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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>
This commit is contained in:
David Gibson 2015-09-30 12:13:54 +10:00 committed by Alex Williamson
parent 3898aad323
commit 7a140a57c6
2 changed files with 14 additions and 0 deletions
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13
hw/vfio/common.c
View File

@ -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;

1
include/hw/vfio/vfio-common.h
View File

@ -71,6 +71,7 @@ typedef struct VFIOContainer {
* future
*/
hwaddr min_iova, max_iova;
uint64_t iova_pgsizes;
QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
QLIST_HEAD(, VFIOGroup) group_list;
QLIST_ENTRY(VFIOContainer) next;