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KVM: arm64: Expose FEAT_MTE_TAGGED_FAR feature to guest

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expose FEAT_MTE_TAGGED_FAR feature to guest.

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250618084513.1761345-4-yeoreum.yun@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Yeoreum Yun 2025-06-18 09:45:06 +01:00 committed by Catalin Marinas
parent 7c7f55039b
commit 61eae495da
1 changed files with 5 additions and 3 deletions
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8
arch/arm64/kvm/sys_regs.c
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@ -1617,8 +1617,8 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu,
val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_MPAM_frac);
break;
case SYS_ID_AA64PFR2_EL1:
/* We only expose FPMR */
val &= ID_AA64PFR2_EL1_FPMR;
val &= ID_AA64PFR2_EL1_FPMR |
(kvm_has_mte(vcpu->kvm) ? ID_AA64PFR2_EL1_MTEFAR : 0);
break;
case SYS_ID_AA64ISAR1_EL1:
if (!vcpu_has_ptrauth(vcpu))
@ -2876,7 +2876,9 @@ static const struct sys_reg_desc sys_reg_descs[] = {
ID_AA64PFR1_EL1_MPAM_frac |
ID_AA64PFR1_EL1_RAS_frac |
ID_AA64PFR1_EL1_MTE)),
ID_WRITABLE(ID_AA64PFR2_EL1, ID_AA64PFR2_EL1_FPMR),
ID_WRITABLE(ID_AA64PFR2_EL1,
ID_AA64PFR2_EL1_FPMR |
ID_AA64PFR2_EL1_MTEFAR),
ID_UNALLOCATED(4,3),
ID_WRITABLE(ID_AA64ZFR0_EL1, ~ID_AA64ZFR0_EL1_RES0),
ID_HIDDEN(ID_AA64SMFR0_EL1),