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[PATCH OLK-6.6 v8 0/6] block: Add config to show info about opening a mounted device for write
by Li Lingfeng 10 Jan '24

10 Jan '24

v1->v2: 1) Replace BLK_DEV_DUMPINFO with BLK_DEV_WRITE_MOUNTED_QUIET, which is logically opposite; 2) Make BLK_DEV_WRITE_MOUNTED_QUIET dependent on BLK_DEV_WRITE_MOUNTED, and decide whether to set bd_writers by BLK_DEV_WRITE_MOUNTED_QUIET; 3) Move bdev_dump_info() into bdev_may_open(); 4) Add the cmdline interface to control whether to show info; 5) Pass the state of "writes blocked" to part0 when mounting a partition. v2->v3: Add restriction for modifying bd_writers. v3->v4: 1) Count bd_writers regardless of whether bdev_allow_write_mounted is set; 2) Expand the meaning of bdev_allow_write_mounted; 3) Add config option to detect writing to part0 while partitions mounted; 4) Add bd_mounters to record the number of times that part0 or partition is mounted; 5) Show info about opening a lower device for write while upper-layers mounted. v4->v5: Move introduction of bd_mounters to patch1. v5->v6: Delete redundant conflict judgment. v6->v7: 1) Replace BLK_DEV_WRITE_MOUNTED_QUIET with BLK_DEV_WRITE_MOUNTED_DUMP; 2) Remove restriction for setting bdev_allow_write_mounted by cmdline. v7->v8: 1) Add detection of mounting part0 while partitions write opened; 2) Add detection of writing partitions while part0 mounted; 3) Add config in openeuler_defconfig. Li Lingfeng (6): block: Count writers and mounters regardless of whether bdev_allow_write_mounted is set block: Expand the meaning of bdev_allow_write_mounted block: Add config option to detect writing to part0 while partitions mounted block: Add config option to show info about opening a mounted device for write block: Show info about opening a lower device for write while upper-layers mounted add config about writing mounted devices in openeuler_defconfig arch/arm64/configs/openeuler_defconfig | 3 + arch/x86/configs/openeuler_defconfig | 3 + block/Kconfig | 17 ++++ block/bdev.c | 122 +++++++++++++++++++++---- include/linux/blk_types.h | 1 + 5 files changed, 129 insertions(+), 17 deletions(-) -- 2.31.1

