From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 232C922D9EF for ; Fri, 9 May 2025 05:56:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746770173; cv=none; b=du8bSswT9scOcEicnKMAH7wb35T8EQHylW1ODSEaGya834KY+gbSDGcqizL7bmQmTJdsWF+8YtaCi770/eeaD4ztHfYpzJ2leEXxhYSXqnXujAc7Jc0wbafqg9TBxAn4+8lelDSd4m8/SHgQ+xfNX6VuOAmCzGJO/GeQ5kwwyeI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746770173; c=relaxed/simple; bh=9Zprc0Y8fd00gD3Cwnj8oJhsjRG7Bjkmu4tpcaZJ4HU=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=Zsu3UMZxCbnqFcrPb+D1rOOlysOyLTOCa0Dl50EsR+l39WpIYpIp339F6eyjPLorcTEgY9Kh40vX9siDRgyWPbDWuWpg45/KRryL1FUc39gkGh0M0UhOrT+Irts/o8x3apxkPJZtKrrEZTAF9G/jPKGqqJXDqGdX59xHKCDcs7M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=lte/5JpA; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="lte/5JpA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1746770168; bh=9Zprc0Y8fd00gD3Cwnj8oJhsjRG7Bjkmu4tpcaZJ4HU=; h=Date:To:Cc:From:Subject:From; b=lte/5JpAIPoIfwdWCRBIHV4wDSGRmTYY1DVQdB2Y8K74IzEZuChluAckTxW1nyOMu 9oeLaEfHAu0W/vMPIPTIL4YYJj8+/qCjqZ5Zg3g8TbQGVXzuwLd+aEiN6jGUiTRa6T N7kjyiIVCRZF2RmBdGIKPvyf9rxeT4uQvo+mxaewWHrtjVyl82NxNHCoZjIDiJuD27 Xd9tv7CnwNbuETVwWTFg8+0TpGsJCgve1CxgI1VXCCi0E2v5FWW4KfB9we+3pz5azO 1QztPZ3HN+aleoQqIK/C1dJFBeQh3TICuz0aaglZdloHCfMijHbaaewaKIai2w+Fj3 5b1bs063SEc2A== Received: from [192.168.50.250] (unknown [171.76.80.110]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: vignesh) by bali.collaboradmins.com (Postfix) with ESMTPSA id C972E17E05A6; Fri, 9 May 2025 07:56:05 +0200 (CEST) Message-ID: Date: Fri, 9 May 2025 11:26:01 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: dmukhin@ford.com, mingo@kernel.org, mingo@redhat.com, andriy.shevchenko@linux.intel.com, x86@kernel.org Cc: daniels , Daniel Stone , robdclark , lumag@kernel.org, linux-kernel From: Vignesh Raman Subject: x86: Boot failure on select chromebooks with v6.15-rc5 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, With v6.15-rc5, the below chromebooks were not booting with the following message. These tests were run in drm-ci. Starting kernel ... [ 1.843801] ? __pfx_kernel_init+0x10/0x10 [ 1.909838] ? __pfx_kernel_init+0x10/0x10 https://gitlab.freedesktop.org/vigneshraman/linux/-/pipelines/1420485 Failing jobs: amdgpu:stoney (AMD Stoney Ridge chipset): https://gitlab.freedesktop.org/vigneshraman/linux/-/jobs/76000926 i915:amly (64 bit Intel Whiskey Lake): https://gitlab.freedesktop.org/vigneshraman/linux/-/jobs/76000929 i915:whl (64 bit Intel Amber Lake): https://gitlab.freedesktop.org/vigneshraman/linux/-/jobs/76000931 These tests were passing till v6.14-rc7, and the issue was seen starting in v6.15-rc1. This issue is seen only with these 3 boards and does not affect other chromebooks (the pipeline log shows the other i915 driver tests). On bisecting the commits, the commit which introduced this issue is, 3181424aeac2f6596534bf43021a10eae294a9b0 x86/early_printk: Add support for MMIO-based UARTs After reverting the below commits in v6.15-rc5, the board boots and tests are executed: 3181424aeac2 x86/early_printk: Add support for MMIO-based UARTs 996457176bb7 x86/early_printk: Use 'mmio32' for consistency, fix comments (this fixes 3181424aeac2) pipeline after reverting the commits, https://gitlab.freedesktop.org/vigneshraman/linux/-/pipelines/1420493 Please could you look into this issue. Thank you. Regards, Vignesh