Add a function to handle ioctl VFIO_DEVICE_GET_DEV_PROPERTY
to retrieve properties from a VFIO device.
Signed-off-by: Baptiste Reynal <b.rey...@virtualopensystems.com>
---
v1 -> v2:
fix property->length initialization
---
hw/vfio/common.c | 32 ++++++++++++++++++++++++++++++++
include/hw/vfio/vfio-common.h | 2 ++
2 files changed, 34 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index cf483ff..728afee 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -957,3 +957,35 @@ int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
return vfio_container_do_ioctl(as, groupid, req, param);
}
+
+struct vfio_dev_property *vfio_get_dev_property(int device, const char *name,
+ unsigned int type)
+{
+ unsigned int length, argsz;
+ struct vfio_dev_property *property = NULL;
+ int ret;
+
+ length = strlen(name) + 1;
+ argsz = sizeof(struct vfio_dev_property) + length;
+ property = malloc(argsz);
+ property->argsz = argsz;
+ property->type = type;
+ property->length = length;
+
+ do {
+ length = property->length;
+ argsz = sizeof(struct vfio_dev_property) + length;
+ property = realloc(property, argsz);
+ property->argsz = argsz;
+ strcpy((char *) property->data, name);
+
+ ret = ioctl(device, VFIO_DEVICE_GET_DEV_PROPERTY, property);
+ } while (length < property->length);
+
+ if (ret) {
+ g_free(property);
+ property = NULL;
+ }
+
+ return property;
+}
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 8ab880a..66e9c5a 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -144,6 +144,8 @@ VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
void vfio_put_group(VFIOGroup *group);
int vfio_get_device(VFIOGroup *group, const char *name,
VFIODevice *vbasedev);
+struct vfio_dev_property *vfio_get_dev_property(int device, const char *name,
+ unsigned int type);
extern const MemoryRegionOps vfio_region_ops;
extern const MemoryListener vfio_memory_listener;
--
2.3.0
