diff mbox series

selftests: kvm: fix state save/load on processors without XSAVE

Message ID 1566315384-34848-1-git-send-email-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series selftests: kvm: fix state save/load on processors without XSAVE | expand

Commit Message

Paolo Bonzini Aug. 20, 2019, 3:36 p.m. UTC 
state_test and smm_test are failing on older processors that do not
have xcr0.  This is because on those processor KVM does provide
support for KVM_GET/SET_XSAVE (to avoid having to rely on the older
KVM_GET/SET_FPU) but not for KVM_GET/SET_XCRS.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tools/testing/selftests/kvm/lib/x86_64/processor.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

Comments

Jim Mattson Aug. 21, 2019, 7:50 p.m. UTC | #1 
On Tue, Aug 20, 2019 at 8:36 AM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> state_test and smm_test are failing on older processors that do not
> have xcr0.  This is because on those processor KVM does provide
> support for KVM_GET/SET_XSAVE (to avoid having to rely on the older
> KVM_GET/SET_FPU) but not for KVM_GET/SET_XCRS.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 6cb34a0fa200..0a5e487dbc50 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1060,9 +1060,11 @@  struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid)
         TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_XSAVE, r: %i",
                 r);
 
-	r = ioctl(vcpu->fd, KVM_GET_XCRS, &state->xcrs);
-        TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_XCRS, r: %i",
-                r);
+	if (kvm_check_cap(KVM_CAP_XCRS)) {
+		r = ioctl(vcpu->fd, KVM_GET_XCRS, &state->xcrs);
+		TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_XCRS, r: %i",
+			    r);
+	}
 
 	r = ioctl(vcpu->fd, KVM_GET_SREGS, &state->sregs);
         TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_SREGS, r: %i",
@@ -1103,9 +1105,11 @@  void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_x86_state *s
         TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XSAVE, r: %i",
                 r);
 
-	r = ioctl(vcpu->fd, KVM_SET_XCRS, &state->xcrs);
-        TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XCRS, r: %i",
-                r);
+	if (kvm_check_cap(KVM_CAP_XCRS)) {
+		r = ioctl(vcpu->fd, KVM_SET_XCRS, &state->xcrs);
+		TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XCRS, r: %i",
+			    r);
+	}
 
 	r = ioctl(vcpu->fd, KVM_SET_SREGS, &state->sregs);
         TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_SREGS, r: %i",