2 7

[PATCH OLK-6.6] pid_ns: Make pid_max per namespace
by Yi Yang 10 Jan '24

10 Jan '24

From: Li Zefan <lizefan(a)huawei.com> euler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8TCPY ------------------------------------------------- The adjusted pid_max on the host also takes effect in the container. Move pid_max to pid_namespace to fix this problem. Signed-off-by: Li Zefan <lizefan(a)huawei.com> Signed-off-by: Yi Yang <yiyang13(a)huawei.com> --- arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + include/linux/pid.h | 2 + include/linux/pid_namespace.h | 3 ++ init/Kconfig | 6 +++ kernel/pid.c | 54 +++++++++++++++++++++++++- kernel/pid_namespace.c | 13 +++++++ kernel/sysctl.c | 2 + kernel/trace/pid_list.c | 4 ++ kernel/trace/trace.c | 4 ++ kernel/trace/trace.h | 2 + 11 files changed, 90 insertions(+), 2 deletions(-) diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 9a053bc885dd..a040a64a8350 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -999,6 +999,7 @@ CONFIG_ARCH_USE_QUEUED_RWLOCKS=y CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y +CONFIG_PID_MAX_PER_NAMESPACE=y CONFIG_FREEZER=y # diff --git a/arch/x86/configs/openeuler_defconfig b/arch/x86/configs/openeuler_defconfig index 4bf011ed6307..e5dd6035346e 100644 --- a/arch/x86/configs/openeuler_defconfig +++ b/arch/x86/configs/openeuler_defconfig @@ -1015,6 +1015,7 @@ CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y +CONFIG_PID_MAX_PER_NAMESPACE=y CONFIG_FREEZER=y # diff --git a/include/linux/pid.h b/include/linux/pid.h index 653a527574c4..b90bc447d2a2 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -113,8 +113,10 @@ extern void transfer_pid(struct task_struct *old, struct task_struct *new, struct pid_namespace; extern struct pid_namespace init_pid_ns; +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; extern int pid_max_min, pid_max_max; +#endif /* * look up a PID in the hash table. Must be called with the tasklist_lock diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index f9f9931e02d6..0a7c6dab0b7b 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -36,6 +36,9 @@ struct pid_namespace { #endif struct user_namespace *user_ns; struct ucounts *ucounts; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + int pid_max; +#endif int reboot; /* group exit code if this pidns was rebooted */ struct ns_common ns; #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) diff --git a/init/Kconfig b/init/Kconfig index 869eea4108d0..d52550d35427 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -2104,3 +2104,9 @@ config ARCH_HAS_SYNC_CORE_BEFORE_USERMODE # <asm/syscall_wrapper.h>. config ARCH_HAS_SYSCALL_WRAPPER def_bool n + +config PID_MAX_PER_NAMESPACE + bool "Make pid_max per namespace" + default n + help + Say Y here to enable make pid_max per namespace. diff --git a/kernel/pid.c b/kernel/pid.c index 383abde0c208..db99713600fc 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -59,12 +59,16 @@ struct pid init_struct_pid = { }, } }; -int pid_max = PID_MAX_DEFAULT; - #define RESERVED_PIDS 300 +#ifndef CONFIG_PID_MAX_PER_NAMESPACE +int pid_max = PID_MAX_DEFAULT; int pid_max_min = RESERVED_PIDS + 1; int pid_max_max = PID_MAX_LIMIT; +#else +static int pid_max_min = RESERVED_PIDS + 1; +static int pid_max_max = PID_MAX_LIMIT; +#endif /* * PID-map pages start out as NULL, they get allocated upon @@ -80,6 +84,9 @@ struct pid_namespace init_pid_ns = { .child_reaper = &init_task, .user_ns = &init_user_ns, .ns.inum = PROC_PID_INIT_INO, +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + .pid_max = PID_MAX_DEFAULT, +#endif #ifdef CONFIG_PID_NS .ns.ops = &pidns_operations, #endif @@ -194,7 +201,11 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, tid = set_tid[ns->level - i]; retval = -EINVAL; +#ifndef CONFIG_PID_MAX_PER_NAMESPACE if (tid < 1 || tid >= pid_max) +#else + if (tid < 1 || tid >= task_active_pid_ns(current)->pid_max) +#endif goto out_free; /* * Also fail if a PID != 1 is requested and @@ -234,7 +245,11 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, * a partially initialized PID (see below). */ nr = idr_alloc_cyclic(&tmp->idr, NULL, pid_min, +#ifndef CONFIG_PID_MAX_PER_NAMESPACE pid_max, GFP_ATOMIC); +#else + tmp->pid_max, GFP_ATOMIC); +#endif } spin_unlock_irq(&pidmap_lock); idr_preload_end(); @@ -646,8 +661,37 @@ SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) return fd; } +#ifdef CONFIG_PID_MAX_PER_NAMESPACE +static int proc_dointvec_pidmax(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table tmp; + + tmp = *table; + tmp.data = &task_active_pid_ns(current)->pid_max; + + return proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); +} + +static struct ctl_table pid_ctl_table[] = { + { + .procname = "pid_max", + .data = &init_pid_ns.pid_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_pidmax, + .extra1 = &pid_max_min, + .extra2 = &pid_max_max, + }, + {} +}; +#endif + void __init pid_idr_init(void) { +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + int pid_max = init_pid_ns.pid_max; +#endif /* Verify no one has done anything silly: */ BUILD_BUG_ON(PID_MAX_LIMIT >= PIDNS_ADDING); @@ -658,6 +702,9 @@ void __init pid_idr_init(void) PIDS_PER_CPU_MIN * num_possible_cpus()); pr_info("pid_max: default: %u minimum: %u\n", pid_max, pid_max_min); +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + init_pid_ns.pid_max = pid_max; +#endif idr_init(&init_pid_ns.idr); init_pid_ns.pid_cachep = kmem_cache_create("pid", @@ -665,6 +712,9 @@ void __init pid_idr_init(void) __alignof__(struct pid), SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT, NULL); +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + register_sysctl_init("kernel", pid_ctl_table); +#endif } static struct file *__pidfd_fget(struct task_struct *task, int fd) diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index 619972c78774..c837b1096dcb 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -110,6 +110,9 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns ns->user_ns = get_user_ns(user_ns); ns->ucounts = ucounts; ns->pid_allocated = PIDNS_ADDING; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + ns->pid_max = parent_pid_ns->pid_max; +#endif #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) ns->memfd_noexec_scope = pidns_memfd_noexec_scope(parent_pid_ns); #endif @@ -295,6 +298,10 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, next = idr_get_cursor(&pid_ns->idr) - 1; tmp.data = &next; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + tmp.extra2 = &pid_ns->pid_max; +#endif + ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); if (!ret && write) idr_set_cursor(&pid_ns->idr, next + 1); @@ -302,7 +309,9 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, return ret; } +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; +#endif static struct ctl_table pid_ns_ctl_table[] = { { .procname = "ns_last_pid", @@ -310,7 +319,11 @@ static struct ctl_table pid_ns_ctl_table[] = { .mode = 0666, /* permissions are checked in the handler */ .proc_handler = pid_ns_ctl_handler, .extra1 = SYSCTL_ZERO, +#ifndef CONFIG_PID_MAX_PER_NAMESPACE .extra2 = &pid_max, +#else + .extra2 = &init_pid_ns.pid_max, +#endif }, { } }; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 354a2d294f52..e84df0818517 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1809,6 +1809,7 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_dointvec, }, #endif +#ifndef CONFIG_PID_MAX_PER_NAMESPACE { .procname = "pid_max", .data = &pid_max, @@ -1818,6 +1819,7 @@ static struct ctl_table kern_table[] = { .extra1 = &pid_max_min, .extra2 = &pid_max_max, }, +#endif { .procname = "panic_on_oops", .data = &panic_on_oops, diff --git a/kernel/trace/pid_list.c b/kernel/trace/pid_list.c index 95106d02b32d..8056d7441d05 100644 --- a/kernel/trace/pid_list.c +++ b/kernel/trace/pid_list.c @@ -414,7 +414,11 @@ struct trace_pid_list *trace_pid_list_alloc(void) int i; /* According to linux/thread.h, pids can be no bigger that 30 bits */ +#ifndef CONFIG_PID_MAX_PER_NAMESPACE WARN_ON_ONCE(pid_max > (1 << 30)); +#else + WARN_ON_ONCE(task_active_pid_ns(current)->pid_max > (1 << 30)); +#endif pid_list = kzalloc(sizeof(*pid_list), GFP_KERNEL); if (!pid_list) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b656cab67f67..5afa58302b06 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5423,7 +5423,11 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled) if (mask == TRACE_ITER_RECORD_TGID) { if (!tgid_map) { +#ifndef CONFIG_PID_MAX_PER_NAMESPACE tgid_map_max = pid_max; +#else + tgid_map_max = init_pid_ns.pid_max; +#endif map = kvcalloc(tgid_map_max + 1, sizeof(*tgid_map), GFP_KERNEL); diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index d608f6128704..52123df262b2 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -695,7 +695,9 @@ extern unsigned long tracing_thresh; /* PID filtering */ +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; +#endif bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid); -- 2.25.1

