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arm64: Advertise ARM64_HAS_DCPODP cpu feature 

Advertise ARM64_HAS_DCPODP when both DC CVAP and DC CVADP are supported.

Even though we don't use this feature now, we provide it for consistency
with DCPOP and anticipate it being used in the future.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
hifive-unleashed-5.2
Andrew Murray 2019-04-09 10:52:45 +01:00 committed by Will Deacon
parent 04a1438e56
commit b9585f53bc
2 changed files with 12 additions and 1 deletions
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3
arch/arm64/include/asm/cpucaps.h
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@ -61,7 +61,8 @@
#define ARM64_HAS_GENERIC_AUTH_ARCH 40
#define ARM64_HAS_GENERIC_AUTH_IMP_DEF 41
#define ARM64_HAS_IRQ_PRIO_MASKING 42
#define ARM64_HAS_DCPODP 43
#define ARM64_NCAPS 43
#define ARM64_NCAPS 44
#endif /* __ASM_CPUCAPS_H */

10
arch/arm64/kernel/cpufeature.c
View File

@ -1340,6 +1340,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.field_pos = ID_AA64ISAR1_DPB_SHIFT,
.min_field_value = 1,
},
{
.desc = "Data cache clean to Point of Deep Persistence",
.capability = ARM64_HAS_DCPODP,
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.matches = has_cpuid_feature,
.sys_reg = SYS_ID_AA64ISAR1_EL1,
.sign = FTR_UNSIGNED,
.field_pos = ID_AA64ISAR1_DPB_SHIFT,
.min_field_value = 2,
},
#endif
#ifdef CONFIG_ARM64_SVE
{