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vfio: Move vfio_kvm_device_add/del_fd() to helpers.c

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vfio_kvm_device_add/del_fd() are low level routines. Move them with
the other helpers.

Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: John Levon <john.levon@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20250318095415.670319-18-clg@redhat.com
Link: https://lore.kernel.org/qemu-devel/20250326075122.1299361-19-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Cédric Le Goater 2025-03-26 08:51:03 +01:00
parent f6d7f5d02b
commit 545256134f
6 changed files with 64 additions and 62 deletions
Download patch file Download diff file Expand all files Collapse all files

59
hw/vfio/helpers.c
View file

@ -22,6 +22,7 @@
#include "qemu/osdep.h"
#include <sys/ioctl.h>
#include "system/kvm.h"
#include "hw/vfio/vfio-common.h"
#include "hw/vfio/pci.h"
#include "hw/hw.h"
@ -253,6 +254,64 @@ bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info,
return true;
}
int vfio_kvm_device_add_fd(int fd, Error **errp)
{
#ifdef CONFIG_KVM
struct kvm_device_attr attr = {
.group = KVM_DEV_VFIO_FILE,
.attr = KVM_DEV_VFIO_FILE_ADD,
.addr = (uint64_t)(unsigned long)&fd,
};
if (!kvm_enabled()) {
return 0;
}
if (vfio_kvm_device_fd < 0) {
struct kvm_create_device cd = {
.type = KVM_DEV_TYPE_VFIO,
};
if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
error_setg_errno(errp, errno, "Failed to create KVM VFIO device");
return -errno;
}
vfio_kvm_device_fd = cd.fd;
}
if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
error_setg_errno(errp, errno, "Failed to add fd %d to KVM VFIO device",
fd);
return -errno;
}
#endif
return 0;
}
int vfio_kvm_device_del_fd(int fd, Error **errp)
{
#ifdef CONFIG_KVM
struct kvm_device_attr attr = {
.group = KVM_DEV_VFIO_FILE,
.attr = KVM_DEV_VFIO_FILE_DEL,
.addr = (uint64_t)(unsigned long)&fd,
};
if (vfio_kvm_device_fd < 0) {
error_setg(errp, "KVM VFIO device isn't created yet");
return -EINVAL;
}
if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
error_setg_errno(errp, errno,
"Failed to remove fd %d from KVM VFIO device", fd);
return -errno;
}
#endif
return 0;
}
int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
uint32_t subtype, struct vfio_region_info **info)
{