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| author | James Morse <james.morse@arm.com> | 2022-09-09 17:59:37 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-09-16 15:16:34 +0100 |
| commit | 445c953e4a84b2942bdb5c0b5aff571c903680fe (patch) | |
| tree | 66c8d402dd1023e2dbb0ac178d1cc4c3df1d440f /arch | |
| parent | 237405ebef580a7352a52129b2465c117145eafa (diff) | |
| download | lwn-445c953e4a84b2942bdb5c0b5aff571c903680fe.tar.gz lwn-445c953e4a84b2942bdb5c0b5aff571c903680fe.zip | |
arm64: cpufeature: Expose get_arm64_ftr_reg() outside cpufeature.c
get_arm64_ftr_reg() returns the properties of a system register based
on its instruction encoding.
This is needed by erratum workaround in cpu_errata.c to modify the
user-space visible view of id registers.
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20220909165938.3931307-3-james.morse@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index fd7d75a275f6..5c3317bc06c7 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -907,6 +907,8 @@ static inline unsigned int get_vmid_bits(u64 mmfr1) return 8; } +struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id); + extern struct arm64_ftr_override id_aa64mmfr1_override; extern struct arm64_ftr_override id_aa64pfr0_override; extern struct arm64_ftr_override id_aa64pfr1_override; diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b6a4e97805a4..24f43ad02cd3 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -750,7 +750,7 @@ static struct arm64_ftr_reg *get_arm64_ftr_reg_nowarn(u32 sys_id) * returns - Upon success, matching ftr_reg entry for id. * - NULL on failure but with an WARN_ON(). */ -static struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id) +struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id) { struct arm64_ftr_reg *reg; |