Hi Zhenzhong,
On 9/26/23 13:32, Zhenzhong Duan wrote:
> Introduce two new helpers, vfio_kvm_device_[add/del]_fd
> which take as input a file descriptor which can be either a group fd or
> a cdev fd. This uses the new KVM_DEV_VFIO_FILE VFIO KVM device group,
> which aliases to the legacy KVM_DEV_VFIO_GROUP.
>
> vfio_kvm_device_[add/del]_group then call those new helpers.
>
> Signed-off-by: Yi Liu <yi.l....@intel.com>
> Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
> ---
> include/hw/vfio/vfio-common.h | 3 ++
> hw/vfio/common.c | 55 +++++++++++++++++++++++++----------
> 2 files changed, 42 insertions(+), 16 deletions(-)
>
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index e0483893d1..c4e7c3b4a7 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -226,6 +226,9 @@ struct vfio_device_info *vfio_get_device_info(int fd);
> int vfio_get_device(VFIOGroup *group, const char *name,
> VFIODevice *vbasedev, Error **errp);
>
> +int vfio_kvm_device_add_fd(int fd, Error **errp);
> +int vfio_kvm_device_del_fd(int fd, Error **errp);
> +
> extern const MemoryRegionOps vfio_region_ops;
> typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList;
> extern VFIOGroupList vfio_group_list;
> diff --git a/hw/vfio/common.c b/hw/vfio/common.c
> index de6b4a86e2..959b1362bb 100644
> --- a/hw/vfio/common.c
> +++ b/hw/vfio/common.c
> @@ -1818,17 +1818,17 @@ void vfio_reset_handler(void *opaque)
> }
> }
>
> -static void vfio_kvm_device_add_group(VFIOGroup *group)
> +int vfio_kvm_device_add_fd(int fd, Error **errp)
> {
> #ifdef CONFIG_KVM
> struct kvm_device_attr attr = {
> - .group = KVM_DEV_VFIO_GROUP,
> - .attr = KVM_DEV_VFIO_GROUP_ADD,
> - .addr = (uint64_t)(unsigned long)&group->fd,
> + .group = KVM_DEV_VFIO_FILE,
> + .attr = KVM_DEV_VFIO_FILE_ADD,
> + .addr = (uint64_t)(unsigned long)&fd,
> };
>
> if (!kvm_enabled()) {
> - return;
> + return 0;
> }
>
> if (vfio_kvm_device_fd < 0) {
> @@ -1837,38 +1837,61 @@ static void vfio_kvm_device_add_group(VFIOGroup
> *group)
> };
>
> if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
> - error_report("Failed to create KVM VFIO device: %m");
> - return;
> + 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_report("Failed to add group %d to KVM VFIO device: %m",
> - group->groupid);
> + error_setg_errno(errp, errno, "Failed to add fd %d to KVM VFIO
> device",
> + fd);
> + return -errno;
> }
> #endif
> + return 0;
> }
>
> -static void vfio_kvm_device_del_group(VFIOGroup *group)
> +int vfio_kvm_device_del_fd(int fd, Error **errp)
> {
> #ifdef CONFIG_KVM
> struct kvm_device_attr attr = {
> - .group = KVM_DEV_VFIO_GROUP,
> - .attr = KVM_DEV_VFIO_GROUP_DEL,
> - .addr = (uint64_t)(unsigned long)&group->fd,
> + .group = KVM_DEV_VFIO_FILE,
> + .attr = KVM_DEV_VFIO_FILE_DEL,
> + .addr = (uint64_t)(unsigned long)&fd,
> };
>
> if (vfio_kvm_device_fd < 0) {
> - return;
> + error_setg(errp, "KVM VFIO device isn't created yet");
> + return -EINVAL;
> }
>
> if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
> - error_report("Failed to remove group %d from KVM VFIO device: %m",
> - group->groupid);
> + error_setg_errno(errp, errno,
> + "Failed to remove fd %d from KVM VFIO device", fd);
> + return -errno;
> }
> #endif
> + return 0;
> +}
> +
> +static void vfio_kvm_device_add_group(VFIOGroup *group)
> +{
> + Error *err = NULL;
> +
> + if (vfio_kvm_device_add_fd(group->fd, &err)) {
> + error_reportf_err(err, "group ID %d: ", group->groupid);
> + }
> +}
> +
> +static void vfio_kvm_device_del_group(VFIOGroup *group)
> +{
> + Error *err = NULL;
> +
> + if (vfio_kvm_device_del_fd(group->fd, &err)) {
> + error_reportf_err(err, "group ID %d: ", group->groupid);
> + }
> }
>
> static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
Looks good to me
Reviewed-by: Eric Auger <eric.au...@redhat.com>
Thanks
Eric
