FAILED: patch "[PATCH] drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists" failed to apply to 6.18-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.18-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-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x e70086a3a06d276b4a5d9a2c51c9330c6cf72780
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072902-gorgeous-negligee-5e08@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From e70086a3a06d276b4a5d9a2c51c9330c6cf72780 Mon Sep 17 00:00:00 2001
From: Ashutosh Dixit <ashutosh.dixit@intel.com>
Date: Mon, 15 Jun 2026 15:42:19 -0700
Subject: [PATCH] drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Unconditionally whitelisting OA registers is a security violation. Set
RING_FORCE_TO_NONPRIV_DENY bit in OA nonpriv slots, so that OA registers
don't get whitelisted by default after probe, gt reset, resume and engine
reset.

Fixes: 828a8eaf37c3 ("drm/xe/oa: Add MMIO trigger support")
Cc: stable@vger.kernel.org # v6.12+
Suggested-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260615224227.34880-2-ashutosh.dixit@intel.com
(cherry picked from commit 90511bdcfda97211c01f1d945d4ea616578d8fca)
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 fb65940848d7..d3bfc05949ae 100644
--- a/drivers/gpu/drm/xe/xe_reg_whitelist.c
+++ b/drivers/gpu/drm/xe/xe_reg_whitelist.c
@@ -104,10 +104,12 @@ static const struct xe_rtp_entry_sr register_whitelist[] = {
 				   RING_FORCE_TO_NONPRIV_ACCESS_RW))
 	},
 
+#define WHITELIST_DENY(r, f) WHITELIST(r, (f) | RING_FORCE_TO_NONPRIV_DENY)
+
 #define WHITELIST_OA_MMIO_TRG(trg, status, head) \
-	WHITELIST(trg, RING_FORCE_TO_NONPRIV_ACCESS_RW), \
-	WHITELIST(status, RING_FORCE_TO_NONPRIV_ACCESS_RD), \
-	WHITELIST(head, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4)
+	WHITELIST_DENY(trg, RING_FORCE_TO_NONPRIV_ACCESS_RW), \
+	WHITELIST_DENY(status, RING_FORCE_TO_NONPRIV_ACCESS_RD), \
+	WHITELIST_DENY(head, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4)
 
 #define WHITELIST_OAG_MMIO_TRG \
 	WHITELIST_OA_MMIO_TRG(OAG_MMIOTRIGGER, OAG_OASTATUS, OAG_OAHEADPTR)