[Xen-devel] [PATCH] nested EPT: fix the handling of nested EPT.

[Liang Li <liang.z.li@xxxxxxxxx>]

If the host EPT entry is changed, the nested EPT should be updated.
The current code does not do this, and it's wrong.

Reported-by: Tim Deegan <tim@xxxxxxx>
Signed-off-by: Liang Li <liang.z.li@xxxxxxxxx>
Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
---
 xen/arch/x86/mm/p2m-ept.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index 5133eb6..a8ee949 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -26,6 +26,7 @@
 #include <asm/p2m.h>
 #include <asm/hvm/vmx/vmx.h>
 #include <asm/hvm/vmx/vmcs.h>
+#include <asm/hvm/nestedhvm.h>
 #include <xen/iommu.h>
 #include <asm/mtrr.h>
 #include <asm/hvm/cacheattr.h>
@@ -1074,6 +1075,9 @@ void ept_sync_domain(struct p2m_domain *p2m)
     if ( !paging_mode_hap(d) || !d->vcpu || !d->vcpu[0] )
         return;
 
+    if ( nestedhvm_enabled(d) )
+        p2m_flush_nestedp2m(d);
+
     ASSERT(local_irq_is_enabled());
 
     /*
-- 
1.9.1


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