[Xen-devel] [PATCH] xen: disable reporting hw virtualized lapic availability on PVH guests

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

Even if the hardware reports support for virtualized lapic, it should
not be exposed to PVH guests, since they don't have a lapic at all.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index d45fb7f..ecc010e 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1660,7 +1660,7 @@ void vmx_hypervisor_cpuid_leaf(uint32_t sub_idx,
                                uint32_t *eax, uint32_t *ebx,
                                uint32_t *ecx, uint32_t *edx)
 {
-    if ( sub_idx != 0 )
+    if ( sub_idx != 0 || is_pvh_vcpu(current) )
         return;
     if ( cpu_has_vmx_apic_reg_virt )
         *eax |= XEN_HVM_CPUID_APIC_ACCESS_VIRT;
-- 
1.7.7.5 (Apple Git-26)


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