On Wed, 30 Aug 2023 18:37:37 +0800
Zhenzhong Duan <zhenzhong.duan@intel.com> wrote:
> ...which will be used by both legacy and iommufd backend.
+1 to Eric's comments regarding complete sentences in the commit log
and suggested description.
>
> Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
> ---
> hw/vfio/common.c | 44 +++++++++++++++++++++++------------
> include/hw/vfio/vfio-common.h | 3 +++
> 2 files changed, 32 insertions(+), 15 deletions(-)
>
> diff --git a/hw/vfio/common.c b/hw/vfio/common.c
> index 67150e4575..949ad6714a 100644
> --- a/hw/vfio/common.c
> +++ b/hw/vfio/common.c
> @@ -1759,17 +1759,17 @@ void vfio_reset_handler(void *opaque)
> }
> }
>
> -static void vfio_kvm_device_add_group(VFIOGroup *group)
> +int vfio_kvm_device_add_fd(int fd)
Returning int vs void looks gratuitous, nothing uses the return value
in this series.
> {
> #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) {
> @@ -1779,37 +1779,51 @@ 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;
> + return -ENODEV;
> }
>
> 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_report("Failed to add fd %d to KVM VFIO device: %m",
> + fd);
It's not nearly as useful to report an fd# in the error log vs the
group#. Thanks,
Alex
> + return -errno;
> }
> #endif
> + return 0;
> }
>
> -static void vfio_kvm_device_del_group(VFIOGroup *group)
> +static void vfio_kvm_device_add_group(VFIOGroup *group)
> +{
> + vfio_kvm_device_add_fd(group->fd);
> +}
> +
> +int vfio_kvm_device_del_fd(int fd)
> {
> #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;
> + 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_report("Failed to remove fd %d from KVM VFIO device: %m",
> + fd);
> + return -EBADF;
> }
> #endif
> + return 0;
> +}
> +
> +static void vfio_kvm_device_del_group(VFIOGroup *group)
> +{
> + vfio_kvm_device_del_fd(group->fd);
> }
>
> static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index 5e376c436e..598c3ce079 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -220,6 +220,9 @@ 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);
> +int vfio_kvm_device_del_fd(int fd);
> +
> extern const MemoryRegionOps vfio_region_ops;
> typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList;
> extern VFIOGroupList vfio_group_list;