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vfio: Introduce vfio_get_vfio_device()

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This helper will be useful in the listener handlers to extract the
VFIO device from a memory region using memory_region_owner(). At the
moment, we only care for PCI passthrough devices. If the need arises,
we will add more.

Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250206131438.1505542-5-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Cédric Le Goater 2025-02-06 14:14:32 +01:00
parent cdc6f2e0c9
commit 80936cf7f3
2 changed files with 11 additions and 0 deletions
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10
hw/vfio/helpers.c
View file

@ -23,6 +23,7 @@
#include <sys/ioctl.h>
#include "hw/vfio/vfio-common.h"
#include "hw/vfio/pci.h"
#include "hw/hw.h"
#include "trace.h"
#include "qapi/error.h"
@ -728,3 +729,12 @@ bool vfio_device_hiod_realize(VFIODevice *vbasedev, Error **errp)
return HOST_IOMMU_DEVICE_GET_CLASS(hiod)->realize(hiod, vbasedev, errp);
}
VFIODevice *vfio_get_vfio_device(Object *obj)
{
if (object_dynamic_cast(obj, TYPE_VFIO_PCI)) {
return &VFIO_PCI(obj)->vbasedev;
} else {
return NULL;
}
}

1
include/hw/vfio/vfio-common.h
View file

@ -252,6 +252,7 @@ bool vfio_device_hiod_realize(VFIODevice *vbasedev, Error **errp);
bool vfio_attach_device(char *name, VFIODevice *vbasedev,
AddressSpace *as, Error **errp);
void vfio_detach_device(VFIODevice *vbasedev);
VFIODevice *vfio_get_vfio_device(Object *obj);
int vfio_kvm_device_add_fd(int fd, Error **errp);
int vfio_kvm_device_del_fd(int fd, Error **errp);