Commit 61eae495 authored by Yeoreum Yun's avatar Yeoreum Yun Committed by Catalin Marinas
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KVM: arm64: Expose FEAT_MTE_TAGGED_FAR feature to guest 



expose FEAT_MTE_TAGGED_FAR 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/20250618084513.1761345-4-yeoreum.yun@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 7c7f5503

arch/arm64/kvm/sys_regs.c

+5 −3
Original line number Diff line number Diff line
@@ -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),