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authorZhenzhong Duan <zhenzhong.duan@intel.com>2023-11-21 16:44:15 +0800
committerCédric Le Goater <clg@redhat.com>2023-12-19 19:03:38 +0100
commite70f971a6c1230138843d7ab82267e4a5aaf6bda (patch)
tree7b093a6108e89a74ff2fdd3f4052de00594da056
parent5e7ba401b71d18544a3e44b2a58b9e63fd5148d5 (diff)
vfio/ccw: Allow the selection of a given iommu backend
Now we support two types of iommu backends, let's add the capability to select one of them. This depends on whether an iommufd object has been linked with the vfio-ccw device: If the user wants to use the legacy backend, it shall not link the vfio-ccw device with any iommufd object: -device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX This is called the legacy mode/backend. If the user wants to use the iommufd backend (/dev/iommu) it shall pass an iommufd object id in the vfio-ccw device options: -object iommufd,id=iommufd0 -device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX,iommufd=iommufd0 Suggested-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Reviewed-by: Eric Farman <farman@linux.ibm.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Cédric Le Goater <clg@redhat.com>
-rw-r--r--hw/vfio/ccw.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index d857bb8d0f..d2d58bb677 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -15,12 +15,14 @@
*/
#include "qemu/osdep.h"
+#include CONFIG_DEVICES /* CONFIG_IOMMUFD */
#include <linux/vfio.h>
#include <linux/vfio_ccw.h>
#include <sys/ioctl.h>
#include "qapi/error.h"
#include "hw/vfio/vfio-common.h"
+#include "sysemu/iommufd.h"
#include "hw/s390x/s390-ccw.h"
#include "hw/s390x/vfio-ccw.h"
#include "hw/qdev-properties.h"
@@ -677,6 +679,10 @@ static void vfio_ccw_unrealize(DeviceState *dev)
static Property vfio_ccw_properties[] = {
DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
+#ifdef CONFIG_IOMMUFD
+ DEFINE_PROP_LINK("iommufd", VFIOCCWDevice, vdev.iommufd,
+ TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *),
+#endif
DEFINE_PROP_END_OF_LIST(),
};