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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
Subject: [PATCH v2 6/6] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Thu, 21 Feb 2019 12:20:57 +0000	[thread overview]
Message-ID: <1550751657-30252-7-git-send-email-andrew.murray@arm.com> (raw)
In-Reply-To: <1550751657-30252-1-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 7e76c92..2f5d261 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1319,6 +1319,15 @@ 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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      parent reply	other threads:[~2019-02-21 12:22 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-21 12:20 [PATCH v2 0/6] Initial support for CVADP Andrew Murray
2019-02-21 12:20 ` [PATCH v2 1/6] arm64: Handle trapped DC CVADP Andrew Murray
2019-02-21 12:39   ` Mark Rutland
2019-02-21 12:20 ` [PATCH v2 2/6] arm64: HWCAP: add support for AT_HWCAP2 Andrew Murray
2019-02-21 18:45   ` Dave P Martin
2019-02-22 10:35     ` Szabolcs Nagy
2019-03-27 15:02       ` Andrew Murray
2019-03-27 15:24         ` Andrew Murray
2019-03-28 11:27           ` Dave Martin
2019-03-29 16:44             ` Szabolcs Nagy
2019-03-29 16:57               ` Phil Blundell
2019-04-01  8:14                 ` Andrew Murray
2019-03-27 14:53     ` Andrew Murray
2019-03-29 15:39   ` Dave Martin
2019-02-21 12:20 ` [PATCH v2 3/6] arm64: HWCAP: encapsulate elf_hwcap Andrew Murray
2019-02-21 18:45   ` Dave P Martin
2019-03-27 14:03     ` Andrew Murray
2019-03-28 11:32       ` Dave Martin
2019-02-21 12:20 ` [PATCH v2 4/6] arm64: Expose DC CVADP to userspace Andrew Murray
2019-02-21 12:20 ` [PATCH v2 5/6] arm64: add CVADP support to the cache maintenance helper Andrew Murray
2019-02-21 12:20 ` Andrew Murray [this message]

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