diff options
| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-03-26 15:12:45 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-03-26 18:01:42 +0100 |
| commit | be5b299830c63ed76e0357473c4218c85fb388b3 (patch) | |
| tree | 9b64409be2dc85d787b6d7224d3bcb4cb235aa18 /arch/arm64/include | |
| parent | arm64: Add helpers for checking CPU MIDR against a range (diff) | |
| download | linux-dev-be5b299830c63ed76e0357473c4218c85fb388b3.tar.xz linux-dev-be5b299830c63ed76e0357473c4218c85fb388b3.zip | |
arm64: capabilities: Add support for checks based on a list of MIDRs
Add helpers for detecting an errata on list of midr ranges
of affected CPUs, with the same work around.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Dave Martin <dave.martin@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/include')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/cputype.h | 9 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index cd245871b578..a16eb0731290 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -314,6 +314,7 @@ struct arm64_cpu_capabilities { } * const fixed_revs; }; + const struct midr_range *midr_range_list; struct { /* Feature register checking */ u32 sys_reg; u8 field_pos; diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index bf6cfdab743f..e86e65c187f8 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -147,6 +147,15 @@ static inline bool is_midr_in_range(u32 midr, struct midr_range const *range) range->rv_min, range->rv_max); } +static inline bool +is_midr_in_range_list(u32 midr, struct midr_range const *ranges) +{ + while (ranges->model) + if (is_midr_in_range(midr, ranges++)) + return true; + return false; +} + /* * The CPU ID never changes at run time, so we might as well tell the * compiler that it's constant. Use this function to read the CPU ID |