# Commit fd1864f48d8914fb8eeb6841cd08c2c09b368909
# Date 2014-02-24 12:09:52 +0100
# Author Yang Zhang <yang.z.zhang@Intel.com>
# Committer Jan Beulich <jbeulich@suse.com>
Nested VMX: update nested paging mode on vmexit

Since SVM and VMX use different mechanism to emulate the virtual-vmentry
and virtual-vmexit, it's hard to update the nested paging mode correctly in
common code. So we need to update the nested paging mode in their respective
code path.
SVM already updates the nested paging mode on vmexit. This patch adds the same
logic in VMX side.

Previous discussion is here:
http://lists.xen.org/archives/html/xen-devel/2013-12/msg01759.html

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Christoph Egger <chegger@amazon.de>

--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2541,6 +2541,7 @@ void vmx_vmexit_handler(struct cpu_user_
     vcpu_nestedhvm(v).nv_vmswitch_in_progress = 0;
     if ( nestedhvm_vcpu_in_guestmode(v) )
     {
+        paging_update_nestedmode(v);
         if ( nvmx_n2_vmexit_handler(regs, exit_reason) )
             goto out;
     }