KVM: MMU: add "oos_shadow" parameter to disable oos
Subject says it all.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index cb391d6..99c239c 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -70,6 +70,9 @@
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 @@
return 1;
if (shadow->unsync)
return 0;
- if (can_unsync)
+ if (can_unsync && oos_shadow)
return kvm_unsync_page(vcpu, shadow);
return 1;
}