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charset="utf-8" Added helper functions to get IOMMU info capability chain. Added function to get migration capability flags from that capability chain for IOMMU container. Similar change was proposed earlier: https://lists.gnu.org/archive/html/qemu-devel/2018-05/msg03759.html Signed-off-by: Kirti Wankhede Cc: Shameer Kolothum Cc: Eric Auger --- hw/vfio/common.c | 85 +++++++++++++++++++++++++++++++++++++++= ---- include/hw/vfio/vfio-common.h | 1 + 2 files changed, 78 insertions(+), 8 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 4bf864695a8e..4277b275ca21 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1398,6 +1398,69 @@ static int vfio_init_container(VFIOContainer *contai= ner, int group_fd, return 0; } =20 +static int vfio_get_iommu_info(VFIOContainer *container, + struct vfio_iommu_type1_info **info) +{ + + size_t argsz =3D sizeof(struct vfio_iommu_type1_info); + + *info =3D g_new0(struct vfio_iommu_type1_info, 1); +again: + (*info)->argsz =3D argsz; + + if (ioctl(container->fd, VFIO_IOMMU_GET_INFO, *info)) { + g_free(*info); + *info =3D NULL; + return -errno; + } + + if (((*info)->argsz > argsz)) { + argsz =3D (*info)->argsz; + *info =3D g_realloc(*info, argsz); + goto again; + } + + return 0; +} + +static struct vfio_info_cap_header * +vfio_get_iommu_info_cap(struct vfio_iommu_type1_info *info, uint16_t id) +{ + struct vfio_info_cap_header *hdr; + void *ptr =3D info; + + if (!(info->flags & VFIO_IOMMU_INFO_CAPS)) { + return NULL; + } + + for (hdr =3D ptr + info->cap_offset; hdr !=3D ptr; hdr =3D ptr + hdr->= next) { + if (hdr->id =3D=3D id) { + return hdr; + } + } + + return NULL; +} + +static void vfio_get_iommu_info_migration(VFIOContainer *container, + struct vfio_iommu_type1_info *inf= o) +{ + struct vfio_info_cap_header *hdr; + struct vfio_iommu_type1_info_cap_migration *cap_mig; + + hdr =3D vfio_get_iommu_info_cap(info, VFIO_IOMMU_TYPE1_INFO_CAP_MIGRAT= ION); + if (!hdr) { + return; + } + + cap_mig =3D container_of(hdr, struct vfio_iommu_type1_info_cap_migrati= on, + header); + + if (cap_mig->flags & VFIO_IOMMU_INFO_CAPS_MIGRATION_DIRTY_PAGE_TRACK) { + container->dirty_pages_supported =3D true; + } +} + static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, Error **errp) { @@ -1462,6 +1525,7 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, container->space =3D space; container->fd =3D fd; container->error =3D NULL; + container->dirty_pages_supported =3D false; QLIST_INIT(&container->giommu_list); QLIST_INIT(&container->hostwin_list); =20 @@ -1474,7 +1538,7 @@ static int vfio_connect_container(VFIOGroup *group, A= ddressSpace *as, case VFIO_TYPE1v2_IOMMU: case VFIO_TYPE1_IOMMU: { - struct vfio_iommu_type1_info info; + struct vfio_iommu_type1_info *info; =20 /* * FIXME: This assumes that a Type1 IOMMU can map any 64-bit @@ -1483,15 +1547,20 @@ static int vfio_connect_container(VFIOGroup *group,= AddressSpace *as, * existing Type1 IOMMUs generally support any IOVA we're * going to actually try in practice. */ - info.argsz =3D sizeof(info); - ret =3D ioctl(fd, VFIO_IOMMU_GET_INFO, &info); - /* Ignore errors */ - if (ret || !(info.flags & VFIO_IOMMU_INFO_PGSIZES)) { + ret =3D vfio_get_iommu_info(container, &info); + if (ret) { + goto free_container_exit; + } + + if (!(info->flags & VFIO_IOMMU_INFO_PGSIZES)) { /* Assume 4k IOVA page size */ - info.iova_pgsizes =3D 4096; + info->iova_pgsizes =3D 4096; } - vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes); - container->pgsizes =3D info.iova_pgsizes; + vfio_host_win_add(container, 0, (hwaddr)-1, info->iova_pgsizes); + container->pgsizes =3D info->iova_pgsizes; + + vfio_get_iommu_info_migration(container, info); + g_free(info); break; } case VFIO_SPAPR_TCE_v2_IOMMU: diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index c78033e4149d..8ab741463d50 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -79,6 +79,7 @@ typedef struct VFIOContainer { unsigned iommu_type; Error *error; bool initialized; + bool dirty_pages_supported; unsigned long pgsizes; QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; --=20 2.7.0