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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,
	Mark Rutland <mark.rutland@arm.com>, Phil Blundell <pb@pbcl.net>,
	libc-alpha@sourceware.org, linux-api@vger.kernel.org,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH v5 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Tue,  9 Apr 2019 10:52:45 +0100	[thread overview]
Message-ID: <20190409095245.42524-7-andrew.murray@arm.com> (raw)
In-Reply-To: <20190409095245.42524-1-andrew.murray@arm.com>

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(-)

diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index f6a76e43f39e..defdc67d9ab4 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -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 */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index f8b682a3a9f4..9d18e45311fd 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -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
 	{
-- 
2.21.0

WARNING: multiple messages have this Message-ID (diff)
From: Andrew Murray <andrew.murray@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	libc-alpha@sourceware.org,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
	linux-api@vger.kernel.org, Phil Blundell <pb@pbcl.net>,
	Dave Martin <Dave.Martin@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Tue,  9 Apr 2019 10:52:45 +0100	[thread overview]
Message-ID: <20190409095245.42524-7-andrew.murray@arm.com> (raw)
In-Reply-To: <20190409095245.42524-1-andrew.murray@arm.com>

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(-)

diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index f6a76e43f39e..defdc67d9ab4 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -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 */
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index f8b682a3a9f4..9d18e45311fd 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -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
 	{
-- 
2.21.0


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  parent reply	other threads:[~2019-04-09  9:52 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-09  9:52 [PATCH v5 0/6] arm64: Initial support for CVADP Andrew Murray
2019-04-09  9:52 ` Andrew Murray
2019-04-09  9:52 ` [PATCH v5 1/6] arm64: HWCAP: add support for AT_HWCAP2 Andrew Murray
2019-04-09  9:52   ` Andrew Murray
2019-04-16 13:51   ` Will Deacon
2019-04-16 13:51     ` Will Deacon
2019-04-16 16:30     ` Dave Martin
2019-04-16 16:30       ` Dave Martin
2019-04-30 11:09       ` Andrew Murray
2019-04-30 11:09         ` Andrew Murray
2019-04-09  9:52 ` [PATCH v5 2/6] arm64: HWCAP: encapsulate elf_hwcap Andrew Murray
2019-04-09  9:52   ` Andrew Murray
2019-04-09  9:52 ` [PATCH v5 3/6] arm64: Handle trapped DC CVADP Andrew Murray
2019-04-09  9:52   ` Andrew Murray
2019-04-09  9:52 ` [PATCH v5 4/6] arm64: Expose DC CVADP to userspace Andrew Murray
2019-04-09  9:52   ` Andrew Murray
2019-04-09  9:52 ` [PATCH v5 5/6] arm64: add CVADP support to the cache maintenance helper Andrew Murray
2019-04-09  9:52   ` Andrew Murray
2019-04-09  9:52 ` Andrew Murray [this message]
2019-04-09  9:52   ` [PATCH v5 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature Andrew Murray

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