KVM: arm64: Add a capability to advertise SVE support

To provide a uniform way to check for KVM SVE support amongst other features, this patch adds a suitable capability KVM_CAP_ARM_SVE, and reports it as present when SVE is available. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Julien Thierry <julien.thierry@arm.com> Tested-by: zhang.lei <zhang.lei@jp.fujitsu.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
mariux64 · Mar 29, 2019 · 555f3d0 · 555f3d0
1 parent 9a3cdf2
commit 555f3d0
Show file tree

Hide file tree

Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
@@ -98,6 +98,9 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_ARM_VM_IPA_SIZE:
 		r = kvm_ipa_limit;
 		break;
+	case KVM_CAP_ARM_SVE:
+		r = system_supports_sve();
+		break;
 	default:
 		r = 0;
 	}

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
@@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_ARM_VM_IPA_SIZE 165
 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166
 #define KVM_CAP_HYPERV_CPUID 167
+#define KVM_CAP_ARM_SVE 168
 
 #ifdef KVM_CAP_IRQ_ROUTING