[Xen-devel] [PATCH] vvmx: fix the wrong address width in c/s 08fac63

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

c/s 08fac63 misused v->domain-arch.paging.gfn_bits as the width of
guest physical address and missed adding PAGE_SHIFT to it when
checking vmxon operand.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vvmx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 4a5b79c..9e37d22 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1388,7 +1388,8 @@ int nvmx_handle_vmxon(struct cpu_user_regs *regs)
         return X86EMUL_OKAY;
     }
 
-    if ( (gpa & ~PAGE_MASK) || (gpa >> v->domain->arch.paging.gfn_bits) )
+    if ( (gpa & ~PAGE_MASK) ||
+         (gpa >> (v->domain->arch.paging.gfn_bits + PAGE_SHIFT)) )
     {
         vmreturn(regs, VMFAIL_INVALID);
         return X86EMUL_OKAY;
-- 
2.10.1


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