From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 385A13DB337 for ; Tue, 25 Aug 2026 08:27:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787646428; cv=none; b=bcbnmaQCZGZxhXmJ1iKA6tnLPTWOMIaUnSUNZS8C0RvV9r65hJqv/J9YPCgEXF9uyDg2rMJ9rFGjZgkkYTtZDkhGTrKewKrn8dTxP8bG3wZTpp38r50wQtjxWLoCx01g43Qaph/kKMbkkVc69lrIrue/SI2TMJ64izXKlklDa+8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787646428; c=relaxed/simple; bh=MJpAjeL8gGvLuSsCwNIvRKi+YIEv9RIbRN/Bu5A17Yk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=e14F4KPylVrSZH4PGQ1sNT0aElqWP8A8rTTCIJDmwfYuVsl7JlrOMkPlg6dNePywniqCas3Oo5KZEE4hI80NGmLYk5rBn/+sQQJmUaqnv+yIU6pvUMCgOs3B2Jf7CbE5sIrtw3tY/ANfg3XdQTcqzP3QQfNK9KpUxbNIB4UeXhc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YVql98C3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="YVql98C3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D99CE1F000E9; Tue, 25 Aug 2026 08:27:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1787646427; bh=q1CeSoNcgs38Q3ks16SHl984wd2aJ0/xEEdERGFkGXk=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=YVql98C3iFj+j81iqPO80IOq0EJ6YPHi+SHvaiNaCdYIT6dZ5pH6myguUT+HKTWH8 1PkdgZg+tqmhXxSCeuejuaARRITycE4g/qIT1C/kokOZRLcw83uh3ht90p9Q8TeVxz p80FHb387DSV0zfg8z8jIg9bg979Qf93dl4MfGKg= Date: Tue, 25 Aug 2026 10:27:01 +0200 From: Greg KH To: Jia Yao Cc: stable@vger.kernel.org, Gwan-gyeong Mun , Matthew Auld , Thomas =?iso-8859-1?Q?Hellstr=F6m?= Subject: Re: [PATCH 6.18.y 1/3] drm/xe/guc_ads: allocate UM queues in a separate BO Message-ID: <2026082510-monotone-denim-3d07@gregkh> References: <2026082036-afterglow-tapered-84a0@gregkh> <20260825034224.642641-1-jia.yao@intel.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260825034224.642641-1-jia.yao@intel.com> On Tue, Aug 25, 2026 at 03:42:22AM +0000, Jia Yao wrote: > Move the UM queues into a dedicated BO (ads->um_queue_bo) and avoid > CPU memset operations on it, which eliminates the CPU as a potential > cacheline-polluting agent and helps maintain consistency between GAM > writes and GuC reads. > > We also need to ensure the base_dpa for the queue is contiguous on hw > where this is used instead of a GGTT address. Another good reason to > split this out to a separate BO. > > Fixes: 9c57bc08652a ("drm/xe/lnl: Drop force_probe requirement") > Cc: Gwan-gyeong Mun > Cc: Matthew Auld > Cc: # v6.12+ > Signed-off-by: Jia Yao > Reviewed-by: Matthew Auld > Signed-off-by: Matthew Auld > Link: https://patch.msgid.link/20260804165057.129529-2-jia.yao@intel.com > (cherry picked from commit 6af05de0dc19bbf3aaeec2020fe48b37c834b811) This is not a valid git commit id anywhere that I can find :( confused, greg k-h