[PATCH V3 11/16] arm64/cpufeature: Add remaining feature bits in ID_AA64PFR1 register

From: Anshuman Khandual
Date: Sat May 02 2020 - 09:35:54 EST


Enable the following features bits in ID_AA64PFR1 register as per ARM DDI
0487F.a specification.

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

Suggested-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
arch/arm64/include/asm/sysreg.h | 4 ++++
arch/arm64/kernel/cpufeature.c | 4 ++++
2 files changed, 8 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index c93ea6613f51..f1c0d874220a 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -666,7 +666,11 @@
#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 f5a39e040804..181e09d62147 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -233,7 +233,11 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
};

static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = {
+ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_MPAMFRAC_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_RASFRAC_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_MTE_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_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_BT_SHIFT, 4, 0),
ARM64_FTR_END,
};

--
2.20.1