Commit 94893fc9 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Limit the debug architecture to ARMv8.0 



Let's not pretend we support anything but ARMv8.0 as far as the
debug architecture is concerned.

Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarAlexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent c8857935

arch/arm64/kvm/sys_regs.c

+3 −0
Original line number Diff line number Diff line
@@ -1048,6 +1048,9 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu, 
				 FEATURE(ID_AA64ISAR1_GPI));

		break;

	case SYS_ID_AA64DFR0_EL1:

		/* Limit debug to ARMv8.0 */

		val &= ~FEATURE(ID_AA64DFR0_DEBUGVER);

		val |= FIELD_PREP(FEATURE(ID_AA64DFR0_DEBUGVER), 6);

		/* Limit guests to PMUv3 for ARMv8.1 */

		val = cpuid_feature_cap_perfmon_field(val,

						      ID_AA64DFR0_PMUVER_SHIFT,