diff options
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/Kconfig | 10 | ||||
| -rw-r--r-- | arch/arm64/include/asm/cpucaps.h | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 5 |
4 files changed, 24 insertions, 2 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 5656e7aacd69..e4e1b6550115 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -810,6 +810,16 @@ config QCOM_FALKOR_ERRATUM_E1041 If unsure, say Y. +config NVIDIA_CARMEL_CNP_ERRATUM + bool "NVIDIA Carmel CNP: CNP on Carmel semantically different than ARM cores" + default y + help + If CNP is enabled on Carmel cores, non-sharable TLBIs on a core will not + invalidate shared TLB entries installed by a different core, as it would + on standard ARM cores. + + If unsure, say Y. + config SOCIONEXT_SYNQUACER_PREITS bool "Socionext Synquacer: Workaround for GICv3 pre-ITS" default y diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index b77d997b173b..c40f2490cd7b 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -66,7 +66,8 @@ #define ARM64_WORKAROUND_1508412 58 #define ARM64_HAS_LDAPR 59 #define ARM64_KVM_PROTECTED_MODE 60 +#define ARM64_WORKAROUND_NVIDIA_CARMEL_CNP 61 -#define ARM64_NCAPS 61 +#define ARM64_NCAPS 62 #endif /* __ASM_CPUCAPS_H */ diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 506a1cd37973..e2c20c036442 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -526,6 +526,14 @@ const struct arm64_cpu_capabilities arm64_errata[] = { 1, 0), }, #endif +#ifdef CONFIG_NVIDIA_CARMEL_CNP_ERRATUM + { + /* NVIDIA Carmel */ + .desc = "NVIDIA Carmel CNP erratum", + .capability = ARM64_WORKAROUND_NVIDIA_CARMEL_CNP, + ERRATA_MIDR_ALL_VERSIONS(MIDR_NVIDIA_CARMEL), + }, +#endif { } }; diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 066030717a4c..2a5d9854d664 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1321,7 +1321,10 @@ has_useable_cnp(const struct arm64_cpu_capabilities *entry, int scope) * may share TLB entries with a CPU stuck in the crashed * kernel. */ - if (is_kdump_kernel()) + if (is_kdump_kernel()) + return false; + + if (cpus_have_const_cap(ARM64_WORKAROUND_NVIDIA_CARMEL_CNP)) return false; return has_cpuid_feature(entry, scope); |