[PATCH 1/2] kvm: fix dirty bit tracking for slots with large pages

[Izik Eidus <ieidus@redhat.com>]

When slot is already allocted and being asked to be tracked we need to break the
large pages.

This code flush the mmu when someone ask a slot to start dirty bit tracking.

Signed-off-by: Izik Eidus <ieidus@redhat.com>
---
 virt/kvm/kvm_main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 669eb4a..3046e9c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1194,6 +1194,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
 		if (!new.dirty_bitmap)
 			goto out_free;
 		memset(new.dirty_bitmap, 0, dirty_bytes);
+		if (old.npages)
+			kvm_arch_flush_shadow(kvm);
 	}
 #endif /* not defined CONFIG_S390 */
 
-- 
1.5.6.5