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vfio/iommufd: Implement VFIOIOMMUClass::set_dirty_tracking support

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ioctl(iommufd, IOMMU_HWPT_SET_DIRTY_TRACKING, arg) is the UAPI that
enables or disables dirty page tracking. The ioctl is used if the hwpt
has been created with dirty tracking supported domain (stored in
hwpt::flags) and it is called on the whole list of iommu domains.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Joao Martins 2024-07-22 22:13:23 +01:00 committed by Cédric Le Goater
parent dddfd8d667
commit 52ce88229c
4 changed files with 58 additions and 0 deletions
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23
backends/iommufd.c
View File

@ -238,6 +238,29 @@ bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
return true;
}
bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be,
uint32_t hwpt_id, bool start,
Error **errp)
{
int ret;
struct iommu_hwpt_set_dirty_tracking set_dirty = {
.size = sizeof(set_dirty),
.hwpt_id = hwpt_id,
.flags = start ? IOMMU_HWPT_DIRTY_TRACKING_ENABLE : 0,
};
ret = ioctl(be->fd, IOMMU_HWPT_SET_DIRTY_TRACKING, &set_dirty);
trace_iommufd_backend_set_dirty(be->fd, hwpt_id, start, ret ? errno : 0);
if (ret) {
error_setg_errno(errp, errno,
"IOMMU_HWPT_SET_DIRTY_TRACKING(hwpt_id %u) failed",
hwpt_id);
return false;
}
return true;
}
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
uint64_t *caps, Error **errp)

1
backends/trace-events
View File

@ -16,3 +16,4 @@ iommufd_backend_unmap_dma(int iommufd, uint32_t ioas, uint64_t iova, uint64_t si
iommufd_backend_alloc_ioas(int iommufd, uint32_t ioas) " iommufd=%d ioas=%d"
iommufd_backend_alloc_hwpt(int iommufd, uint32_t dev_id, uint32_t pt_id, uint32_t flags, uint32_t hwpt_type, uint32_t len, uint64_t data_ptr, uint32_t out_hwpt_id, int ret) " iommufd=%d dev_id=%u pt_id=%u flags=0x%x hwpt_type=%u len=%u data_ptr=0x%"PRIx64" out_hwpt=%u (%d)"
iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=%d id=%d (%d)"
iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int ret) " iommufd=%d hwpt=%u enable=%d (%d)"

32
hw/vfio/iommufd.c
View File

@ -115,6 +115,37 @@ static bool iommufd_hwpt_dirty_tracking(VFIOIOASHwpt *hwpt)
return hwpt && hwpt->hwpt_flags & IOMMU_HWPT_ALLOC_DIRTY_TRACKING;
}
static int iommufd_set_dirty_page_tracking(const VFIOContainerBase *bcontainer,
bool start, Error **errp)
{
const VFIOIOMMUFDContainer *container =
container_of(bcontainer, VFIOIOMMUFDContainer, bcontainer);
VFIOIOASHwpt *hwpt;
QLIST_FOREACH(hwpt, &container->hwpt_list, next) {
if (!iommufd_hwpt_dirty_tracking(hwpt)) {
continue;
}
if (!iommufd_backend_set_dirty_tracking(container->be,
hwpt->hwpt_id, start, errp)) {
goto err;
}
}
return 0;
err:
QLIST_FOREACH(hwpt, &container->hwpt_list, next) {
if (!iommufd_hwpt_dirty_tracking(hwpt)) {
continue;
}
iommufd_backend_set_dirty_tracking(container->be,
hwpt->hwpt_id, !start, NULL);
}
return -EINVAL;
}
static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp)
{
ERRP_GUARD();
@ -739,6 +770,7 @@ static void vfio_iommu_iommufd_class_init(ObjectClass *klass, void *data)
vioc->attach_device = iommufd_cdev_attach;
vioc->detach_device = iommufd_cdev_detach;
vioc->pci_hot_reset = iommufd_cdev_pci_hot_reset;
vioc->set_dirty_page_tracking = iommufd_set_dirty_page_tracking;
};
static bool hiod_iommufd_vfio_realize(HostIOMMUDevice *hiod, void *opaque,

2
include/sysemu/iommufd.h
View File

@ -55,6 +55,8 @@ bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
uint32_t data_type, uint32_t data_len,
void *data_ptr, uint32_t *out_hwpt,
Error **errp);
bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
bool start, Error **errp);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
#endif