Commit 7502bdb4 authored by Yeoreum Yun's avatar Yeoreum Yun Committed by Catalin Marinas
Browse files

KVM: arm64: Expose MTE_STORE_ONLY feature to guest 



expose MTE_STORE_ONLY feature to guest.

Signed-off-by: default avatarYeoreum Yun <yeoreum.yun@arm.com>
Acked-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250618092957.2069907-6-yeoreum.yun@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent f6203722

arch/arm64/kvm/sys_regs.c

+5 −2
Original line number Diff line number Diff line
@@ -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),