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-rw-r--r--backends/iommufd.c30
-rw-r--r--backends/trace-events1
-rw-r--r--hw/vfio/iommufd.c85
-rw-r--r--include/hw/vfio/vfio-common.h9
-rw-r--r--include/sysemu/iommufd.h5
5 files changed, 130 insertions, 0 deletions
diff --git a/backends/iommufd.c b/backends/iommufd.c
index 48dfd39624..60a3d14bfa 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -207,6 +207,36 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
return ret;
}
+bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
+ uint32_t pt_id, uint32_t flags,
+ uint32_t data_type, uint32_t data_len,
+ void *data_ptr, uint32_t *out_hwpt,
+ Error **errp)
+{
+ int ret, fd = be->fd;
+ struct iommu_hwpt_alloc alloc_hwpt = {
+ .size = sizeof(struct iommu_hwpt_alloc),
+ .flags = flags,
+ .dev_id = dev_id,
+ .pt_id = pt_id,
+ .data_type = data_type,
+ .data_len = data_len,
+ .data_uptr = (uintptr_t)data_ptr,
+ };
+
+ ret = ioctl(fd, IOMMU_HWPT_ALLOC, &alloc_hwpt);
+ trace_iommufd_backend_alloc_hwpt(fd, dev_id, pt_id, flags, data_type,
+ data_len, (uintptr_t)data_ptr,
+ alloc_hwpt.out_hwpt_id, ret);
+ if (ret) {
+ error_setg_errno(errp, errno, "Failed to allocate hwpt");
+ return false;
+ }
+
+ *out_hwpt = alloc_hwpt.out_hwpt_id;
+ 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)
diff --git a/backends/trace-events b/backends/trace-events
index 211e6f374a..4d8ac02fe7 100644
--- a/backends/trace-events
+++ b/backends/trace-events
@@ -14,4 +14,5 @@ iommufd_backend_map_dma(int iommufd, uint32_t ioas, uint64_t iova, uint64_t size
iommufd_backend_unmap_dma_non_exist(int iommufd, uint32_t ioas, uint64_t iova, uint64_t size, int ret) " Unmap nonexistent mapping: iommufd=%d ioas=%d iova=0x%"PRIx64" size=0x%"PRIx64" (%d)"
iommufd_backend_unmap_dma(int iommufd, uint32_t ioas, uint64_t iova, uint64_t size, int ret) " iommufd=%d ioas=%d iova=0x%"PRIx64" size=0x%"PRIx64" (%d)"
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)"
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 7390621ee9..58c11c9308 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -212,10 +212,89 @@ static bool iommufd_cdev_detach_ioas_hwpt(VFIODevice *vbasedev, Error **errp)
return true;
}
+static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev,
+ VFIOIOMMUFDContainer *container,
+ Error **errp)
+{
+ ERRP_GUARD();
+ IOMMUFDBackend *iommufd = vbasedev->iommufd;
+ uint32_t flags = 0;
+ VFIOIOASHwpt *hwpt;
+ uint32_t hwpt_id;
+ int ret;
+
+ /* Try to find a domain */
+ QLIST_FOREACH(hwpt, &container->hwpt_list, next) {
+ ret = iommufd_cdev_attach_ioas_hwpt(vbasedev, hwpt->hwpt_id, errp);
+ if (ret) {
+ /* -EINVAL means the domain is incompatible with the device. */
+ if (ret == -EINVAL) {
+ /*
+ * It is an expected failure and it just means we will try
+ * another domain, or create one if no existing compatible
+ * domain is found. Hence why the error is discarded below.
