Introduce a helper function iommufd_backend_get_device_info() to get
host IOMMU related information through iommufd uAPI.
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
include/sysemu/iommufd.h | 4 ++++
backends/iommufd.c | 23 ++++++++++++++++++++++-
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h
index 71c53cbb45..fa1a866237 100644
--- a/include/sysemu/iommufd.h
+++ b/include/sysemu/iommufd.h
@@ -4,6 +4,7 @@
#include "qom/object.h"
#include "exec/hwaddr.h"
#include "exec/cpu-common.h"
+#include <linux/iommufd.h>
#include "sysemu/host_iommu_device.h"
#define TYPE_IOMMUFD_BACKEND "iommufd"
@@ -34,6 +35,9 @@ int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t
ioas_id, hwaddr iova,
ram_addr_t size, void *vaddr, bool readonly);
int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size);
+int iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
+ enum iommu_hw_info_type *type,
+ void *data, uint32_t len, Error **errp);
#define TYPE_HIOD_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
OBJECT_DECLARE_TYPE(HIODIOMMUFD, HIODIOMMUFDClass, HIOD_IOMMUFD)
diff --git a/backends/iommufd.c b/backends/iommufd.c
index ef8b3a808b..559affa9ec 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -20,7 +20,6 @@
#include "monitor/monitor.h"
#include "trace.h"
#include <sys/ioctl.h>
-#include <linux/iommufd.h>
static void iommufd_backend_init(Object *obj)
{
@@ -212,6 +211,28 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t
ioas_id,
return ret;
}
+int iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
+ enum iommu_hw_info_type *type,
+ void *data, uint32_t len, Error **errp)
+{
+ struct iommu_hw_info info = {
+ .size = sizeof(info),
+ .dev_id = devid,
+ .data_len = len,
+ .data_uptr = (uintptr_t)data,
+ };
+ int ret;
+
+ ret = ioctl(be->fd, IOMMU_GET_HW_INFO, &info);
+ if (ret) {
+ error_setg_errno(errp, errno, "Failed to get hardware info");
+ } else {
+ *type = info.out_data_type;