2 1

[PATCH openEuler-22.03-LTS] livepatch/core: Disable support for replacing
by Zheng Yejian 10 Jan '24

10 Jan '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8ORHJ -------------------------------- Replacing is an optimization for livepatching based on ftrace, the wo_ftrace solution do not support it. Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> --- kernel/livepatch/core.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 40259a2988e9..cc7e140088df 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -1155,6 +1155,9 @@ static void klp_init_func_early(struct klp_object *obj, kobject_init(&func->kobj, &klp_ktype_func); list_add_tail(&func->node, &obj->func_list); func->func_node = NULL; +#ifdef CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY + func->nop = false; +#endif } static void klp_init_object_early(struct klp_patch *patch, @@ -1165,6 +1168,7 @@ static void klp_init_object_early(struct klp_patch *patch, list_add_tail(&obj->node, &patch->obj_list); #ifdef CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY obj->mod = NULL; + obj->dynamic = false; #endif } @@ -1199,6 +1203,12 @@ static int klp_init_patch(struct klp_patch *patch) if (ret) return ret; +#ifdef CONFIG_LIVEPATCH_STOP_MACHINE_CONSISTENCY + if (patch->replace) { + pr_err("Replacing is not supported\n"); + return -EINVAL; + } +#endif if (patch->replace) { ret = klp_add_nops(patch); if (ret) -- 2.25.1

2 1

[PATCH openEuler-1.0-LTS v2] net: bridge: multicast: fix UAF of net_bridge
by Ziyang Xuan 10 Jan '24

10 Jan '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8UZTK CVE: NA -------------------------------- Get a UAF problem as following: ======================================================== BUG: KASAN: use-after-free in run_timer_softirq+0x526/0x750 ... Call Trace: <IRQ> dump_stack+0x8b/0xbb print_address_description+0x6a/0x270 kasan_report+0x179/0x2c0 ? run_timer_softirq+0x526/0x750 run_timer_softirq+0x526/0x750 ? pvclock_clocksource_read+0xd1/0x180 ? init_timer_key+0xc0/0xc0 ? kvm_sched_clock_read+0xd/0x20 ? sched_clock+0x5/0x10 ? sched_clock_cpu+0x18/0x100 __do_softirq+0x119/0x3a2 irq_exit+0x153/0x160 smp_apic_timer_interrupt+0x92/0x1a0 apic_timer_interrupt+0xf/0x20 ... Allocated by task 11277: kasan_kmalloc+0xa0/0xd0 __kmalloc_node+0x190/0x2b0 kvmalloc_node+0x43/0x70 alloc_netdev_mqs+0x6a/0x660 rtnl_create_link+0x12a/0x420 rtnl_newlink+0x832/0xab0 rtnetlink_rcv_msg+0x424/0x500 netlink_rcv_skb+0xcd/0x200 netlink_unicast+0x2e9/0x3a0 netlink_sendmsg+0x4d7/0x670 sock_sendmsg+0x6d/0x80 ____sys_sendmsg+0x36a/0x3d0 ___sys_sendmsg+0x10a/0x190 __sys_sendmsg+0xd2/0x150 do_syscall_64+0x77/0x2c0 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Freed by task 11313: __kasan_slab_free+0x130/0x180 kfree+0x90/0x1a0 device_release+0x47/0xe0 kobject_release+0x98/0x200 netdev_run_todo+0x36d/0x490 rtnetlink_rcv_msg+0x42c/0x500 netlink_rcv_skb+0xcd/0x200 netlink_unicast+0x2e9/0x3a0 netlink_sendmsg+0x4d7/0x670 sock_sendmsg+0x6d/0x80 ____sys_sendmsg+0x36a/0x3d0 ___sys_sendmsg+0x10a/0x190 __sys_sendmsg+0xd2/0x150 do_syscall_64+0x77/0x2c0 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Under closed state of bridge netdev, try to activate ip6_own_query.timer of bridge netdev by br_multicast_set_querier(), and delete bridge netdev immediately afterwards. Because the timer will not be deleted during bridge netdev deleting process. When the timer is not activated before bridge netdev is released, UAF will be triggered to access the timer in run_timer_softirq(). Add br_multicast_stop() in br_multicast_dev_del() to delete the timer during bridge netdev deleting process as done in commit 613d61dbef8e ("net: bridge: vlan: add global and per-port multicast context"). Fixes: cc0fdd802859 ("bridge: separate querier and query timer into IGMP/IPv4 and MLD/IPv6 ones") Signed-off-by: Ziyang Xuan <william.xuanziyang(a)huawei.com> -- v2: - Remove "Offering" item. --- net/bridge/br_multicast.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 1dc32cbd20bb..d84abee1d24c 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -2068,6 +2068,7 @@ void br_multicast_dev_del(struct net_bridge *br) out: spin_unlock_bh(&br->multicast_lock); + br_multicast_stop(br); } int br_multicast_set_router(struct net_bridge *br, unsigned long val) -- 2.25.1

