[Xen-devel] [PATCH v2 3/3] x86/hvm: check HAP before enabling nested VMX

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

The current implementation of nested VMX cannot work without HAP.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 6621d62..b8db808 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -4123,7 +4123,7 @@ static int hvmop_set_param(
          * Remove the check below once we have
          * shadow-on-shadow.
          */
-        if ( cpu_has_svm && !paging_mode_hap(d) && a.value )
+        if ( (cpu_has_svm || cpu_has_vmx) && !paging_mode_hap(d) && a.value )
             rc = -EINVAL;
         if ( a.value &&
              d->arch.hvm_domain.params[HVM_PARAM_ALTP2M] )
-- 
2.10.1


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