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Message-ID: <20131104160812.GA6026@psuche> Date: Mon, 4 Nov 2013 09:08:12 -0700 From: Greg Edwards <gedwards@....com> To: kvm@...r.kernel.org CC: "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Marcelo Tosatti <mtosatti@...hat.com> Subject: [PATCH v2] KVM: IOMMU: hva align mapping page size 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@....com> Cc: stable@...r.kernel.org --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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