| Message ID | 20220909165938.3931307-3-james.morse@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: errata: remove BF16 HWCAP due to incorrect result on Cortex-A510 | expand |
On 09/09/2022 17:59, James Morse wrote: > 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>
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;
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> --- arch/arm64/include/asm/cpufeature.h | 2 ++ arch/arm64/kernel/cpufeature.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-)