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KVM: arm64: Expose MTE_STORE_ONLY feature to guest

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expose MTE_STORE_ONLY 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/20250618092957.2069907-6-yeoreum.yun@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Yeoreum Yun 2025-06-18 10:29:54 +01:00 committed by Catalin Marinas
parent f620372209
commit 7502bdb43a
1 changed files with 5 additions and 2 deletions
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7
arch/arm64/kvm/sys_regs.c
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@ -1618,7 +1618,9 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu,
break;
case SYS_ID_AA64PFR2_EL1:
val &= ID_AA64PFR2_EL1_FPMR |
(kvm_has_mte(vcpu->kvm) ? ID_AA64PFR2_EL1_MTEFAR : 0);
(kvm_has_mte(vcpu->kvm) ?
ID_AA64PFR2_EL1_MTEFAR | ID_AA64PFR2_EL1_MTESTOREONLY :
0);
break;
case SYS_ID_AA64ISAR1_EL1:
if (!vcpu_has_ptrauth(vcpu))
@ -2878,7 +2880,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
ID_AA64PFR1_EL1_MTE)),
ID_WRITABLE(ID_AA64PFR2_EL1,
ID_AA64PFR2_EL1_FPMR |
ID_AA64PFR2_EL1_MTEFAR),
ID_AA64PFR2_EL1_MTEFAR |
ID_AA64PFR2_EL1_MTESTOREONLY),
ID_UNALLOCATED(4,3),
ID_WRITABLE(ID_AA64ZFR0_EL1, ~ID_AA64ZFR0_EL1_RES0),
ID_HIDDEN(ID_AA64SMFR0_EL1),