From a2eb46491e28079debc39488a7e23ed76cb5b003 Mon Sep 17 00:00:00 2001 From: Alexandru Isaila Date: Tue, 25 Sep 2018 12:10:38 +0300 Subject: [PATCH] x86/hvm: Add check for cpu_has_vmx_virt_exceptions 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 Reviewed-by: Andrew Cooper --- 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) || -- 2.30.2