[Xen-devel] [PATCH v4 07/11] nested vmx: enable IA32E mode while do VM entry

[Dongxiao Xu <dongxiao.xu@xxxxxxxxx>]

Some VMMs may check the platform capability to judge whether long
mode guest is supported. Therefore we need to expose this bit to
guest VMM.

Xen on Xen works fine in current solution because Xen doesn't
check this capability but directly set it in VMCS if guest
supports long mode.

Signed-off-by: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vvmx.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 02a7052..dcdc83e 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1376,7 +1376,8 @@ int nvmx_msr_read_intercept(unsigned int msr, u64 
*msr_content)
         tmp = VMX_ENTRY_CTLS_DEFAULT1;
         data = VM_ENTRY_LOAD_GUEST_PAT |
                VM_ENTRY_LOAD_GUEST_EFER |
-               VM_ENTRY_LOAD_PERF_GLOBAL_CTRL;
+               VM_ENTRY_LOAD_PERF_GLOBAL_CTRL |
+               VM_ENTRY_IA32E_MODE;
         data = ((data | tmp) << 32) | tmp;
         break;
 
-- 
1.7.1


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