3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
commit 12d6e7538e2d418c08f082b1b44ffa5fb7270ed8 upstream.
PPC must flush all translations before the new memory slot
is visible.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
Cc: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -774,7 +774,7 @@ int __kvm_set_memory_region(struct kvm *
/* destroy any largepage mappings for dirty tracking */
}
- if (!npages) {
+ if (!npages || base_gfn != old.base_gfn) {
struct kvm_memory_slot *slot;
r = -ENOMEM;
@@ -790,8 +790,8 @@ int __kvm_set_memory_region(struct kvm *
old_memslots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots);
synchronize_srcu_expedited(&kvm->srcu);
- /* From this point no new shadow pages pointing to a deleted
- * memslot will be created.
+ /* From this point no new shadow pages pointing to a deleted,
+ * or moved, memslot will be created.
*
* validation of sp->gfn happens in:
* - gfn_to_hva (kvm_read_guest, gfn_to_pfn)
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