linux-kernel - [PATCH 13/26] drm/xe/pf: Remove GuC migration data save/restore from GT debugfs

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Message-ID: <20251011193847.1836454-14-michal.winiarski@intel.com>
Date: Sat, 11 Oct 2025 21:38:34 +0200
From: Michał Winiarski <michal.winiarski@...el.com>
To: Alex Williamson <alex.williamson@...hat.com>, Lucas De Marchi
	<lucas.demarchi@...el.com>, Thomas Hellström
	<thomas.hellstrom@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>, Kevin Tian
	<kevin.tian@...el.com>, Shameer Kolothum
	<shameerali.kolothum.thodi@...wei.com>, <intel-xe@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>
CC: <dri-devel@...ts.freedesktop.org>, Matthew Brost
	<matthew.brost@...el.com>, Michal Wajdeczko <michal.wajdeczko@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen
	<joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin <tursulin@...ulin.net>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, "Lukasz
 Laguna" <lukasz.laguna@...el.com>, Michał Winiarski
	<michal.winiarski@...el.com>
Subject: [PATCH 13/26] drm/xe/pf: Remove GuC migration data save/restore from GT debugfs

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.

Signed-off-by: Michał Winiarski <michal.winiarski@...el.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 c026a3910e7e3..c2b27dab13aa8 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c
@@ -320,9 +320,6 @@ 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)
@@ -386,47 +383,6 @@ 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
@@ -561,9 +517,6 @@ 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);
-- 
2.50.1