From: Suzuki K Poulose suzuki.poulose@arm.com
mainline inclusion from mainline-v5.0-rc1 commit c9460dcb06ee68af1c75f9232603ece071901abe category: bugfix bugzilla: 46773 CVE: NA References: https://gitee.com/src-openeuler/kernel/issues/I235Y8
---------------------------
We have two entries for ARM64_WORKAROUND_CLEAN_CACHE capability :
1) ARM Errata 826319, 827319, 824069, 819472 on A53 r0p[012] 2) ARM Errata 819472 on A53 r0p[01]
Both have the same work around. Merge these entries to avoid duplicate entries for a single capability. Add a new Kconfig entry to control the "capability" entry to make it easier to handle combinations of the CONFIGs.
Cc: Will Deacon will.deacon@arm.com Cc: Andre Przywara andre.przywara@arm.com Cc: Mark Rutland mark.rutland@arm.com Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Signed-off-by: Will Deacon will.deacon@arm.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- arch/arm64/Kconfig | 7 +++++++ arch/arm64/include/asm/cputype.h | 1 + arch/arm64/kernel/cpu_errata.c | 28 ++++++++++++++++------------ 3 files changed, 24 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index be2f23c8fdf9..c22d1d187f16 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -322,9 +322,13 @@ menu "Kernel Features"
menu "ARM errata workarounds via the alternatives framework"
+config ARM64_WORKAROUND_CLEAN_CACHE + def_bool n + config ARM64_ERRATUM_826319 bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted" default y + select ARM64_WORKAROUND_CLEAN_CACHE help This option adds an alternative code sequence to work around ARM erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or @@ -346,6 +350,7 @@ config ARM64_ERRATUM_826319 config ARM64_ERRATUM_827319 bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect" default y + select ARM64_WORKAROUND_CLEAN_CACHE help This option adds an alternative code sequence to work around ARM erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI @@ -367,6 +372,7 @@ config ARM64_ERRATUM_827319 config ARM64_ERRATUM_824069 bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop" default y + select ARM64_WORKAROUND_CLEAN_CACHE help This option adds an alternative code sequence to work around ARM erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected @@ -389,6 +395,7 @@ config ARM64_ERRATUM_824069 config ARM64_ERRATUM_819472 bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption" default y + select ARM64_WORKAROUND_CLEAN_CACHE help This option adds an alternative code sequence to work around ARM erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 557d838f829c..6e33bee39934 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -150,6 +150,7 @@ struct midr_range { .rv_max = MIDR_CPU_VAR_REV(v_max, r_max), \ }
+#define MIDR_REV_RANGE(m, v, r_min, r_max) MIDR_RANGE(m, v, r_min, v, r_max) #define MIDR_ALL_VERSIONS(m) MIDR_RANGE(m, 0, 0, 0xf, 0xf)
static inline bool midr_is_cpu_model_range(u32 midr, u32 model, u32 rv_min, diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 216126da5bb4..a9c772e85272 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -643,24 +643,28 @@ static const struct midr_range arm64_harden_el2_vectors[] = {
#endif
-const struct arm64_cpu_capabilities arm64_errata[] = { +#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE +static const struct midr_range workaround_clean_cache[] = { #if defined(CONFIG_ARM64_ERRATUM_826319) || \ defined(CONFIG_ARM64_ERRATUM_827319) || \ defined(CONFIG_ARM64_ERRATUM_824069) - { - /* Cortex-A53 r0p[012] */ - .desc = "ARM errata 826319, 827319, 824069", - .capability = ARM64_WORKAROUND_CLEAN_CACHE, - ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2), - .cpu_enable = cpu_enable_cache_maint_trap, - }, + /* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */ + MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2), +#endif +#ifdef CONFIG_ARM64_ERRATUM_819472 + /* Cortex-A53 r0p[01] : ARM errata 819472 */ + MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1), #endif -#ifdef CONFIG_ARM64_ERRATUM_819472 + {}, +}; +#endif + +const struct arm64_cpu_capabilities arm64_errata[] = { +#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE { - /* Cortex-A53 r0p[01] */ - .desc = "ARM errata 819472", + .desc = "ARM errata 826319, 827319, 824069, 819472", .capability = ARM64_WORKAROUND_CLEAN_CACHE, - ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1), + ERRATA_MIDR_RANGE_LIST(workaround_clean_cache), .cpu_enable = cpu_enable_cache_maint_trap, }, #endif