Subject: FAILED: patch "[PATCH] drm/xe/rtp: Save OA nonpriv registers to register" failed to apply to 7.1-stable tree
To: ashutosh.dixit@intel.com,thomas.hellstrom@linux.intel.com,umesh.nerlige.ramappa@intel.com
Cc: <stable@vger.kernel.org>
From: <gregkh@linuxfoundation.org>
Date: Wed, 29 Jul 2026 13:07:46 +0200
Message-ID: <2026072946-bucktooth-shell-92f5@gregkh>
Precedence: bulk
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The patch below does not apply to the 7.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-7.1.y
git checkout FETCH_HEAD
git cherry-pick -x a19a83721a28ccaddace846da70da5c53d7dd052
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072946-bucktooth-shell-92f5@gregkh' --subject-prefix 'PATCH 7.1.y' 'HEAD^..'

Possible dependencies:


thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a19a83721a28ccaddace846da70da5c53d7dd052 Mon Sep 17 00:00:00 2001
From: Ashutosh Dixit <ashutosh.dixit@intel.com>
Date: Mon, 15 Jun 2026 15:42:23 -0700
Subject: [PATCH] drm/xe/rtp: Save OA nonpriv registers to register
 save/restore lists
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Now we can save OA whitelisting nonpriv registers to register save/restore
lists. OA nonpriv registers are saved to both hwe->oa_sr as well as
hwe->reg_sr.

During probe, resume and gt-reset flows KMD will apply hwe->reg_sr,
ensuring OA registers are de-whitelisted after these events. For
engine-reset, hwe->reg_sr is registered with GuC and GuC will apply these
registers, ensuring OA registers are de-whitelisted after engine resets.

hwe->oa_sr is used for whitelisting or de-whitelisting OA registers during
OA operation, by toggling the 'deny' bit on oa stream open/close.

Fixes: 828a8eaf37c3 ("drm/xe/oa: Add MMIO trigger support")
Cc: stable@vger.kernel.org # v6.12+
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260615224227.34880-6-ashutosh.dixit@intel.com
(cherry picked from commit 3a3c3e56db2923daaf1a5353cd6463a4cdaf4ffa)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_reg_whitelist.c b/drivers/gpu/drm/xe/xe_reg_whitelist.c
index e9d0a0b82527..76ac23644a4d 100644
--- a/drivers/gpu/drm/xe/xe_reg_whitelist.c
+++ b/drivers/gpu/drm/xe/xe_reg_whitelist.c
@@ -215,6 +215,18 @@ void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe)
 	first_oa_slot = whitelist_apply_to_hwe(hwe, &hwe->reg_whitelist, &hwe->reg_sr, 0);
 
 	xe_rtp_process_to_sr(&ctx, &oa_whitelist, &hwe->oa_whitelist, false);
+
+	/*
+	 * Save oa nonpriv registers to hwe->oa_sr, from which oa registers are whitelisted
+	 * or de-whitelisted, by toggling the 'deny' bit on oa stream open/close
+	 */
+	whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->oa_sr, first_oa_slot);
+
+	/*
+	 * Also save oa nonpriv registers to hwe->reg_sr, to ensure oa registers are not
+	 * whitelisted by default after probe, gt reset, resume and engine reset
+	 */
+	whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->reg_sr, first_oa_slot);
 }
 
 /**