2 1

[PATCH OLK-6.6 v2 0/3] sync vgic-its from 5.10 to 6.6
by jiaqingtong 10 Jan '24

10 Jan '24

sync vgic-its from 5.10 to 6.6 Heyi Guo (1): KVM: arm64: vgic-its: Flush pending LPIs when nuking DT Xiangyou Xie (2): KVM: arm/arm64: vgic-its: Introduce multiple LPI translation caches KVM: arm/arm64: vgic-its: Do not execute invalidate MSI-LPI translation cache on movi command arch/arm64/kvm/vgic/vgic-init.c | 8 +- arch/arm64/kvm/vgic/vgic-its.c | 255 +++++++++++++++++++++----------- include/kvm/arm_vgic.h | 13 +- 3 files changed, 183 insertions(+), 93 deletions(-) base-commit: ade260241330687a9006159f604a00deac794776 -- 2.43.GIT

1 3

[PATCH OLK-6.6] pid_ns: Make pid_max per namespace
by Yi Yang 10 Jan '24

10 Jan '24

From: Li Zefan <lizefan(a)huawei.com> euler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8TCPY ------------------------------------------------- The adjusted pid_max on the host also takes effect in the container. Move pid_max to pid_namespace to fix this problem. Signed-off-by: Pavel Emelyanov <xemul(a)parallels.com> Signed-off-by: Yi Yang <yiyang13(a)huawei.com> --- include/linux/pid.h | 3 --- include/linux/pid_namespace.h | 1 + kernel/pid.c | 42 ++++++++++++++++++++++++++++++----- kernel/pid_namespace.c | 6 +++-- kernel/sysctl.c | 9 -------- kernel/trace/pid_list.c | 2 +- kernel/trace/trace.c | 2 +- kernel/trace/trace.h | 2 -- 8 files changed, 43 insertions(+), 24 deletions(-) diff --git a/include/linux/pid.h b/include/linux/pid.h index 653a527574c4..7f0f84a368b7 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -113,9 +113,6 @@ extern void transfer_pid(struct task_struct *old, struct task_struct *new, struct pid_namespace; extern struct pid_namespace init_pid_ns; -extern int pid_max; -extern int pid_max_min, pid_max_max; - /* * look up a PID in the hash table. Must be called with the tasklist_lock * or rcu_read_lock() held. diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index f9f9931e02d6..338012f75f6a 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -36,6 +36,7 @@ struct pid_namespace { #endif struct user_namespace *user_ns; struct ucounts *ucounts; + int pid_max; int reboot; /* group exit code if this pidns was rebooted */ struct ns_common ns; #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) diff --git a/kernel/pid.c b/kernel/pid.c index 383abde0c208..1cf72619d922 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -43,6 +43,7 @@ #include <linux/sched/task.h> #include <linux/idr.h> #include <net/sock.h> +#include <linux/kmemleak.h> #include <uapi/linux/pidfd.h> struct pid init_struct_pid = { @@ -59,12 +60,10 @@ struct pid init_struct_pid = { }, } }; -int pid_max = PID_MAX_DEFAULT; - #define RESERVED_PIDS 300 -int pid_max_min = RESERVED_PIDS + 1; -int pid_max_max = PID_MAX_LIMIT; +static int pid_max_min = RESERVED_PIDS + 1; +static int pid_max_max = PID_MAX_LIMIT; /* * PID-map pages start out as NULL, they get allocated upon @@ -80,6 +79,7 @@ struct pid_namespace init_pid_ns = { .child_reaper = &init_task, .user_ns = &init_user_ns, .ns.inum = PROC_PID_INIT_INO, + .pid_max = PID_MAX_DEFAULT, #ifdef CONFIG_PID_NS .ns.ops = &pidns_operations, #endif @@ -194,7 +194,7 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, tid = set_tid[ns->level - i]; retval = -EINVAL; - if (tid < 1 || tid >= pid_max) + if (tid < 1 || tid >= task_active_pid_ns(current)->pid_max) goto out_free; /* * Also fail if a PID != 1 is requested and @@ -234,7 +234,7 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, * a partially initialized PID (see below). */ nr = idr_alloc_cyclic(&tmp->idr, NULL, pid_min, - pid_max, GFP_ATOMIC); + tmp->pid_max, GFP_ATOMIC); } spin_unlock_irq(&pidmap_lock); idr_preload_end(); @@ -646,8 +646,34 @@ SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) return fd; } +static int proc_dointvec_pidmax(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table tmp; + + tmp = *table; + tmp.data = &task_active_pid_ns(current)->pid_max; + + return proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); +} + +static struct ctl_table pid_ctl_table[] = { + { + .procname = "pid_max", + .data = &init_pid_ns.pid_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_pidmax, + .extra1 = &pid_max_min, + .extra2 = &pid_max_max, + }, + {} +}; + void __init pid_idr_init(void) { + int pid_max = init_pid_ns.pid_max; + /* Verify no one has done anything silly: */ BUILD_BUG_ON(PID_MAX_LIMIT >= PIDNS_ADDING); @@ -658,6 +684,8 @@ void __init pid_idr_init(void) PIDS_PER_CPU_MIN * num_possible_cpus()); pr_info("pid_max: default: %u minimum: %u\n", pid_max, pid_max_min); + init_pid_ns.pid_max = pid_max; + idr_init(&init_pid_ns.idr); init_pid_ns.pid_cachep = kmem_cache_create("pid", @@ -665,6 +693,8 @@ void __init pid_idr_init(void) __alignof__(struct pid), SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT, NULL); + + register_sysctl_init("kernel", pid_ctl_table); } static struct file *__pidfd_fget(struct task_struct *task, int fd) diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index 619972c78774..f66e4f866472 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -110,6 +110,7 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns ns->user_ns = get_user_ns(user_ns); ns->ucounts = ucounts; ns->pid_allocated = PIDNS_ADDING; + ns->pid_max = parent_pid_ns->pid_max; #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) ns->memfd_noexec_scope = pidns_memfd_noexec_scope(parent_pid_ns); #endif @@ -295,6 +296,8 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, next = idr_get_cursor(&pid_ns->idr) - 1; tmp.data = &next; + tmp.extra2 = &pid_ns->pid_max; + ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); if (!ret && write) idr_set_cursor(&pid_ns->idr, next + 1); @@ -302,7 +305,6 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, return ret; } -extern int pid_max; static struct ctl_table pid_ns_ctl_table[] = { { .procname = "ns_last_pid", @@ -310,7 +312,7 @@ static struct ctl_table pid_ns_ctl_table[] = { .mode = 0666, /* permissions are checked in the handler */ .proc_handler = pid_ns_ctl_handler, .extra1 = SYSCTL_ZERO, - .extra2 = &pid_max, + .extra2 = &init_pid_ns.pid_max, }, { } }; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 354a2d294f52..b000e733281e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1809,15 +1809,6 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_dointvec, }, #endif - { - .procname = "pid_max", - .data = &pid_max, - .maxlen = sizeof (int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = &pid_max_min, - .extra2 = &pid_max_max, - }, { .procname = "panic_on_oops", .data = &panic_on_oops, diff --git a/kernel/trace/pid_list.c b/kernel/trace/pid_list.c index 95106d02b32d..2ff4259928ae 100644 --- a/kernel/trace/pid_list.c +++ b/kernel/trace/pid_list.c @@ -414,7 +414,7 @@ struct trace_pid_list *trace_pid_list_alloc(void) int i; /* According to linux/thread.h, pids can be no bigger that 30 bits */ - WARN_ON_ONCE(pid_max > (1 << 30)); + WARN_ON_ONCE(task_active_pid_ns(current)->pid_max > (1 << 30)); pid_list = kzalloc(sizeof(*pid_list), GFP_KERNEL); if (!pid_list) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index a40d6baf101f..2fac76f2a865 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5466,7 +5466,7 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled) if (mask == TRACE_ITER_RECORD_TGID) { if (!tgid_map) { - tgid_map_max = pid_max; + tgid_map_max = init_pid_ns.pid_max; map = kvcalloc(tgid_map_max + 1, sizeof(*tgid_map), GFP_KERNEL); diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index d608f6128704..6077db8894fd 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -695,8 +695,6 @@ extern unsigned long tracing_thresh; /* PID filtering */ -extern int pid_max; - bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid); bool trace_ignore_this_task(struct trace_pid_list *filtered_pids, -- 2.25.1

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[PATCH v2 OLK-6.6 00/19] mm: mem_reliable: Introduce memory reliable
by Wupeng Ma 10 Jan '24

