KVM: arm64: Add feature register flag definitions

Add feature register flag definitions to clarify which features
might be supported.

Consolidate the various ID_AA64PFR0_ELx flags for all ELs.

No functional change intended.

Signed-off-by: Fuad Tabba <tabba@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210817081134.2918285-10-tabba@google.com

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 9bb9d11..b7d9bb1 100644 (file)
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -602,14 +602,14 @@ static inline bool id_aa64pfr0_32bit_el1(u64 pfr0)
 {
        u32 val = cpuid_feature_extract_unsigned_field(pfr0, ID_AA64PFR0_EL1_SHIFT);
 
-       return val == ID_AA64PFR0_EL1_32BIT_64BIT;
+       return val == ID_AA64PFR0_ELx_32BIT_64BIT;
 }
 
 static inline bool id_aa64pfr0_32bit_el0(u64 pfr0)
 {
        u32 val = cpuid_feature_extract_unsigned_field(pfr0, ID_AA64PFR0_EL0_SHIFT);
 
-       return val == ID_AA64PFR0_EL0_32BIT_64BIT;
+       return val == ID_AA64PFR0_ELx_32BIT_64BIT;
 }
 
 static inline bool id_aa64pfr0_sve(u64 pfr0)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 53a93a9..f84a00f 100644 (file)
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -784,14 +784,13 @@
 #define ID_AA64PFR0_AMU                        0x1
 #define ID_AA64PFR0_SVE                        0x1
 #define ID_AA64PFR0_RAS_V1             0x1
+#define ID_AA64PFR0_RAS_V1P1           0x2
 #define ID_AA64PFR0_FP_NI              0xf
 #define ID_AA64PFR0_FP_SUPPORTED       0x0
 #define ID_AA64PFR0_ASIMD_NI           0xf
 #define ID_AA64PFR0_ASIMD_SUPPORTED    0x0
-#define ID_AA64PFR0_EL1_64BIT_ONLY     0x1
-#define ID_AA64PFR0_EL1_32BIT_64BIT    0x2
-#define ID_AA64PFR0_EL0_64BIT_ONLY     0x1
-#define ID_AA64PFR0_EL0_32BIT_64BIT    0x2
+#define ID_AA64PFR0_ELx_64BIT_ONLY     0x1
+#define ID_AA64PFR0_ELx_32BIT_64BIT    0x2
 
 /* id_aa64pfr1 */
 #define ID_AA64PFR1_MPAMFRAC_SHIFT     16
@@ -847,12 +846,16 @@
 #define ID_AA64MMFR0_ASID_SHIFT                4
 #define ID_AA64MMFR0_PARANGE_SHIFT     0
 
+#define ID_AA64MMFR0_ASID_8            0x0
+#define ID_AA64MMFR0_ASID_16           0x2
+
 #define ID_AA64MMFR0_TGRAN4_NI         0xf
 #define ID_AA64MMFR0_TGRAN4_SUPPORTED  0x0
 #define ID_AA64MMFR0_TGRAN64_NI                0xf
 #define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0
 #define ID_AA64MMFR0_TGRAN16_NI                0x0
 #define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1
+#define ID_AA64MMFR0_PARANGE_40                0x2
 #define ID_AA64MMFR0_PARANGE_48                0x5
 #define ID_AA64MMFR0_PARANGE_52                0x6
 
@@ -900,6 +903,7 @@
 #define ID_AA64MMFR2_CNP_SHIFT         0
 
 /* id_aa64dfr0 */
+#define ID_AA64DFR0_MTPMU_SHIFT                48
 #define ID_AA64DFR0_TRBE_SHIFT         44
 #define ID_AA64DFR0_TRACE_FILT_SHIFT   40
 #define ID_AA64DFR0_DOUBLELOCK_SHIFT   36

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 0ead8bf..5b59fe5 100644 (file)
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -239,8 +239,8 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
        S_ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR0_FP_SHIFT, 4, ID_AA64PFR0_FP_NI),
        ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL3_SHIFT, 4, 0),
        ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL2_SHIFT, 4, 0),
-       ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_SHIFT, 4, ID_AA64PFR0_EL1_64BIT_ONLY),
-       ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL0_SHIFT, 4, ID_AA64PFR0_EL0_64BIT_ONLY),
+       ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL1_SHIFT, 4, ID_AA64PFR0_ELx_64BIT_ONLY),
+       ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_EL0_SHIFT, 4, ID_AA64PFR0_ELx_64BIT_ONLY),
        ARM64_FTR_END,
 };
 
@@ -1956,7 +1956,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
                .sys_reg = SYS_ID_AA64PFR0_EL1,
                .sign = FTR_UNSIGNED,
                .field_pos = ID_AA64PFR0_EL0_SHIFT,
-               .min_field_value = ID_AA64PFR0_EL0_32BIT_64BIT,
+               .min_field_value = ID_AA64PFR0_ELx_32BIT_64BIT,
        },
 #ifdef CONFIG_KVM
        {
@@ -1967,7 +1967,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
                .sys_reg = SYS_ID_AA64PFR0_EL1,
                .sign = FTR_UNSIGNED,
                .field_pos = ID_AA64PFR0_EL1_SHIFT,
-               .min_field_value = ID_AA64PFR0_EL1_32BIT_64BIT,
+               .min_field_value = ID_AA64PFR0_ELx_32BIT_64BIT,
        },
        {
                .desc = "Protected KVM",