On Mon, Nov 04, 2013 at 09:08:12AM -0700, Greg Edwards wrote: > When determining the page size we could use to map with the IOMMU, the > page size should also be aligned with the hva, not just the gfn. The > gfn may not reflect the real alignment within the hugetlbfs file. > > Signed-off-by: Greg Edwards <gedwards@xxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > --- > virt/kvm/iommu.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c > index 72a130b..c329c8f 100644 > --- a/virt/kvm/iommu.c > +++ b/virt/kvm/iommu.c > @@ -103,6 +103,10 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) > while ((gfn << PAGE_SHIFT) & (page_size - 1)) > page_size >>= 1; > > + /* Make sure hva is aligned to the page size we want to map */ > + while (__gfn_to_hva_memslot(slot, gfn) & (page_size - 1)) > + page_size >>= 1; > + > /* > * Pin all pages we are about to map in memory. This is > * important because we unmap and unpin in 4kb steps later. > -- > 1.8.3.2 Reviewed-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
