From: Andrew Murray <andrew.murray@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Cc: Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
dave.martin@arm.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Wed, 6 Feb 2019 13:31:08 +0000 [thread overview]
Message-ID: <1549459868-45992-7-git-send-email-andrew.murray@arm.com> (raw)
In-Reply-To: <1549459868-45992-1-git-send-email-andrew.murray@arm.com>
Advertise ARM64_HAS_DCPOP when both DC CVAP and DC CVADP are supported.
Signed-off-by: Andrew Murray <andrew.murray@arm.com>
---
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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prev parent reply other threads:[~2019-02-06 13:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-06 13:31 [PATCH 0/6] Initial support for CVADP Andrew Murray
2019-02-06 13:31 ` [PATCH 1/6] arm64: Handle trapped DC CVADP Andrew Murray
2019-02-06 13:31 ` [PATCH 2/6] arm64: HWCAP: add support for ELF_HWCAP2 Andrew Murray
2019-02-07 11:31 ` Dave Martin
2019-02-18 15:32 ` Andrew Murray
2019-02-18 16:02 ` Dave Martin
2019-02-19 16:52 ` Andrew Murray
2019-02-06 13:31 ` [PATCH 3/6] arm64: HWCAP: encapsulate elf_hwcap Andrew Murray
2019-02-07 11:47 ` Dave Martin
2019-02-18 15:46 ` Andrew Murray
2019-02-18 16:05 ` Dave Martin
2019-02-06 13:31 ` [PATCH 4/6] arm64: Expose DC CVADP to userspace Andrew Murray
2019-02-06 13:31 ` [PATCH 5/6] arm64: add CVADP support to the cache maintenance helper Andrew Murray
2019-02-06 13:31 ` Andrew Murray [this message]
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