[v5,6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Commit Message
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>
---
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/kernel/cpufeature.c | 10 ++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
@@ -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 */
@@ -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
{