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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-07-04 23:07:46 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-07-05 10:20:59 +0100 |
| commit | 314d53d297980676011e6fd83dac60db4a01dc70 (patch) | |
| tree | 201eddf7774afbd9ef20845a69f091aeef94e056 /arch/arm64/kernel/cpu_errata.c | |
| parent | 4c4a39dd5fe2d13e2d2fa5fceb8ef95d19fc389a (diff) | |
| download | linux-314d53d297980676011e6fd83dac60db4a01dc70.tar.gz linux-314d53d297980676011e6fd83dac60db4a01dc70.tar.bz2 linux-314d53d297980676011e6fd83dac60db4a01dc70.zip | |
arm64: Handle mismatched cache type
Track mismatches in the cache type register (CTR_EL0), other
than the D/I min line sizes and trap user accesses if there are any.
Fixes: be68a8aaf925 ("arm64: cpufeature: Fix CTR_EL0 field definitions")
Cc: <stable@vger.kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/cpu_errata.c')
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 5d1fa928ea4b..5d59ff9a8da9 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -65,11 +65,15 @@ is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope) } static bool -has_mismatched_cache_line_size(const struct arm64_cpu_capabilities *entry, - int scope) +has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry, + int scope) { u64 mask = CTR_CACHE_MINLINE_MASK; + /* Skip matching the min line sizes for cache type check */ + if (entry->capability == ARM64_MISMATCHED_CACHE_TYPE) + mask ^= arm64_ftr_reg_ctrel0.strict_mask; + WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); return (read_cpuid_cachetype() & mask) != (arm64_ftr_reg_ctrel0.sys_val & mask); @@ -615,7 +619,14 @@ const struct arm64_cpu_capabilities arm64_errata[] = { { .desc = "Mismatched cache line size", .capability = ARM64_MISMATCHED_CACHE_LINE_SIZE, - .matches = has_mismatched_cache_line_size, + .matches = has_mismatched_cache_type, + .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, + .cpu_enable = cpu_enable_trap_ctr_access, + }, + { + .desc = "Mismatched cache type", + .capability = ARM64_MISMATCHED_CACHE_TYPE, + .matches = has_mismatched_cache_type, .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, .cpu_enable = cpu_enable_trap_ctr_access, }, |