Commit b8b1d62f authored by Oliver Upton's avatar Oliver Upton Committed by Marc Zyngier
Browse files

KVM: arm64: nv: Expose up to FEAT_Debugv8p8 to NV-enabled VMs 



The changes to the debug architecture up to v8.8 are concerned with
external debug, which of course has no direct impact on VMs. Raise the
feature limit and document what's preventing us from raising it further.

Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 6f2224ef

arch/arm64/kvm/nested.c

+5 −2
Original line number Diff line number Diff line
@@ -1581,8 +1581,11 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val) 
			 ID_AA64DFR0_EL1_PMSS		|

			 ID_AA64DFR0_EL1_TraceVer);



		/* Cap Debug to ARMv8.1 */

		val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, VHE);

		/*

		 * FEAT_Debugv8p9 requires support for extended breakpoints /

		 * watchpoints.

		 */

		val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, V8P8);

		break;

	}