Accepting zero here even when !cpu_has_mpx makes the restore side
symmetric to the save logic (which avoids saving the value if zero),
i.e. makes either side independent of the logic on the other side.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -824,7 +824,7 @@ static int vmx_load_msr(struct vcpu *v,
case MSR_IA32_BNDCFGS:
if ( cpu_has_mpx )
__vmwrite(GUEST_BNDCFGS, ctxt->msr[i].val);
- else
+ else if ( ctxt->msr[i].val )
err = -ENXIO;
break;
case MSR_IA32_XSS:
VMX: relax incoming BNDCFGS check
Accepting zero here even when !cpu_has_mpx makes the restore side
symmetric to the save logic (which avoids saving the value if zero),
i.e. makes either side independent of the logic on the other side.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -824,7 +824,7 @@ static int vmx_load_msr(struct vcpu *v,
case MSR_IA32_BNDCFGS:
if ( cpu_has_mpx )
__vmwrite(GUEST_BNDCFGS, ctxt->msr[i].val);
- else
+ else if ( ctxt->msr[i].val )
err = -ENXIO;
break;
case MSR_IA32_XSS:
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