hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7F28R CVE: NA

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On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when TTBRx.CNP=1 differs from the standard ARM core. This causes issues when tlb entries sharing between CPU cores. Avoid these issues by disabling CNP feature for Hisilicon LINXICORE9100 cores.

Signed-off-by: Tong Tiangen tongtiangen@huawei.com --- Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 11 +++++++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/cpucaps.h | 1 + arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/kernel/cpu_errata.c | 14 ++++++++++++++ arch/arm64/kernel/cpufeature.c | 3 +++ 7 files changed, 34 insertions(+)

diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index b72fbbfe3fcb..95834bea66a4 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -149,6 +149,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | Hisilicon | TSV{110,200} | #1980005 | HISILICON_ERRATUM_1980005 | +----------------+-----------------+-----------------+-----------------------------+ +| Hisilicon | LINXICORE9100 | #162100125 | HISILICON_ERRATUM_162100125 | ++----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+ | Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 | +----------------+-----------------+-----------------+-----------------------------+ diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3dcf96f37a3c..75da7a29aa19 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -802,6 +802,17 @@ config HISILICON_ERRATUM_1980005

If unsure, say N.

+config HISILICON_ERRATUM_162100125 + bool "Hisilicon erratum 162100125" + default y + help + On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when + TTBRx.CNP=1 differs from the standard ARM core. This causes issues when + tlb entries sharing between CPU cores. Avoid these issues by disabling + CNP support for Hisilicon LINXICORE9100 cores. + + If unsure, say Y. + config QCOM_FALKOR_ERRATUM_1003 bool "Falkor E1003: Incorrect translation due to ASID change" default y diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 5ef45486a594..79fd30bd16e9 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -390,6 +390,7 @@ CONFIG_QCOM_FALKOR_ERRATUM_E1041=y CONFIG_SOCIONEXT_SYNQUACER_PREITS=y CONFIG_HISILICON_ERRATUM_HIP08_RU_PREFETCH=y # CONFIG_HISILICON_HIP08_RU_PREFETCH_DEFAULT_OFF is not set +CONFIG_HISILICON_ERRATUM_162100125=y # end of ARM errata workarounds via the alternatives framework

CONFIG_ARM64_4K_PAGES=y diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index 37240e1f553c..b43f8e374114 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -74,6 +74,7 @@ #define ARM64_SPECTRE_BHB 66 #define ARM64_WORKAROUND_1742098 67 #define ARM64_HAS_WFXT 68 +#define ARM64_WORKAROUND_HISILICON_ERRATUM_162100125 69

#define ARM64_NCAPS 80

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 812781fba3f9..e6b0ec40932d 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -111,6 +111,7 @@

#define HISI_CPU_PART_TSV110 0xD01 #define HISI_CPU_PART_TSV200 0xD02 +#define HISI_CPU_PART_LINXICORE9100 0xD02

#define PHYTIUM_CPU_PART_1500A 0X660 #define PHYTIUM_CPU_PART_2000AHK 0X661 @@ -161,6 +162,7 @@ #define MIDR_FUJITSU_A64FX MIDR_CPU_MODEL(ARM_CPU_IMP_FUJITSU, FUJITSU_CPU_PART_A64FX) #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110) #define MIDR_HISI_TSV200 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV200) +#define MIDR_HISI_LINXICORE9100 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_LINXICORE9100) #define MIDR_FT_1500A MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_1500A) #define MIDR_FT_2000AHK MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000AHK) #define MIDR_FT_2000PLUS MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000PLUS) diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 0955af96391b..7f175b3aac15 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -324,6 +324,13 @@ static const struct midr_range cavium_erratum_30115_cpus[] = { }; #endif

+#ifdef CONFIG_HISILICON_ERRATUM_162100125 +static const struct midr_range hisilicon_erratum_162100125_cpus[] = { + MIDR_REV(MIDR_HISI_LINXICORE9100, 0, 0), + {}, +}; +#endif + #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = { { @@ -519,6 +526,13 @@ const struct arm64_cpu_capabilities arm64_errata[] = { .cpu_enable = hisilicon_1980005_enable, }, #endif +#ifdef CONFIG_HISILICON_ERRATUM_162100125 + { + .desc = "Hisilicon erratum 162100125", + .capability = ARM64_WORKAROUND_HISILICON_ERRATUM_162100125, + ERRATA_MIDR_RANGE_LIST(hisilicon_erratum_162100125_cpus), + }, +#endif #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 { .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003", diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 3b746db0f40c..57631fa553f6 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1330,6 +1330,9 @@ has_useable_cnp(const struct arm64_cpu_capabilities *entry, int scope) if (is_kdump_kernel()) return false;

+ if (cpus_have_const_cap(ARM64_WORKAROUND_HISILICON_ERRATUM_162100125)) + return false; + return has_cpuid_feature(entry, scope); }