+ */
+ error_free(*errp);
+ *errp = NULL;
+ continue;
+ }
+
+ return false;
+ } else {
+ vbasedev->hwpt = hwpt;
+ QLIST_INSERT_HEAD(&hwpt->device_list, vbasedev, hwpt_next);
+ return true;
+ }
+ }
+
+ if (!iommufd_backend_alloc_hwpt(iommufd, vbasedev->devid,
+ container->ioas_id, flags,
+ IOMMU_HWPT_DATA_NONE, 0, NULL,
+ &hwpt_id, errp)) {
+ return false;
+ }
+
+ hwpt = g_malloc0(sizeof(*hwpt));
+ hwpt->hwpt_id = hwpt_id;
+ QLIST_INIT(&hwpt->device_list);
+
+ ret = iommufd_cdev_attach_ioas_hwpt(vbasedev, hwpt->hwpt_id, errp);
+ if (ret) {
+ iommufd_backend_free_id(container->be, hwpt->hwpt_id);
+ g_free(hwpt);
+ return false;
+ }
+
+ vbasedev->hwpt = hwpt;
+ QLIST_INSERT_HEAD(&hwpt->device_list, vbasedev, hwpt_next);
+ QLIST_INSERT_HEAD(&container->hwpt_list, hwpt, next);
+ return true;
+}
+
+static void iommufd_cdev_autodomains_put(VFIODevice *vbasedev,
+ VFIOIOMMUFDContainer *container)
+{
+ VFIOIOASHwpt *hwpt = vbasedev->hwpt;
+
+ QLIST_REMOVE(vbasedev, hwpt_next);
+ vbasedev->hwpt = NULL;
+
+ if (QLIST_EMPTY(&hwpt->device_list)) {
+ QLIST_REMOVE(hwpt, next);
+ iommufd_backend_free_id(container->be, hwpt->hwpt_id);
+ g_free(hwpt);
+ }
+}
+
static bool iommufd_cdev_attach_container(VFIODevice *vbasedev,
VFIOIOMMUFDContainer *container,
Error **errp)
{
+ /* mdevs aren't physical devices and will fail with auto domains */
+ if (!vbasedev->mdev) {
+ return iommufd_cdev_autodomains_get(vbasedev, container, errp);
+ }
+
return !iommufd_cdev_attach_ioas_hwpt(vbasedev, container->ioas_id, errp);
}
@@ -227,6 +306,11 @@ static void iommufd_cdev_detach_container(VFIODevice *vbasedev,
if (!iommufd_cdev_detach_ioas_hwpt(vbasedev, &err)) {
error_report_err(err);
}
+
+ if (vbasedev->hwpt) {
+ iommufd_cdev_autodomains_put(vbasedev, container);
+ }
+
}
static void iommufd_cdev_container_destroy(VFIOIOMMUFDContainer *container)
@@ -354,6 +438,7 @@ static bool iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
container = VFIO_IOMMU_IOMMUFD(object_new(TYPE_VFIO_IOMMU_IOMMUFD));
container->be = vbasedev->iommufd;
container->ioas_id = ioas_id;
+ QLIST_INIT(&container->hwpt_list);
bcontainer = &container->bcontainer;
vfio_address_space_insert(space, bcontainer);
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 98acae8c1c..1a96678f8c 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -95,10 +95,17 @@ typedef struct VFIOHostDMAWindow {
typedef struct IOMMUFDBackend IOMMUFDBackend;
+typedef struct VFIOIOASHwpt {
+ uint32_t hwpt_id;
+ QLIST_HEAD(, VFIODevice) device_list;
+ QLIST_ENTRY(VFIOIOASHwpt) next;
+} VFIOIOASHwpt;
+
typedef struct VFIOIOMMUFDContainer {
VFIOContainerBase bcontainer;
IOMMUFDBackend *be;
uint32_t ioas_id;
+ QLIST_HEAD(, VFIOIOASHwpt) hwpt_list;
} VFIOIOMMUFDContainer;
OBJECT_DECLARE_SIMPLE_TYPE(VFIOIOMMUFDContainer, VFIO_IOMMU_IOMMUFD);
@@ -135,6 +142,8 @@ typedef struct VFIODevice {
HostIOMMUDevice *hiod;
int devid;
IOMMUFDBackend *iommufd;
+ VFIOIOASHwpt *hwpt;
+ QLIST_ENTRY(VFIODevice) hwpt_next;
} VFIODevice;
struct VFIODeviceOps {
diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h
index 57d502a1c7..e917e7591d 100644
--- a/include/sysemu/iommufd.h
+++ b/include/sysemu/iommufd.h
@@ -50,6 +50,11 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
uint64_t *caps, Error **errp);
+bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
+ uint32_t pt_id, uint32_t flags,
+ uint32_t data_type, uint32_t data_len,
+ void *data_ptr, uint32_t *out_hwpt,
+ Error **errp);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
#endif
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-19 23:51:40 +0000