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KVM: perform an invalid memslot step for gpa base change 

PPC must flush all translations before the new memory slot
is visible.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Marcelo Tosatti 2012-08-24 15:54:58 -03:00 committed by Avi Kivity
parent 2df72e9bc4
commit 12d6e7538e
1 changed files with 3 additions and 3 deletions
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6
virt/kvm/kvm_main.c
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@ -791,7 +791,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
/* destroy any largepage mappings for dirty tracking */ /* destroy any largepage mappings for dirty tracking */
} }
if (!npages) { if (!npages || base_gfn != old.base_gfn) {
struct kvm_memory_slot *slot; struct kvm_memory_slot *slot;
r = -ENOMEM; r = -ENOMEM;
@ -807,8 +807,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
old_memslots = kvm->memslots; old_memslots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots); rcu_assign_pointer(kvm->memslots, slots);
synchronize_srcu_expedited(&kvm->srcu); synchronize_srcu_expedited(&kvm->srcu);
/* From this point no new shadow pages pointing to a deleted /* From this point no new shadow pages pointing to a deleted,
* memslot will be created. * or moved, memslot will be created.
* *
* validation of sp->gfn happens in: * validation of sp->gfn happens in:
* - gfn_to_hva (kvm_read_guest, gfn_to_pfn) * - gfn_to_hva (kvm_read_guest, gfn_to_pfn)