Commit 7a140a57 authored by David Gibson's avatar David Gibson Committed by Alex Williamson
Browse files

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: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: default avatarThomas Huth <thuth@redhat.com>
Reviewed-by: default avatarLaurent Vivier <lvivier@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 3898aad3

hw/vfio/common.c

+13 −0
Original line number Diff line number Diff line
@@ -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;

include/hw/vfio/vfio-common.h

+1 −0
Original line number Diff line number Diff line
@@ -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;