diff mbox series

[v6,07/12] KVM: arm64: Simplify masking out MTE in feature id reg

Message ID 20210922124704.600087-8-tabba@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: arm64: Fixed features for protected VMs | expand

Commit Message

Fuad Tabba Sept. 22, 2021, 12:46 p.m. UTC 
Simplify code for hiding MTE support in feature id register when
MTE is not enabled/supported by KVM.

No functional change intended.

Signed-off-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
---
 arch/arm64/kvm/sys_regs.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 1d46e185f31e..447acce9ca84 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1077,14 +1077,8 @@  static u64 read_id_reg(const struct kvm_vcpu *vcpu,
 		val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_CSV3), (u64)vcpu->kvm->arch.pfr0_csv3);
 		break;
 	case SYS_ID_AA64PFR1_EL1:
-		val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_MTE);
-		if (kvm_has_mte(vcpu->kvm)) {
-			u64 pfr, mte;
-
-			pfr = read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1);
-			mte = cpuid_feature_extract_unsigned_field(pfr, ID_AA64PFR1_MTE_SHIFT);
-			val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR1_MTE), mte);
-		}
+		if (!kvm_has_mte(vcpu->kvm))
+			val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_MTE);
 		break;
 	case SYS_ID_AA64ISAR1_EL1:
 		if (!vcpu_has_ptrauth(vcpu))