On 11/14/23 11:09, Zhenzhong Duan wrote:
> This helper will be used by both legacy and iommufd backends.
>
> No functional changes intended.
>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
> Reviewed-by: Cédric Le Goater <clg@redhat.com>
> Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Eric
> ---
> hw/vfio/pci.h | 3 +++
> hw/vfio/pci.c | 54 +++++++++++++++++++++++++++++++++++----------------
> 2 files changed, 40 insertions(+), 17 deletions(-)
>
> diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
> index fba8737ab2..1006061afb 100644
> --- a/hw/vfio/pci.h
> +++ b/hw/vfio/pci.h
> @@ -218,6 +218,9 @@ void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr);
>
> extern const PropertyInfo qdev_prop_nv_gpudirect_clique;
>
> +int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
> + struct vfio_pci_hot_reset_info **info_p);
> +
> int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);
>
> int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index c62c02f7b6..eb55e8ae88 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -2445,22 +2445,13 @@ static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
> return (strcmp(tmp, name) == 0);
> }
>
> -static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
> +int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
> + struct vfio_pci_hot_reset_info **info_p)
> {
> - VFIOGroup *group;
> struct vfio_pci_hot_reset_info *info;
> - struct vfio_pci_dependent_device *devices;
> - struct vfio_pci_hot_reset *reset;
> - int32_t *fds;
> - int ret, i, count;
> - bool multi = false;
> + int ret, count;
>
> - trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
> -
> - if (!single) {
> - vfio_pci_pre_reset(vdev);
> - }
> - vdev->vbasedev.needs_reset = false;
> + assert(info_p && !*info_p);
>
> info = g_malloc0(sizeof(*info));
> info->argsz = sizeof(*info);
> @@ -2468,24 +2459,53 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
> ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
> if (ret && errno != ENOSPC) {
> ret = -errno;
> + g_free(info);
> if (!vdev->has_pm_reset) {
> error_report("vfio: Cannot reset device %s, "
> "no available reset mechanism.", vdev->vbasedev.name);
> }
> - goto out_single;
> + return ret;
> }
>
> count = info->count;
> - info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
> - info->argsz = sizeof(*info) + (count * sizeof(*devices));
> - devices = &info->devices[0];
> + info = g_realloc(info, sizeof(*info) + (count * sizeof(info->devices[0])));
> + info->argsz = sizeof(*info) + (count * sizeof(info->devices[0]));
>
> ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
> if (ret) {
> ret = -errno;
> + g_free(info);
> error_report("vfio: hot reset info failed: %m");
> + return ret;
> + }
> +
> + *info_p = info;
> + return 0;
> +}
> +
> +static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
> +{
> + VFIOGroup *group;
> + struct vfio_pci_hot_reset_info *info = NULL;
> + struct vfio_pci_dependent_device *devices;
> + struct vfio_pci_hot_reset *reset;
> + int32_t *fds;
> + int ret, i, count;
> + bool multi = false;
> +
> + trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
> +
> + if (!single) {
> + vfio_pci_pre_reset(vdev);
> + }
> + vdev->vbasedev.needs_reset = false;
> +
> + ret = vfio_pci_get_pci_hot_reset_info(vdev, &info);
> +
> + if (ret) {
> goto out_single;
> }
> + devices = &info->devices[0];
>
> trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
>