[Xen-devel] [PATCH v1] x86/hvm: Add check for cpu_has_vmx_virt_exceptions

[Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>]

This is useful so HVMOP_altp2m_vcpu_enable_notify will fail and not
silently succeed. It save a call to HVMOP_altp2m_set_suppress_ve.

Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 9a490ef68c..51fc3ec07f 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -4561,6 +4561,12 @@ static int do_altp2m_op(
             break;
         }
 
+        if ( !cpu_has_vmx_virt_exceptions )
+        {
+            rc = -EOPNOTSUPP;
+            break;
+        }
+
         v = d->vcpu[a.u.enable_notify.vcpu_id];
 
         if ( !gfn_eq(vcpu_altp2m(v).veinfo_gfn, INVALID_GFN) ||
-- 
2.17.1


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