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Subject[PATCH V4 11/17] arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register
Date
Enable the following features bits in ID_AA64PFR1 register as per ARM DDI
0487F.a specification.

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: Will Deacon <will@kernel.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arm64/include/asm/sysreg.h | 4 ++++
arch/arm64/kernel/cpufeature.c | 2 ++
2 files changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 638f6108860f..fa9d02ca4b25 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -670,7 +670,11 @@
#define ID_AA64PFR0_EL0_32BIT_64BIT 0x2

/* id_aa64pfr1 */
+#define ID_AA64PFR1_MPAMFRAC_SHIFT 16
+#define ID_AA64PFR1_RASFRAC_SHIFT 12
+#define ID_AA64PFR1_MTE_SHIFT 8
#define ID_AA64PFR1_SSBS_SHIFT 4
+#define ID_AA64PFR1_BT_SHIFT 0

#define ID_AA64PFR1_SSBS_PSTATE_NI 0
#define ID_AA64PFR1_SSBS_PSTATE_ONLY 1
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 39fd6cc64796..d1433f996710 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -238,6 +238,8 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
};

static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_MPAMFRAC_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_RASFRAC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_SSBS_SHIFT, 4, ID_AA64PFR1_SSBS_PSTATE_NI),
ARM64_FTR_END,
};
--
2.20.1
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