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| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2023-11-21 16:44:13 +0800 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2023-12-19 19:03:38 +0100 |
| commit | 336f308958d598f3db351bb7d94cc57b4b2d448d (patch) | |
| tree | 649cc76d5bac75dd040834fdfe1cb0345a0300e0 /hw/vfio | |
| parent | 3016e60f8f715d2058a48e4956be994482c5e218 (diff) | |
| download | qemu-336f308958d598f3db351bb7d94cc57b4b2d448d.zip qemu-336f308958d598f3db351bb7d94cc57b4b2d448d.tar.gz qemu-336f308958d598f3db351bb7d94cc57b4b2d448d.tar.bz2 | |
vfio/ap: 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-ap device:
if the user wants to use the legacy backend, it shall not
link the vfio-ap device with any iommufd object:
-device vfio-ap,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-ap device options:
-object iommufd,id=iommufd0
-device vfio-ap,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>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'hw/vfio')
| -rw-r--r-- | hw/vfio/ap.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index bbf69ff..8062960 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -11,10 +11,12 @@ */ #include "qemu/osdep.h" +#include CONFIG_DEVICES /* CONFIG_IOMMUFD */ #include <linux/vfio.h> #include <sys/ioctl.h> #include "qapi/error.h" #include "hw/vfio/vfio-common.h" +#include "sysemu/iommufd.h" #include "hw/s390x/ap-device.h" #include "qemu/error-report.h" #include "qemu/event_notifier.h" @@ -204,6 +206,10 @@ static void vfio_ap_unrealize(DeviceState *dev) static Property vfio_ap_properties[] = { DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev), +#ifdef CONFIG_IOMMUFD + DEFINE_PROP_LINK("iommufd", VFIOAPDevice, vdev.iommufd, + TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *), +#endif DEFINE_PROP_END_OF_LIST(), }; |