From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.yourmailgateway.de (relay.yourmailgateway.de [188.68.63.98]) (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 21D2C3AE190 for ; Wed, 13 May 2026 06:50:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=188.68.63.98 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778655059; cv=none; b=sC7GN9fYIK9iXjZFido3bTL0VF8S4CMb+5mDzy3sPcLFh0Ph6Qhj48TKhdavD+Pz6uAOjkOk8VLBZdsgTRMZ6pCrNbUFu4OP93Uz3MzMX2PwociFIHNhSGTE2bfbL/MI7Im43ppN2mFfb9Khgv6nxUs+/c6Ob3txunGEwUF6VLY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778655059; c=relaxed/simple; bh=lTDwtGysRq7hkS0Y7aGitl6TT3RUqPXqifYMKOQ3eg4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q4+HrvRCoJoiR3whum/K7fNjrIsxmOwFHKjWVHtImnO6K2xVtbbIdkE/wR6O9zGf43f32cUe1xOh15SyS0LsEqMQxF5a1t2TisVI9AV5B3l+CRpPWPqtM2+7u/O+QDxmjXM1dUhZe7SL/Bjvx2cdx+0G12TyIz4uzcu0h7mpKOs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=leemhuis.info; spf=pass smtp.mailfrom=leemhuis.info; dkim=pass (2048-bit key) header.d=leemhuis.info header.i=@leemhuis.info header.b=XWNgHdNb; arc=none smtp.client-ip=188.68.63.98 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=leemhuis.info Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=leemhuis.info Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=leemhuis.info header.i=@leemhuis.info header.b="XWNgHdNb" Received: from mors-relay-2501.netcup.net (localhost [127.0.0.1]) by mors-relay-2501.netcup.net (Postfix) with ESMTPS id 4gFkcm1WMLz6DMP; Wed, 13 May 2026 08:50:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=leemhuis.info; s=key2; t=1778655048; bh=lTDwtGysRq7hkS0Y7aGitl6TT3RUqPXqifYMKOQ3eg4=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=XWNgHdNbT8uQ0+OXW1SrsQ362+PJ5nlh5PEa4oI+GD+BLJCo//74HA2pxSCRAjK6/ fo6RdQI7wEtpsinJfOB8Fq39BSgEPoJO1Qga2sk4C28o0splZk9Exq/f5bDrIhPZFF yV5h+4m/EGYqVzdeyViOXZJyx8NJlRmUIPTlDtuThthOpuEqdrS5Lxstdkenvzg1AY GmiU0Z4Pv8KqshRWvwMg0fPA0NRO58ipqbAvuFR0oVI07LZC4yhSjinb9jZjDe4+C5 d7eKjKGsNTUBbKsCRJRelQ7ySqkaB06aQ5fbxCaKA1nqTYQda3VfhHBVU8R064xp1L wmA6gkbsCpuMw== Received: from policy02-mors.netcup.net (unknown [46.38.225.35]) by mors-relay-2501.netcup.net (Postfix) with ESMTPS id 4gFkcm0kg6z4xvt; Wed, 13 May 2026 08:50:48 +0200 (CEST) Received: from mxe9fb.netcup.net (unknown [10.243.12.53]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by policy02-mors.netcup.net (Postfix) with ESMTPS id 4gFkcl300Hz8sch; Wed, 13 May 2026 08:50:47 +0200 (CEST) Received: from [IPV6:2a02:8108:8984:1d00:a0cf:1912:4be:477f] (unknown [IPv6:2a02:8108:8984:1d00:a0cf:1912:4be:477f]) by mxe9fb.netcup.net (Postfix) with ESMTPSA id 79E3B60305; Wed, 13 May 2026 08:50:46 +0200 (CEST) Authentication-Results: mxe9fb; spf=pass (sender IP is 2a02:8108:8984:1d00:a0cf:1912:4be:477f) smtp.mailfrom=regressions@leemhuis.info smtp.helo=[IPV6:2a02:8108:8984:1d00:a0cf:1912:4be:477f] Received-SPF: pass (mxe9fb: connection is authenticated) Message-ID: Date: Wed, 13 May 2026 08:50:45 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [REGRESSION] GPU passes into VM improperly after c376a3456d8b or a98db518dde2 To: 70sp <70sp@protonmail.com>, Baolu Lu Cc: "regressions@lists.linux.dev" , "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" References: <56ce85d5-e0b9-407c-9a86-708111a8a509@linux.intel.com> From: Thorsten Leemhuis Content-Language: de-DE, en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-PPP-Message-ID: <177865504675.1976311.7887495488887018125@mxe9fb.netcup.net> X-Rspamd-Server: rspamd-worker-8404 X-Rspamd-Queue-Id: 79E3B60305 X-NC-CID: OC9jNeE25qOyWQ8qzWOwPFA2h/g5tnaGARNRJA+duQgKG9F5xG8= On 4/29/26 22:30, 70sp wrote: > So I have tested it on both a working kernel (v6.12) and an affected kernel (mainline). > > I managed to get the domain translation structures on the affected kernel, but couldn't get them on the working one since reading the file always ended up in a system crash or a segmentation fault. > > I also couldn't get the PASID table entries, because the GPU doesn't support PASID. > > Domain translation structures: > GPU: https://pastebin.com/4EY5Wmsj > GPU audio device: https://pastebin.com/fLf7weii > > I've also looked through dmesg on both configurations, and on the affected kernel, this was the only data I found to have atleast something different. (On the working kernel basically nothing was reported) > > Referenced snippet of dmesg: https://pastebin.com/5e3jQ2BL Lo! Baolu, just wondering: what happened to this? It seems things stalled. Or was there any progress to fix the regression that I missed? Or do you need more data from 70sp? Ciao, Thorsten