAP_CAP(SYS_ID_AA64MMFR2_EL1, ID_AA64MMFR2_AT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_USCAT),
+ #ifdef CONFIG_ARM64_SVE
+ HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, KERNEL_HWCAP_SVE),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SVEVER_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SVEVER_SVE2, CAP_HWCAP, KERNEL_HWCAP_SVE2),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES, CAP_HWCAP, KERNEL_HWCAP_SVEAES),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_AES_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_AES_PMULL, CAP_HWCAP, KERNEL_HWCAP_SVEPMULL),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_BITPERM_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_BITPERM, CAP_HWCAP, KERNEL_HWCAP_SVEBITPERM),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SHA3_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SHA3, CAP_HWCAP, KERNEL_HWCAP_SVESHA3),
++ HWCAP_CAP(SYS_ID_AA64ZFR0_EL1, ID_AA64ZFR0_SM4_SHIFT, FTR_UNSIGNED, ID_AA64ZFR0_SM4, CAP_HWCAP, KERNEL_HWCAP_SVESM4),
+ #endif
+ HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, KERNEL_HWCAP_SSBS),
+ {},
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index bfe3bb8f05fe..c8e4ddd23f0c 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -82,6 +82,16 @@ static const char *const hwcap_str[] = {
+ "ilrcpc",
+ "flagm",
+ "ssbs",
++ "sb",
++ "paca",
++ "pacg",
++ "dcpodp",
++ "sve2",
++ "sveaes",
++ "svepmull",
++ "svebitperm",
++ "svesha3",
++ "svesm4",
+ NULL
+ };
+
+--
+2.25.1
+
diff --git a/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch b/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
new file mode 100644
index 000000000000..4ce008cecf19
--- /dev/null
+++ b/patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
@@ -0,0 +1,55 @@
+From 9f8dff634365e7bfa0c764ccd31b54a4f0992bc8 Mon Sep 17 00:00:00 2001
+From: Dave Martin <Dave.Martin(a)arm.com>
+Date: Mon, 3 Jun 2019 16:35:02 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 3/4] arm64: cpufeature: Fix missing
+ ZFR0 in __read_sysreg_by_encoding()
+
+mainline inclusion
+from mainline-v5.2-rc4
+commit 78ed70bf3a923f1965e3c19f544677d418397108
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+In commit 06a916feca2b ("arm64: Expose SVE2 features for
+userspace"), new hwcaps are added that are detected via fields in
+the SVE-specific ID register ID_AA64ZFR0_EL1.
+
+In order to check compatibility of secondary cpus with the hwcaps
+established at boot, the cpufeatures code uses
+__read_sysreg_by_encoding() to read this ID register based on the
+sys_reg field of the arm64_elf_hwcaps[] table.
+
+This leads to a kernel splat if an hwcap uses an ID register that
+__read_sysreg_by_encoding() doesn't explicitly handle, as now
+happens when exercising cpu hotplug on an SVE2-capable platform.
+
+So fix it by adding the required case in there.
+
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Dave Martin <Dave.Martin(a)arm.com>
+Signed-off-by: Will Deacon <will.deacon(a)arm.com>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 4f384bbd86c7..8e7473df2660 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -828,6 +828,7 @@ static u64 __read_sysreg_by_encoding(u32 sys_id)
+
+ read_sysreg_case(SYS_ID_AA64PFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64PFR1_EL1);
++ read_sysreg_case(SYS_ID_AA64ZFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR0_EL1);
+ read_sysreg_case(SYS_ID_AA64DFR1_EL1);
+ read_sysreg_case(SYS_ID_AA64MMFR0_EL1);
+--
+2.25.1
+
diff --git a/patches/0045-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch b/patches/0045-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
new file mode 100644
index 000000000000..7df40531adda
--- /dev/null
+++ b/patches/0045-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
@@ -0,0 +1,67 @@
+From 515c2917ae3bc768e8793dac6b27ea4dff36b40c Mon Sep 17 00:00:00 2001
+From: Julien Grall <julien.grall(a)arm.com>
+Date: Mon, 14 Oct 2019 11:21:13 +0100
+Subject: [PATCH openEuler-20.03-LTS-SP4 4/4] arm64: cpufeature: Treat
+ ID_AA64ZFR0_EL1 as RAZ when SVE is not enabled
+
+mainline inclusion
+from mainline-v5.4-rc4
+commit ec52c7134b1fcef0edfc56d55072fd4f261ef198
+category: feature
+bugzilla: https://gitee.com/openeuler/kernel/issues/I8B82O
+CVE: NA
+
+Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
+
+--------------------------------
+
+If CONFIG_ARM64_SVE=n then we fail to report ID_AA64ZFR0_EL1 as 0 when
+read by userspace, despite being required by the architecture. Although
+this is theoretically a change in ABI, userspace will first check for
+the presence of SVE via the HWCAP or the ID_AA64PFR0_EL1.SVE field
+before probing the ID_AA64ZFR0_EL1 register. Given that these are
+reported correctly for this configuration, we can safely tighten up the
+current behaviour.
+
+Ensure ID_AA64ZFR0_EL1 is treated as RAZ when CONFIG_ARM64_SVE=n.
+
+Signed-off-by: Julien Grall <julien.grall(a)arm.com>
+Reviewed-by: Suzuki K Poulose <suzuki.poulose(a)arm.com>
+Reviewed-by: Mark Rutland <mark.rutland(a)arm.com>
+Reviewed-by: Dave Martin <dave.martin(a)arm.com>
+Fixes: 06a916feca2b ("arm64: Expose SVE2 features for userspace")
+Signed-off-by: Will Deacon <will(a)kernel.org>
+Signed-off-by: Yu Liao <liaoyu15(a)huawei.com>
+---
+ arch/arm64/kernel/cpufeature.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
+index 8e7473df2660..98a8b2703f84 100644
+--- a/arch/arm64/kernel/cpufeature.c
++++ b/arch/arm64/kernel/cpufeature.c
+@@ -184,11 +184,16 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ };
+
+ static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
+- ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SM4_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SHA3_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_BITPERM_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_AES_SHIFT, 4, 0),
++ ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SVE),
++ FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ZFR0_SVEVER_SHIFT, 4, 0),
+ ARM64_FTR_END,
+ };
+
+--
+2.25.1
+
diff --git a/series.conf b/series.conf
index 1470060a870a..32716ced5856 100644
--- a/series.conf
+++ b/series.conf
@@ -43,3 +43,7 @@ patches/0038-perf-arm-spe-Add-more-sub-classes-for-operation-pack.patch
patches/0039-perf-arm_spe-Decode-memory-tagging-properties.patch
patches/0040-perf-arm-spe-Add-support-for-ARMv8.3-SPE.patch
patches/0041-drivers-perf-Add-support-for-ARMv8.3-SPE.patch
+patches/0042-arm64-HWCAP-add-support-for-AT_HWCAP2.patch
+patches/0043-arm64-Expose-SVE2-features-for-userspace.patch
+patches/0044-arm64-cpufeature-Fix-missing-ZFR0-in-__read_sysreg_b.patch
+patches/0045-arm64-cpufeature-Treat-ID_AA64ZFR0_EL1-as-RAZ-when-S.patch
--
2.25.1
2
1