From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: mark.rutland@arm.com, suzuki.poulose@arm.com,
catalin.marinas@arm.com,
Anshuman Khandual <anshuman.khandual@arm.com>,
linux-kernel@vger.kernel.org, maz@kernel.org, will@kernel.org
Subject: [PATCH V2 08/16] arm64/cpufeature: Add remaining feature bits in ID_MMFR4 register
Date: Tue, 14 Apr 2020 15:18:22 +0530 [thread overview]
Message-ID: <1586857710-17154-9-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1586857710-17154-1-git-send-email-anshuman.khandual@arm.com>
Enable all remaining feature bits like EVT, CCIDX, LSM, HPDS, CnP, XNX,
SpecSEI in ID_MMFR4 register per ARM DDI 0487F.a.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arm64/include/asm/sysreg.h | 8 ++++++++
arch/arm64/kernel/cpufeature.c | 13 +++++++++++++
2 files changed, 21 insertions(+)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 32b7539b965f..8a2421a0d76a 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -778,6 +778,14 @@
#define ID_ISAR6_DP_SHIFT 4
#define ID_ISAR6_JSCVT_SHIFT 0
+#define ID_MMFR4_EVT_SHIFT 28
+#define ID_MMFR4_CCIDX_SHIFT 24
+#define ID_MMFR4_LSM_SHIFT 20
+#define ID_MMFR4_HPDS_SHIFT 16
+#define ID_MMFR4_CNP_SHIFT 12
+#define ID_MMFR4_XNX_SHIFT 8
+#define ID_MMFR4_SPECSEI_SHIFT 0
+
#define ID_MMFR5_ETS_SHIFT 0
#define ID_PFR0_DIT_SHIFT 24
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 8b289a6815eb..7de6abbafb35 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -338,7 +338,20 @@ static const struct arm64_ftr_bits ftr_id_isar5[] = {
};
static const struct arm64_ftr_bits ftr_id_mmfr4[] = {
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_EVT_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_CCIDX_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_LSM_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_HPDS_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_CNP_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR4_XNX_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 4, 4, 0), /* ac2 */
+ /*
+ * SpecSEI = 1 indicates that the PE might generate an SError on an
+ * external abort on speculative read. It is safe to assume that an
+ * SError might be generated than it will not be. Hence it has been
+ * classified as FTR_HIGHER_SAFE.
+ */
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_HIGHER_SAFE, ID_MMFR4_SPECSEI_SHIFT, 4, 0),
ARM64_FTR_END,
};
--
2.20.1
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next prev parent reply other threads:[~2020-04-14 9:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 9:48 [PATCH V2 00/16] arm64/cpufeature: Introduce ID_PFR2, ID_DFR1, ID_MMFR5 and other changes Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 01/16] arm64/cpufeature: Add explicit ftr_id_isar0[] for ID_ISAR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 02/16] arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 03/16] arm64/cpufeature: Make doublelock a signed feature in ID_AA64DFR0 Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 04/16] arm64/cpufeature: Introduce ID_PFR2 CPU register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 05/16] arm64/cpufeature: Introduce ID_DFR1 " Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 06/16] arm64/cpufeature: Introduce ID_MMFR5 " Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 07/16] arm64/cpufeature: Add remaining feature bits in ID_PFR0 register Anshuman Khandual
2020-04-14 9:48 ` Anshuman Khandual [this message]
2020-04-14 9:48 ` [PATCH V2 09/16] arm64/cpufeature: Add remaining feature bits in ID_AA64ISAR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 10/16] arm64/cpufeature: Add remaining feature bits in ID_AA64PFR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 11/16] arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 12/16] arm64/cpufeature: Add remaining feature bits in ID_AA64MMFR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 13/16] arm64/cpufeature: Add remaining feature bits in ID_AA64MMFR1 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 14/16] arm64/cpufeature: Add remaining feature bits in ID_AA64MMFR2 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 15/16] arm64/cpufeature: Add remaining feature bits in ID_AA64DFR0 register Anshuman Khandual
2020-04-14 9:48 ` [PATCH V2 16/16] arm64/cpufeature: Replace all open bits shift encodings with macros Anshuman Khandual
2020-04-29 9:37 ` [PATCH V2 00/16] arm64/cpufeature: Introduce ID_PFR2, ID_DFR1, ID_MMFR5 and other changes Anshuman Khandual
2020-04-29 21:26 ` Will Deacon
2020-04-30 2:59 ` Anshuman Khandual
2020-04-30 16:47 ` Will Deacon
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