[PATCH V18 10/14] drm/xe/ras: Cache bad_page_reservation policy at init

[Tejas Upadhyay <tejas.upadhyay@intel.com>]

The configfs bad_page_reservation attribute can only be set before
device bind, so its value is immutable at runtime. Cache it in
struct xe_drm_ras during xe_drm_ras_init() to avoid repeated configfs
lookups on every fault.

Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/xe/xe_drm_ras_types.h | 3 +++
 drivers/gpu/drm/xe/xe_ras.c           | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_drm_ras_types.h b/drivers/gpu/drm/xe/xe_drm_ras_types.h
index 8d729ad6a264..83899cf04793 100644
--- a/drivers/gpu/drm/xe/xe_drm_ras_types.h
+++ b/drivers/gpu/drm/xe/xe_drm_ras_types.h
@@ -43,6 +43,9 @@ struct xe_drm_ras {
 
 	/** @info: info array for all types of errors */
 	struct xe_drm_ras_counter *info[DRM_XE_RAS_ERR_SEV_MAX];
+
+	/** @bad_page_reservation: cached configfs policy, immutable after init */
+	bool bad_page_reservation;
 };
 
 #endif
diff --git a/drivers/gpu/drm/xe/xe_ras.c b/drivers/gpu/drm/xe/xe_ras.c
index d25d25f77531..c7e86ae0e8ad 100644
--- a/drivers/gpu/drm/xe/xe_ras.c
+++ b/drivers/gpu/drm/xe/xe_ras.c
@@ -3,6 +3,7 @@
  * Copyright © 2026 Intel Corporation
  */
 
+#include "xe_configfs.h"
 #include "xe_debugfs.h"
 #include "xe_device.h"
 #include "xe_drm_ras.h"
@@ -804,6 +805,10 @@ void xe_ras_init(struct xe_device *xe)
 {
 	int ret;
 
+	if (xe->info.platform == XE_CRESCENTISLAND)
+		xe->ras.bad_page_reservation =
+			xe_configfs_get_bad_page_reservation(to_pci_dev(xe->drm.dev));
+
 	xe_drm_ras_init(xe);
 
 	if (!xe->info.has_sysctrl)
-- 
2.52.0