From 9af88f0e8b1ce5f10786654c3f00adde1c67a2e5 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Fri, 24 Aug 2012 15:54:58 -0300 Subject: [PATCH] KVM: perform an invalid memslot step for gpa base change commit 12d6e7538e2d418c08f082b1b44ffa5fb7270ed8 upstream. PPC must flush all translations before the new memory slot is visible. Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity Cc: Luis Henriques Signed-off-by: Greg Kroah-Hartman --- virt/kvm/kvm_main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index bdfbc1b..f542d79 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -774,7 +774,7 @@ int __kvm_set_memory_region(struct kvm *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 *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) -- 2.7.4