This is a note to let you know that I've just added the patch titled
drm/i915: Convert unconditional clflush to drm_clflush_virt_range()
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-convert-unconditional-clflush-to-drm_clflush_virt_range.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fcf918ffd3b35e288097036c04af7446b2c6f2f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Thu, 14 Oct 2021 12:09:39 +0300
Subject: drm/i915: Convert unconditional clflush to drm_clflush_virt_range()
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit fcf918ffd3b35e288097036c04af7446b2c6f2f1 upstream.
This one is apparently a "clflush for good measure", so bit more
justification (if you can call it that) than some of the others.
Convert to drm_clflush_virt_range() again so that machines without
clflush will survive the ordeal.
Cc: stable@xxxxxxxxxxxxxxx
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxx> #v1
Fixes: 12ca695d2c1e ("drm/i915: Do not share hwsp across contexts any more, v8.")
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20211014090941.12159-3-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Dave Airlie <airlied@xxxxxxxxxx>
(cherry picked from commit af7b6d234eefa30c461cc16912bafb32b9e6141c)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_timeline.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -225,7 +225,7 @@ void intel_timeline_reset_seqno(const st
memset(hwsp_seqno + 1, 0, TIMELINE_SEQNO_BYTES - sizeof(*hwsp_seqno));
WRITE_ONCE(*hwsp_seqno, tl->seqno);
- clflush(hwsp_seqno);
+ drm_clflush_virt_range(hwsp_seqno, TIMELINE_SEQNO_BYTES);
}
void intel_timeline_enter(struct intel_timeline *tl)
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-5.14/drm-i915-dp-skip-the-hw-readout-of-dpcd-on-disabled-encoders.patch
queue-5.14/drm-i915-catch-yet-another-unconditioal-clflush.patch
queue-5.14/drm-i915-convert-unconditional-clflush-to-drm_clflush_virt_range.patch
