Re: [PATCH 13/24] drm/xe/pf: Remove GuC migration data save/restore from GT debugfs

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

On Wed, Nov 12, 2025 at 02:22:09PM +0100, Michał Winiarski wrote:
> In upcoming changes, SR-IOV VF migration data will be extended beyond
> GuC data and exported to userspace using VFIO interface (with a
> vendor-specific variant driver) and a device-level debugfs interface.
> Remove the GT-level debugfs.

Perhaps this should be retained while we don't have the xe-vfio?

> 
> Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
> Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
> ---
>  drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c | 47 ---------------------
>  1 file changed, 47 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c
> index 838beb7f6327f..5278ea4fd6552 100644
> --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c
> +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c
> @@ -327,9 +327,6 @@ static const struct {
>  	{ "stop", xe_gt_sriov_pf_control_stop_vf },
>  	{ "pause", xe_gt_sriov_pf_control_pause_vf },
>  	{ "resume", xe_gt_sriov_pf_control_resume_vf },
> -#ifdef CONFIG_DRM_XE_DEBUG_SRIOV
> -	{ "restore!", xe_gt_sriov_pf_migration_restore_guc_state },
> -#endif
>  };
>  
>  static ssize_t control_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
> @@ -393,47 +390,6 @@ static const struct file_operations control_ops = {
>  	.llseek		= default_llseek,
>  };
>  
> -/*
> - *      /sys/kernel/debug/dri/BDF/
> - *      ├── sriov
> - *      :   ├── vf1
> - *          :   ├── tile0
> - *              :   ├── gt0
> - *                  :   ├── guc_state
> - */
> -
> -static ssize_t guc_state_read(struct file *file, char __user *buf,
> -			      size_t count, loff_t *pos)
> -{
> -	struct dentry *dent = file_dentry(file);
> -	struct dentry *parent = dent->d_parent;
> -	struct xe_gt *gt = extract_gt(parent);
> -	unsigned int vfid = extract_vfid(parent);
> -
> -	return xe_gt_sriov_pf_migration_read_guc_state(gt, vfid, buf, count, pos);
> -}
> -
> -static ssize_t guc_state_write(struct file *file, const char __user *buf,
> -			       size_t count, loff_t *pos)
> -{
> -	struct dentry *dent = file_dentry(file);
> -	struct dentry *parent = dent->d_parent;
> -	struct xe_gt *gt = extract_gt(parent);
> -	unsigned int vfid = extract_vfid(parent);
> -
> -	if (*pos)
> -		return -EINVAL;
> -
> -	return xe_gt_sriov_pf_migration_write_guc_state(gt, vfid, buf, count);
> -}
> -
> -static const struct file_operations guc_state_ops = {
> -	.owner		= THIS_MODULE,
> -	.read		= guc_state_read,
> -	.write		= guc_state_write,
> -	.llseek		= default_llseek,
> -};
> -
>  /*
>   *      /sys/kernel/debug/dri/BDF/
>   *      ├── sriov
> @@ -568,9 +524,6 @@ static void pf_populate_gt(struct xe_gt *gt, struct dentry *dent, unsigned int v
>  
>  		/* for testing/debugging purposes only! */
>  		if (IS_ENABLED(CONFIG_DRM_XE_DEBUG)) {
> -			debugfs_create_file("guc_state",
> -					    IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV) ? 0600 : 0400,
> -					    dent, NULL, &guc_state_ops);
>  			debugfs_create_file("config_blob",
>  					    IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV) ? 0600 : 0400,
>  					    dent, NULL, &config_blob_ops);
> -- 
> 2.51.2
>