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arm64: cpufeature: expose arm64_ftr_reg struct for CTR_EL0

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Expose the arm64_ftr_reg struct covering CTR_EL0 outside of cpufeature.o
so that other code can refer to it directly (i.e., without performing the
binary search)

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ard Biesheuvel 2016-08-31 11:31:10 +01:00 committed by Will Deacon
parent 6f2b7eeff9
commit 675b0563d6
2 changed files with 8 additions and 1 deletions
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2
arch/arm64/include/asm/cpufeature.h
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@ -78,6 +78,8 @@ struct arm64_ftr_reg {
const struct arm64_ftr_bits *ftr_bits;
};
extern struct arm64_ftr_reg arm64_ftr_reg_ctrel0;
/* scope of capability check */
enum {
SCOPE_SYSTEM,

7
arch/arm64/kernel/cpufeature.c
View File

@ -155,6 +155,11 @@ static const struct arm64_ftr_bits ftr_ctr[] = {
ARM64_FTR_END,
};
struct arm64_ftr_reg arm64_ftr_reg_ctrel0 = {
.name = "SYS_CTR_EL0",
.ftr_bits = ftr_ctr
};
static const struct arm64_ftr_bits ftr_id_mmfr0[] = {
S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 4, 0xf), /* InnerShr */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 24, 4, 0), /* FCSE */
@ -318,7 +323,7 @@ static const struct __ftr_reg_entry {
ARM64_FTR_REG(SYS_ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2),
/* Op1 = 3, CRn = 0, CRm = 0 */
ARM64_FTR_REG(SYS_CTR_EL0, ftr_ctr),
{ SYS_CTR_EL0, &arm64_ftr_reg_ctrel0 },
ARM64_FTR_REG(SYS_DCZID_EL0, ftr_dczid),
/* Op1 = 3, CRn = 14, CRm = 0 */