linux-kernel - [PATCH v2 24/26] drm/xe/pf: Enable SR-IOV VF migration for PTL and BMG

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Message-ID: <20251021224133.577765-25-michal.winiarski@intel.com>
Date: Wed, 22 Oct 2025 00:41:31 +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>, <intel-xe@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>, Matthew Brost
	<matthew.brost@...el.com>, Michal Wajdeczko <michal.wajdeczko@...el.com>
CC: <dri-devel@...ts.freedesktop.org>, 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 v2 24/26] drm/xe/pf: Enable SR-IOV VF migration for PTL and BMG

All of the necessary building blocks are now in place for PTL and BMG to
support SR-IOV VF migration.
Enable the feature without the need to pass feature enabling debug flags
for those platforms.

Signed-off-by: Michał Winiarski <michal.winiarski@...el.com>
---
 drivers/gpu/drm/xe/xe_device.h             | 5 +++++
 drivers/gpu/drm/xe/xe_device_types.h       | 2 ++
 drivers/gpu/drm/xe/xe_pci.c                | 8 ++++++--
 drivers/gpu/drm/xe/xe_pci_types.h          | 1 +
 drivers/gpu/drm/xe/xe_sriov_pf_migration.c | 4 +++-
 5 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index 32cc6323b7f64..0c4404c78227c 100644
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -152,6 +152,11 @@ static inline bool xe_device_has_sriov(struct xe_device *xe)
 	return xe->info.has_sriov;
 }
 
+static inline bool xe_device_has_sriov_vf_migration(struct xe_device *xe)
+{
+	return xe->info.has_sriov_vf_migration;
+}
+
 static inline bool xe_device_has_msix(struct xe_device *xe)
 {
 	return xe->irq.msix.nvec > 0;
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 02c04ad7296e4..8973e17b9a359 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -311,6 +311,8 @@ struct xe_device {
 		u8 has_range_tlb_inval:1;
 		/** @info.has_sriov: Supports SR-IOV */
 		u8 has_sriov:1;
+		/** @info.has_sriov_vf_migration: Supports SR-IOV VF migration */
+		u8 has_sriov_vf_migration:1;
 		/** @info.has_usm: Device has unified shared memory support */
 		u8 has_usm:1;
 		/** @info.has_64bit_timestamp: Device supports 64-bit timestamps */
diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index c3136141a9536..d4f9ee9d020b2 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -362,6 +362,7 @@ static const struct xe_device_desc bmg_desc = {
 	.has_heci_cscfi = 1,
 	.has_late_bind = true,
 	.has_sriov = true,
+	.has_sriov_vf_migration = true,
 	.max_gt_per_tile = 2,
 	.needs_scratch = true,
 	.subplatforms = (const struct xe_subplatform_desc[]) {
@@ -378,6 +379,7 @@ static const struct xe_device_desc ptl_desc = {
 	.has_display = true,
 	.has_flat_ccs = 1,
 	.has_sriov = true,
+	.has_sriov_vf_migration = true,
 	.max_gt_per_tile = 2,
 	.needs_scratch = true,
 	.needs_shared_vf_gt_wq = true,
@@ -657,6 +659,7 @@ static int xe_info_init_early(struct xe_device *xe,
 	xe->info.has_pxp = desc->has_pxp;
 	xe->info.has_sriov = xe_configfs_primary_gt_allowed(to_pci_dev(xe->drm.dev)) &&
 		desc->has_sriov;
+	xe->info.has_sriov_vf_migration = desc->has_sriov_vf_migration;
 	xe->info.skip_guc_pc = desc->skip_guc_pc;
 	xe->info.skip_mtcfg = desc->skip_mtcfg;
 	xe->info.skip_pcode = desc->skip_pcode;
@@ -1020,9 +1023,10 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		xe_step_name(xe->info.step.media),
 		xe_step_name(xe->info.step.basedie));
 
-	drm_dbg(&xe->drm, "SR-IOV support: %s (mode: %s)\n",
+	drm_dbg(&xe->drm, "SR-IOV support: %s (mode: %s) (VF migration: %s)\n",
 		str_yes_no(xe_device_has_sriov(xe)),
-		xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
+		xe_sriov_mode_to_string(xe_device_sriov_mode(xe)),
+		str_yes_no(xe_device_has_sriov_vf_migration(xe)));
 
 	err = xe_pm_init_early(xe);
 	if (err)
diff --git a/drivers/gpu/drm/xe/xe_pci_types.h b/drivers/gpu/drm/xe/xe_pci_types.h
index a4451bdc79fb3..40f158b3ac890 100644
--- a/drivers/gpu/drm/xe/xe_pci_types.h
+++ b/drivers/gpu/drm/xe/xe_pci_types.h
@@ -48,6 +48,7 @@ struct xe_device_desc {
 	u8 has_mbx_power_limits:1;
 	u8 has_pxp:1;
 	u8 has_sriov:1;
+	u8 has_sriov_vf_migration:1;
 	u8 needs_scratch:1;
 	u8 skip_guc_pc:1;
 	u8 skip_mtcfg:1;
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_migration.c b/drivers/gpu/drm/xe/xe_sriov_pf_migration.c
index 88babec9c893e..a6cf3b57edba1 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_migration.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_migration.c
@@ -50,7 +50,9 @@ bool xe_sriov_pf_migration_supported(struct xe_device *xe)
 
 static bool pf_check_migration_support(struct xe_device *xe)
 {
-	/* XXX: for now this is for feature enabling only */
+	if (xe_device_has_sriov_vf_migration(xe))
+		return true;
+
 	return IS_ENABLED(CONFIG_DRM_XE_DEBUG);
 }
 
-- 
2.50.1