Commit 12d6e753 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Avi Kivity
Browse files

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: default avatarMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 2df72e9b

virt/kvm/kvm_main.c

+3 −3
Original line number Diff line number Diff line
@@ -791,7 +791,7 @@ 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;
@@ -807,8 +807,8 @@ 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)