diff options
| author | David Gibson <david@gibson.dropbear.id.au> | 2015-09-30 12:13:54 +1000 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2015-10-05 12:38:41 -0600 |
| commit | 7a140a57c69293a2f19b045f40953a87879e8c76 (patch) | |
| tree | 0e417501391643f168c97b4b70f5d63c717073f4 /hw | |
| parent | 3898aad323475cf19127d9fc0846954d591d8e11 (diff) | |
| download | qemu-7a140a57c69293a2f19b045f40953a87879e8c76.tar.gz | |
vfio: Record host IOMMU's available IO page sizes
Depending on the host IOMMU type we determine and record the available page
sizes for IOMMU translation. We'll need this for other validation in
future patches.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/vfio/common.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 2faf49206b..f666de2c96 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -677,6 +677,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) { bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU); + struct vfio_iommu_type1_info info; ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); if (ret) { @@ -702,6 +703,15 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) */ container->min_iova = 0; container->max_iova = (hwaddr)-1; + + /* Assume just 4K IOVA page size */ + container->iova_pgsizes = 0x1000; + info.argsz = sizeof(info); + ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info); + /* Ignore errors */ + if ((ret == 0) && (info.flags & VFIO_IOMMU_INFO_PGSIZES)) { + container->iova_pgsizes = info.iova_pgsizes; + } } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) { struct vfio_iommu_spapr_tce_info info; @@ -744,6 +754,9 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) } container->min_iova = info.dma32_window_start; container->max_iova = container->min_iova + info.dma32_window_size - 1; + + /* Assume just 4K IOVA pages for now */ + container->iova_pgsizes = 0x1000; } else { error_report("vfio: No available IOMMU models"); ret = -EINVAL; |