10 Jan '24

From: Ma Wupeng <mawupeng1(a)huawei.com> Introduction ============ Memory reliable feature is a memory tiering mechanism. It is based on kernel mirror feature, which splits memory into two separate regions, mirrored(reliable) region and non-mirrored (non-reliable) region. for kernel mirror feature: - allocate kernel memory from mirrored region by default - allocate user memory from non-mirrored region by default non-mirrored region will be arranged into ZONE_MOVABLE. for kernel reliable feature, it has additional features below: - normal user tasks never alloc memory from mirrored region with userspace apis(malloc, mmap, etc.) - special user tasks will allocate memory from mirrored region by default - shmem/pagecache allocate memory from mirrored region by default - upper limit of mirrored region allcated for user tasks, shmem and page cache Support Reliable fallback mechanism which allows special user tasks, shmem and page cache can fallback to alloc non-mirrored region, it's the default setting. In order to fulfil the goal - GFP_KERNEL flag added for task to alloc memory from mirrored region. - the high_zoneidx for special user tasks/shmem/pagecache is set to ZONE_NORMAL to alloc memory from mirrored region. - normal user tasks can only alloc memory from ZONE_MOVABLE. Changelog since v1: - update bugzilla url. Chen Wandun (1): mm: mem_reliable: Alloc pagecache from reliable region Ma Wupeng (16): proc: introduce proc_hide_ents to hide proc files efi: Disable mirror feature during crashkernel mm: mem_reliable: Introduce memory reliable mm: mem_reliable: Alloc task memory from reliable region mm: mem_reliable: Add memory reliable support during hugepaged collapse mm/memblock: Introduce ability to alloc memory from specify memory region mm/hugetlb: Allocate non-mirrored memory by default mm: mem_reliable: Count reliable page cache usage mm: mem_reliable: Count reliable shmem usage mm: mem_reliable: Show reliable meminfo mm: mem_reliable: Add limiting the usage of reliable memory mm: mem_reliable: Introduce fallback mechanism for memory reliable proc: mem_reliable: Count reliable memory usage of reliable tasks mm: mem_reliable: Introduce proc interface to disable memory reliable features mm: mem_reliable: Show debug info about memory reliable if oom occurs config: enable MEMORY_RELIABLE by default Peng Wu (1): mm: mem_reliable: Add cmdline reliable_debug to enable separate feature Zhou Guanghui (1): shmem: mem_reliable: Alloc shmem from reliable region .../admin-guide/kernel-parameters.txt | 15 +- Documentation/filesystems/proc.rst | 30 ++ arch/arm64/configs/openeuler_defconfig | 1 + fs/proc/Makefile | 1 + fs/proc/base.c | 21 +- fs/proc/mem_reliable.c | 100 ++++ fs/proc/meminfo.c | 2 + fs/proc/task_mmu.c | 1 + include/linux/gfp.h | 6 + include/linux/gfp_types.h | 10 +- include/linux/mem_reliable.h | 261 ++++++++++ include/linux/memblock.h | 6 + include/linux/mm.h | 3 + include/linux/mm_inline.h | 6 + include/linux/mm_types.h | 4 + include/linux/mmzone.h | 5 + include/linux/sched.h | 5 + include/trace/events/mmflags.h | 3 +- kernel/events/uprobes.c | 2 + mm/Kconfig | 17 + mm/Makefile | 1 + mm/filemap.c | 11 +- mm/huge_memory.c | 4 + mm/hugetlb.c | 18 +- mm/khugepaged.c | 18 + mm/ksm.c | 2 + mm/mem_reliable.c | 473 ++++++++++++++++++ mm/memblock.c | 92 +++- mm/memory.c | 10 + mm/migrate.c | 5 + mm/migrate_device.c | 1 + mm/mm_init.c | 34 +- mm/page_alloc.c | 175 ++++++- mm/rmap.c | 7 + mm/shmem.c | 11 + mm/show_mem.c | 1 + mm/swapfile.c | 1 + mm/userswap.c | 4 + mm/vmscan.c | 2 + tools/perf/builtin-kmem.c | 1 + 40 files changed, 1342 insertions(+), 28 deletions(-) create mode 100644 fs/proc/mem_reliable.c create mode 100644 include/linux/mem_reliable.h create mode 100644 mm/mem_reliable.c -- 2.25.1

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[PATCH OLK-6.6 0/2] *** SUBJECT HERE ***
by lishusen 10 Jan '24

10 Jan '24

*** BLURB HERE *** Jingyi Wang (1): KVM: arm64: Make use of TWED feature Zengruan Ye (1): arm64: cpufeature: TWED support detection arch/arm64/Kconfig | 10 ++++++++++ arch/arm64/include/asm/kvm_arm.h | 8 ++++++++ arch/arm64/include/asm/kvm_emulate.h | 27 +++++++++++++++++++++++++++ arch/arm64/include/asm/kvm_host.h | 8 ++++++++ arch/arm64/include/asm/virt.h | 5 +++++ arch/arm64/kernel/cpufeature.c | 12 ++++++++++++ arch/arm64/kvm/arm.c | 15 +++++++++++++++ arch/arm64/tools/cpucaps | 1 + 8 files changed, 86 insertions(+) -- 2.33.0

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[PATCH OLK-6.6] pid_ns: Make pid_max per namespace
by Yi Yang 10 Jan '24

