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, Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
linux-api@vger.kernel.org, Phil Blundell <pb@pbcl.net>,
dave.martin@arm.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 6/7] arm64: Advertise ARM64_HAS_DCPODP cpu feature
Date: Mon, 1 Apr 2019 11:45:14 +0100 [thread overview]
Message-ID: <20190401104515.39775-7-andrew.murray@arm.com> (raw)
In-Reply-To: <20190401104515.39775-1-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 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 5e27d2dbe45e..c74b25895c43 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1339,6 +1339,15 @@ 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
{
--
2.21.0
next prev parent reply other threads:[~2019-04-01 10:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-01 10:45 [PATCH v3 0/7] arm64: Initial support for CVADP Andrew Murray
2019-04-01 10:45 ` [PATCH v3 1/7] arm64: Handle trapped DC CVADP Andrew Murray
2019-04-01 10:45 ` [PATCH v3 2/7] arm64: HWCAP: add support for AT_HWCAP2 Andrew Murray
2019-04-02 14:58 ` Dave Martin
2019-04-03 8:32 ` Andrew Murray
2019-04-03 9:11 ` Dave Martin
2019-04-03 9:29 ` Andrew Murray
2019-04-03 9:35 ` Dave Martin
2019-04-01 10:45 ` [PATCH v3 3/7] arm64: HWCAP: encapsulate elf_hwcap Andrew Murray
2019-04-02 14:58 ` Dave Martin
2019-04-02 15:06 ` Andrew Murray
2019-04-02 15:32 ` Suzuki K Poulose
2019-04-02 15:55 ` Dave Martin
2019-04-03 8:53 ` Andrew Murray
2019-04-03 9:13 ` Dave Martin
2019-04-01 10:45 ` [PATCH v3 4/7] arm64: Expose DC CVADP to userspace Andrew Murray
2019-04-01 10:45 ` [PATCH v3 5/7] arm64: add CVADP support to the cache maintenance helper Andrew Murray
2019-04-01 10:45 ` Andrew Murray [this message]
2019-04-02 14:59 ` [PATCH v3 6/7] arm64: Advertise ARM64_HAS_DCPODP cpu feature Dave Martin
2019-04-03 9:23 ` Andrew Murray
2019-04-03 9:32 ` Dave Martin
2019-04-03 9:57 ` Andrew Murray
2019-04-01 10:45 ` [PATCH v3 7/7] arm64: docs: document AT_HWCAP2 and unused AT_HWCAP bits Andrew Murray
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