[PATCH 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
From: Andrew Murray <hidden>
Date: 2019-02-06 13:33:19
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Advertise ARM64_HAS_DCPOP when both DC CVAP and DC CVADP are supported. Signed-off-by: Andrew Murray <redacted> --- arch/arm64/include/asm/cpucaps.h | 3 ++- arch/arm64/kernel/cpufeature.c | 9 +++++++++ 2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index 82e9099..4a2a77d 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h@@ -60,7 +60,8 @@ #define ARM64_HAS_ADDRESS_AUTH_IMP_DEF 39 #define ARM64_HAS_GENERIC_AUTH_ARCH 40 #define ARM64_HAS_GENERIC_AUTH_IMP_DEF 41 +#define ARM64_HAS_DCPODP 42 -#define ARM64_NCAPS 42 +#define ARM64_NCAPS 43 #endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 4c0c5b9..ae28f02 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c@@ -1320,6 +1320,15 @@ 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, + .field_pos = ID_AA64ISAR1_DPB_SHIFT, + .min_field_value = 2, + }, #endif #ifdef CONFIG_ARM64_SVE {
--
2.7.4
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