10 Jan '24

From: Li Zefan <lizefan(a)huawei.com> euler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8TCPY ------------------------------------------------- The adjusted pid_max on the host also takes effect in the container. Move pid_max to pid_namespace to fix this problem. Signed-off-by: Li Zefan <lizefan(a)huawei.com> Signed-off-by: Yi Yang <yiyang13(a)huawei.com> --- arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + include/linux/pid.h | 2 + include/linux/pid_namespace.h | 3 ++ init/Kconfig | 6 +++ kernel/pid.c | 53 ++++++++++++++++++++++++++ kernel/pid_namespace.c | 13 +++++++ kernel/sysctl.c | 2 + kernel/trace/pid_list.c | 4 ++ kernel/trace/trace.c | 4 ++ kernel/trace/trace.h | 2 + 11 files changed, 91 insertions(+) diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 9a053bc885dd..a040a64a8350 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -999,6 +999,7 @@ CONFIG_ARCH_USE_QUEUED_RWLOCKS=y CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y +CONFIG_PID_MAX_PER_NAMESPACE=y CONFIG_FREEZER=y # diff --git a/arch/x86/configs/openeuler_defconfig b/arch/x86/configs/openeuler_defconfig index 4bf011ed6307..e5dd6035346e 100644 --- a/arch/x86/configs/openeuler_defconfig +++ b/arch/x86/configs/openeuler_defconfig @@ -1015,6 +1015,7 @@ CONFIG_QUEUED_RWLOCKS=y CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y +CONFIG_PID_MAX_PER_NAMESPACE=y CONFIG_FREEZER=y # diff --git a/include/linux/pid.h b/include/linux/pid.h index 653a527574c4..b90bc447d2a2 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -113,8 +113,10 @@ extern void transfer_pid(struct task_struct *old, struct task_struct *new, struct pid_namespace; extern struct pid_namespace init_pid_ns; +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; extern int pid_max_min, pid_max_max; +#endif /* * look up a PID in the hash table. Must be called with the tasklist_lock diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index f9f9931e02d6..0a7c6dab0b7b 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -36,6 +36,9 @@ struct pid_namespace { #endif struct user_namespace *user_ns; struct ucounts *ucounts; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + int pid_max; +#endif int reboot; /* group exit code if this pidns was rebooted */ struct ns_common ns; #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) diff --git a/init/Kconfig b/init/Kconfig index 869eea4108d0..d52550d35427 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -2104,3 +2104,9 @@ config ARCH_HAS_SYNC_CORE_BEFORE_USERMODE # <asm/syscall_wrapper.h>. config ARCH_HAS_SYSCALL_WRAPPER def_bool n + +config PID_MAX_PER_NAMESPACE + bool "Make pid_max per namespace" + default n + help + Say Y here to enable make pid_max per namespace. diff --git a/kernel/pid.c b/kernel/pid.c index 383abde0c208..b6791a8a211d 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -59,12 +59,19 @@ struct pid init_struct_pid = { }, } }; +#ifndef CONFIG_PID_MAX_PER_NAMESPACE int pid_max = PID_MAX_DEFAULT; +#endif #define RESERVED_PIDS 300 +#ifndef CONFIG_PID_MAX_PER_NAMESPACE int pid_max_min = RESERVED_PIDS + 1; int pid_max_max = PID_MAX_LIMIT; +#else +static int pid_max_min = RESERVED_PIDS + 1; +static int pid_max_max = PID_MAX_LIMIT; +#endif /* * PID-map pages start out as NULL, they get allocated upon @@ -80,6 +87,9 @@ struct pid_namespace init_pid_ns = { .child_reaper = &init_task, .user_ns = &init_user_ns, .ns.inum = PROC_PID_INIT_INO, +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + .pid_max = PID_MAX_DEFAULT, +#endif #ifdef CONFIG_PID_NS .ns.ops = &pidns_operations, #endif @@ -194,7 +204,11 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, tid = set_tid[ns->level - i]; retval = -EINVAL; +#ifndef CONFIG_PID_MAX_PER_NAMESPACE if (tid < 1 || tid >= pid_max) +#else + if (tid < 1 || tid >= task_active_pid_ns(current)->pid_max) +#endif goto out_free; /* * Also fail if a PID != 1 is requested and @@ -234,7 +248,11 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, * a partially initialized PID (see below). */ nr = idr_alloc_cyclic(&tmp->idr, NULL, pid_min, +#ifndef CONFIG_PID_MAX_PER_NAMESPACE pid_max, GFP_ATOMIC); +#else + tmp->pid_max, GFP_ATOMIC); +#endif } spin_unlock_irq(&pidmap_lock); idr_preload_end(); @@ -646,8 +664,37 @@ SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) return fd; } +#ifdef CONFIG_PID_MAX_PER_NAMESPACE +static int proc_dointvec_pidmax(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table tmp; + + tmp = *table; + tmp.data = &task_active_pid_ns(current)->pid_max; + + return proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); +} + +static struct ctl_table pid_ctl_table[] = { + { + .procname = "pid_max", + .data = &init_pid_ns.pid_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_pidmax, + .extra1 = &pid_max_min, + .extra2 = &pid_max_max, + }, + {} +}; +#endif + void __init pid_idr_init(void) { +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + int pid_max = init_pid_ns.pid_max; +#endif /* Verify no one has done anything silly: */ BUILD_BUG_ON(PID_MAX_LIMIT >= PIDNS_ADDING); @@ -658,6 +705,9 @@ void __init pid_idr_init(void) PIDS_PER_CPU_MIN * num_possible_cpus()); pr_info("pid_max: default: %u minimum: %u\n", pid_max, pid_max_min); +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + init_pid_ns.pid_max = pid_max; +#endif idr_init(&init_pid_ns.idr); init_pid_ns.pid_cachep = kmem_cache_create("pid", @@ -665,6 +715,9 @@ void __init pid_idr_init(void) __alignof__(struct pid), SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT, NULL); +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + register_sysctl_init("kernel", pid_ctl_table); +#endif } static struct file *__pidfd_fget(struct task_struct *task, int fd) diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index 619972c78774..c837b1096dcb 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -110,6 +110,9 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns ns->user_ns = get_user_ns(user_ns); ns->ucounts = ucounts; ns->pid_allocated = PIDNS_ADDING; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + ns->pid_max = parent_pid_ns->pid_max; +#endif #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) ns->memfd_noexec_scope = pidns_memfd_noexec_scope(parent_pid_ns); #endif @@ -295,6 +298,10 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, next = idr_get_cursor(&pid_ns->idr) - 1; tmp.data = &next; +#ifdef CONFIG_PID_MAX_PER_NAMESPACE + tmp.extra2 = &pid_ns->pid_max; +#endif + ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); if (!ret && write) idr_set_cursor(&pid_ns->idr, next + 1); @@ -302,7 +309,9 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int write, return ret; } +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; +#endif static struct ctl_table pid_ns_ctl_table[] = { { .procname = "ns_last_pid", @@ -310,7 +319,11 @@ static struct ctl_table pid_ns_ctl_table[] = { .mode = 0666, /* permissions are checked in the handler */ .proc_handler = pid_ns_ctl_handler, .extra1 = SYSCTL_ZERO, +#ifndef CONFIG_PID_MAX_PER_NAMESPACE .extra2 = &pid_max, +#else + .extra2 = &init_pid_ns.pid_max, +#endif }, { } }; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 354a2d294f52..e84df0818517 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1809,6 +1809,7 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_dointvec, }, #endif +#ifndef CONFIG_PID_MAX_PER_NAMESPACE { .procname = "pid_max", .data = &pid_max, @@ -1818,6 +1819,7 @@ static struct ctl_table kern_table[] = { .extra1 = &pid_max_min, .extra2 = &pid_max_max, }, +#endif { .procname = "panic_on_oops", .data = &panic_on_oops, diff --git a/kernel/trace/pid_list.c b/kernel/trace/pid_list.c index 95106d02b32d..8056d7441d05 100644 --- a/kernel/trace/pid_list.c +++ b/kernel/trace/pid_list.c @@ -414,7 +414,11 @@ struct trace_pid_list *trace_pid_list_alloc(void) int i; /* According to linux/thread.h, pids can be no bigger that 30 bits */ +#ifndef CONFIG_PID_MAX_PER_NAMESPACE WARN_ON_ONCE(pid_max > (1 << 30)); +#else + WARN_ON_ONCE(task_active_pid_ns(current)->pid_max > (1 << 30)); +#endif pid_list = kzalloc(sizeof(*pid_list), GFP_KERNEL); if (!pid_list) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b656cab67f67..5afa58302b06 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5423,7 +5423,11 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled) if (mask == TRACE_ITER_RECORD_TGID) { if (!tgid_map) { +#ifndef CONFIG_PID_MAX_PER_NAMESPACE tgid_map_max = pid_max; +#else + tgid_map_max = init_pid_ns.pid_max; +#endif map = kvcalloc(tgid_map_max + 1, sizeof(*tgid_map), GFP_KERNEL); diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index d608f6128704..52123df262b2 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -695,7 +695,9 @@ extern unsigned long tracing_thresh; /* PID filtering */ +#ifndef CONFIG_PID_MAX_PER_NAMESPACE extern int pid_max; +#endif bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid); -- 2.25.1

