| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.4 55/60] KVM: perform an invalid memslot step for gpa base change | Date | Mon, 2 Dec 2013 11:06:36 -0800 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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From: Marcelo Tosatti <mtosatti@redhat.com>
commit 12d6e7538e2d418c08f082b1b44ffa5fb7270ed8 upstream.
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> Cc: Luis Henriques <luis.henriques@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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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