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-rw-r--r--arch/x86/kvm/mmu.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index cb391d629af..99c239c5c0a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -70,6 +70,9 @@ static int dbg = 0;
module_param(dbg, bool, 0644);
#endif
+static int oos_shadow = 1;
+module_param(oos_shadow, bool, 0644);
+
#ifndef MMU_DEBUG
#define ASSERT(x) do { } while (0)
#else
@@ -1424,7 +1427,7 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn,
return 1;
if (shadow->unsync)
return 0;
- if (can_unsync)
+ if (can_unsync && oos_shadow)
return kvm_unsync_page(vcpu, shadow);
return 1;
}