From: Matthew Brost <matthew.brost@intel.com>
Date: Wed, 26 Nov 2025 18:59:47 +0000 (-0800)
Subject: drm/xe: Add pat_index to properties line in VM snapshot capture
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6cf5d14a0bf730d6e45c407b7e3bedb1a5d8812f;p=thirdparty%2Fkernel%2Flinux.git

drm/xe: Add pat_index to properties line in VM snapshot capture

Add pat index to properties line in VM snapshot capture indicating
the VMA caching properites. This is useful information for debug and
will help build a robust GPU hang replay tool.

The current format is:

[<vma address>]: <permissions>|<type>|mem_region=0x%x|pat_index=%d

Permissions has two options, either "read_only" or "read_write".

Type has three options, either "userptr", "null_sparse", or "bo".

Memory region is a bit mask of where the memory is located.

Pat index corresponds to the value setup upon VM bind.

Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patch.msgid.link/20251126185952.546277-5-matthew.brost@intel.com
---

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index f2cf95d23bd0..b298953d2eed 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -4052,6 +4052,7 @@ struct xe_vm_snapshot {
 #define XE_VM_SNAP_FLAG_IS_NULL		BIT(2)
 		unsigned long flags;
 		int uapi_mem_region;
+		int pat_index;
 		struct xe_bo *bo;
 		void *data;
 		struct mm_struct *mm;
@@ -4094,6 +4095,7 @@ struct xe_vm_snapshot *xe_vm_snapshot_capture(struct xe_vm *vm)
 		snap->snap[i].len = xe_vma_size(vma);
 		snap->snap[i].flags = xe_vma_read_only(vma) ?
 			XE_VM_SNAP_FLAG_READ_ONLY : 0;
+		snap->snap[i].pat_index = vma->attr.pat_index;
 		if (bo) {
 			snap->snap[i].bo = xe_bo_get(bo);
 			snap->snap[i].bo_ofs = xe_vma_bo_offset(vma);
@@ -4195,7 +4197,7 @@ void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p)
 	for (i = 0; i < snap->num_snaps; i++) {
 		drm_printf(p, "[%llx].length: 0x%lx\n", snap->snap[i].ofs, snap->snap[i].len);
 
-		drm_printf(p, "[%llx].properties: %s|%s|mem_region=0x%lx\n",
+		drm_printf(p, "[%llx].properties: %s|%s|mem_region=0x%lx|pat_index=%d\n",
 			   snap->snap[i].ofs,
 			   snap->snap[i].flags & XE_VM_SNAP_FLAG_READ_ONLY ?
 			   "read_only" : "read_write",
@@ -4204,7 +4206,8 @@ void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p)
 			   snap->snap[i].flags & XE_VM_SNAP_FLAG_USERPTR ?
 			   "userptr" : "bo",
 			   snap->snap[i].uapi_mem_region == -1 ? 0 :
-			   BIT(snap->snap[i].uapi_mem_region));
+			   BIT(snap->snap[i].uapi_mem_region),
+			   snap->snap[i].pat_index);
 
 		if (IS_ERR(snap->snap[i].data)) {
 			drm_printf(p, "[%llx].error: %li\n", snap->snap[i].ofs,