[Xen-devel] [PATCH 07/11] nEPT: Sync PDPTR fields if L2 guest in PAE paging mode

[xiantao.zhang@xxxxxxxxx]

From: Zhang Xiantao <xiantao.zhang@xxxxxxxxx>

For PAE L2 guest, GUEST_DPPTR registers needs to be synced for each virtual
vmentry.
Signed-off-by: Zhang Xiantao <xiantao.zhang@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vvmx.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index ab68b52..3fc128b 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -824,9 +824,15 @@ static void load_shadow_guest_state(struct vcpu *v)
     vvmcs_to_shadow(vvmcs, CR0_READ_SHADOW);
     vvmcs_to_shadow(vvmcs, CR4_READ_SHADOW);
     vvmcs_to_shadow(vvmcs, CR0_GUEST_HOST_MASK);
-    vvmcs_to_shadow(vvmcs, CR4_GUEST_HOST_MASK);
 
-    /* TODO: PDPTRs for nested ept */
+    if ( nvmx_ept_enabled(v) && hvm_pae_enabled(v) &&
+                    (v->arch.hvm_vcpu.guest_efer & EFER_LMA) ) {
+           vvmcs_to_shadow(vvmcs, GUEST_PDPTR0);
+           vvmcs_to_shadow(vvmcs, GUEST_PDPTR1);
+           vvmcs_to_shadow(vvmcs, GUEST_PDPTR2);
+           vvmcs_to_shadow(vvmcs, GUEST_PDPTR3);
+    }
+
     /* TODO: CR3 target control */
 }
 
-- 
1.7.1


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