mirror of https://github.com/xemu-project/xemu.git
da3e04b26f
This gives management tools like libvirt a chance to open the vfio cdev with privilege and pass FD to qemu. This way qemu never needs to have privilege to open a VFIO or iommu cdev node. Together with the earlier support of pre-opening /dev/iommu device, now we have full support of passing a vfio device to unprivileged qemu by management tool. This mode is no more considered for the legacy backend. So let's remove the "TODO" comment. Add helper functions vfio_device_set_fd() and vfio_device_get_name() to set fd and get device name, they will also be used by other vfio devices. There is no easy way to check if a device is mdev with FD passing, so fail the x-balloon-allowed check unconditionally in this case. There is also no easy way to get BDF as name with FD passing, so we fake a name by VFIO_FD[fd]. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Tested-by: Eric Auger <eric.auger@redhat.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Cédric Le Goater <clg@redhat.com> |
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| .. | ||
| Kconfig | ||
| amd-xgbe.c | ||
| ap.c | ||
| calxeda-xgmac.c | ||
| ccw.c | ||
| common.c | ||
| container-base.c | ||
| container.c | ||
| display.c | ||
| helpers.c | ||
| igd.c | ||
| iommufd.c | ||
| meson.build | ||
| migration.c | ||
| pci-quirks.c | ||
| pci.c | ||
| pci.h | ||
| platform.c | ||
| spapr.c | ||
| trace-events | ||
| trace.h | ||