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| author | Weidong Han <weidong.han@intel.com> | 2008-09-25 23:32:02 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-10-15 14:25:29 +0200 |
| commit | e5fcfc821a467bd0827635db8fd39ab1213987e5 (patch) | |
| tree | c0b4247f84dc8382bd1e5312aa49430499b16615 /arch/x86/kvm | |
| parent | e48258009d941891fca35348986b8d280caf31cd (diff) | |
| download | linux-e5fcfc821a467bd0827635db8fd39ab1213987e5.tar.bz2 | |
KVM: Device Assignment: Map mmio pages into VT-d page table
Assigned device could DMA to mmio pages, so also need to map mmio pages
into VT-d page table.
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vtd.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/arch/x86/kvm/vtd.c b/arch/x86/kvm/vtd.c index 667bf3fb64bf..a770874f3a3a 100644 --- a/arch/x86/kvm/vtd.c +++ b/arch/x86/kvm/vtd.c @@ -36,37 +36,30 @@ int kvm_iommu_map_pages(struct kvm *kvm, { gfn_t gfn = base_gfn; pfn_t pfn; - int i, r; + int i, r = 0; struct dmar_domain *domain = kvm->arch.intel_iommu_domain; /* check if iommu exists and in use */ if (!domain) return 0; - r = -EINVAL; for (i = 0; i < npages; i++) { /* check if already mapped */ pfn = (pfn_t)intel_iommu_iova_to_pfn(domain, gfn_to_gpa(gfn)); - if (pfn && !is_mmio_pfn(pfn)) + if (pfn) continue; pfn = gfn_to_pfn(kvm, gfn); - if (!is_mmio_pfn(pfn)) { - r = intel_iommu_page_mapping(domain, - gfn_to_gpa(gfn), - pfn_to_hpa(pfn), - PAGE_SIZE, - DMA_PTE_READ | - DMA_PTE_WRITE); - if (r) { - printk(KERN_DEBUG "kvm_iommu_map_pages:" - "iommu failed to map pfn=%lx\n", pfn); - goto unmap_pages; - } - } else { - printk(KERN_DEBUG "kvm_iommu_map_page:" - "invalid pfn=%lx\n", pfn); + r = intel_iommu_page_mapping(domain, + gfn_to_gpa(gfn), + pfn_to_hpa(pfn), + PAGE_SIZE, + DMA_PTE_READ | + DMA_PTE_WRITE); + if (r) { + printk(KERN_ERR "kvm_iommu_map_pages:" + "iommu failed to map pfn=%lx\n", pfn); goto unmap_pages; } gfn++; |