From: Greg KH <gregkh@linuxfoundation.org>
To: Jia Yao <jia.yao@intel.com>
Cc: stable@vger.kernel.org,
"Gwan-gyeong Mun" <gwan-gyeong.mun@intel.com>,
"Matthew Auld" <matthew.auld@intel.com>,
"Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Subject: Re: [PATCH 6.18.y 3/3] drm/xe/guc_ads: use uncached mapping for UM queue BO
Date: Tue, 25 Aug 2026 10:28:50 +0200 [thread overview]
Message-ID: <2026082551-promotion-liberty-83d3@gregkh> (raw)
In-Reply-To: <20260825034224.642641-3-jia.yao@intel.com>
On Tue, Aug 25, 2026 at 03:42:24AM +0000, Jia Yao wrote:
> On Pre-Xe3p platform, the GAM write the UM queue through DPA using UC.
> if GuC reads the queue via GGTT (WB), stale data may be observed
> when the cacheline has been polluted by another agent.
>
> To match the GAM's UC writes, configure the GuC mapping as UC as well.
>
> Fixes: 9c57bc08652a ("drm/xe/lnl: Drop force_probe requirement")
> Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> Cc: Matthew Auld <matthew.auld@intel.com>
> Cc: <stable@vger.kernel.org> # v6.12+
> Signed-off-by: Jia Yao <jia.yao@intel.com>
> Reviewed by: Matthew Auld <matthew.auld@intel.com>
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Link: https://patch.msgid.link/20260804165057.129529-4-jia.yao@intel.com
> (cherry picked from commit 9daa302a82590eeee7bdc68023ddad302df4b88c)
Same here, invalid git commit id.
You all really screw yourself with the bizarre "cherry-pick backwards in
time" model :(
Please reconsider it as it seems to cause nothing but trouble.
greg k-h
next prev parent reply other threads:[~2026-08-25 8:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 11:13 FAILED: patch "[PATCH] drm/xe/guc_ads: allocate UM queues in a separate BO" failed to apply to 6.18-stable tree gregkh
2026-08-20 16:08 ` [PATCH 6.18.y] drm/xe/guc_ads: allocate UM queues in a separate BO Jia Yao
2026-08-24 16:52 ` [PATCH 1/3] " Jia Yao
2026-08-24 16:52 ` [PATCH 2/3] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX Jia Yao
2026-08-24 16:52 ` [PATCH 3/3] drm/xe/guc_ads: use uncached mapping for UM queue BO Jia Yao
2026-08-24 17:02 ` [PATCH 1/3] drm/xe/guc_ads: allocate UM queues in a separate BO Greg KH
2026-08-24 17:12 ` Yao, Jia
2026-08-25 3:45 ` Yao, Jia
2026-08-25 3:42 ` [PATCH 6.18.y " Jia Yao
2026-08-25 3:42 ` [PATCH 6.18.y 2/3] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX Jia Yao
2026-08-25 8:27 ` Greg KH
2026-08-25 3:42 ` [PATCH 6.18.y 3/3] drm/xe/guc_ads: use uncached mapping for UM queue BO Jia Yao
2026-08-25 8:28 ` Greg KH [this message]
2026-08-25 23:27 ` Yao, Jia
2026-08-25 8:27 ` [PATCH 6.18.y 1/3] drm/xe/guc_ads: allocate UM queues in a separate BO Greg KH
2026-08-25 23:30 ` Jia Yao
2026-08-25 23:30 ` [PATCH 6.18.y 2/3] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX Jia Yao
2026-08-25 23:30 ` [PATCH 6.18.y 3/3] drm/xe/guc_ads: use uncached mapping for UM queue BO Jia Yao
2026-08-27 5:17 ` [PATCH 6.18.y 1/3] drm/xe/guc_ads: allocate UM queues in a separate BO Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2026082551-promotion-liberty-83d3@gregkh \
--to=gregkh@linuxfoundation.org \
--cc=gwan-gyeong.mun@intel.com \
--cc=jia.yao@intel.com \
--cc=matthew.auld@intel.com \
--cc=stable@vger.kernel.org \
--cc=thomas.hellstrom@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.