2 1

[PATCH OLK-6.6 1/2] arm64: cpufeature: TWED support detection
by lishusen 10 Jan '24

10 Jan '24

From: Zengruan Ye <yezengruan(a)huawei.com> virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8TN8N CVE: NA ----------------------------- TWE Delay is an optional feature in ARMv8.6 Extensions. This patch detect this feature. Signed-off-by: Zengruan Ye <yezengruan(a)huawei.com> Signed-off-by: Jingyi Wang <wangjingyi11(a)huawei.com> Reviewed-by: Keqian Zhu <zhukeqian1(a)huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai(a)huawei.com> Signed-off-by: lishusen <lishusen2(a)huawei.com> --- arch/arm64/Kconfig | 10 ++++++++++ arch/arm64/kernel/cpufeature.c | 12 ++++++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 23 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index d1705fdc046a..9db5bd439a29 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2175,6 +2175,16 @@ config ARM64_EPAN if the cpu does not implement the feature. endmenu # "ARMv8.7 architectural features" +menu "ARMv8.6 architectural features" + +config ARM64_TWED + bool "Enable support for delayed trapping of WFE" + default y + help + Delayed Trapping of WFE (part of the ARMv8.6 Extensions) + +endmenu + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 455e72ce080a..9169d622805d 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2722,6 +2722,18 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64MMFR2_EL1, EVT, IMP) }, +#ifdef CONFIG_ARM64_TWED + { + .desc = "Delayed Trapping of WFE", + .capability = ARM64_HAS_TWED, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64MMFR1_EL1, + .field_pos = ID_AA64MMFR1_EL1_TWED_SHIFT, + .sign = FTR_UNSIGNED, + .min_field_value = 1, + }, +#endif {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 569ecec76c16..fea9f598f4ef 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -52,6 +52,7 @@ HAS_TIDCP1 HAS_TLB_RANGE HAS_VIRT_HOST_EXTN HAS_WFXT +HAS_TWED HW_DBM KVM_HVHE KVM_PROTECTED_MODE -- 2.33.0

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