From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4D03028F4 for ; Fri, 9 May 2025 06:37:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746772666; cv=none; b=iR0ISlfxnhzGs4ojaIPnpDaSMqvgjGfNA4gGfD6PRAZEaRct9vnq0RBlkWyoKwJ1T3wdokX/10pSVNs1+4h2ggJYx+SLcyDI0xY6kE0nC5obMEk+95WkJ2mSftoTKe6/K/wm0uhFdouRxs3wp5zuOS7kASm3RhdCwNZTAMYpqhU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746772666; c=relaxed/simple; bh=dQ/uJPqSHryC/jX10/p5XMijmEo7PL5OSa0J4w7KrII=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cASYKkTq1ZecEuKGBpMgP3ncz5gWDnN5SfzzpUPoMlARWYHYwoCBxnO8sjZMnB3vp5bVCOUZYyaMUkRxWK8OLKWKMG+peQIEShg+BBiVq9pCJa+2HjkFBmrhbj22WBrm0VS8ElMoOomA3t1l5CeafsLcgo2ph/erRGIcgCZFeOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O7jNSbhD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O7jNSbhD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77DC5C4CEE4; Fri, 9 May 2025 06:37:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746772665; bh=dQ/uJPqSHryC/jX10/p5XMijmEo7PL5OSa0J4w7KrII=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=O7jNSbhDOOIvuFlC+5KEUPDKQnpQkfNWo9JLbXUTgNX0/Trui6O9eQQH6qMCyXOcp KMuUWVTyDXi3dXsTDS7ZSgZkhXvPXLmwWZw4G0pZuNUUqfQkRVz3DNN67IrVyGejek h7uTn+UebLQMJQpa9ZhkrdtFkRbtDUl2Iw8OlPDexaUcPw9SuAWHI4+beJsgFlqUM8 1CYSYFGE9E6jFjY10q54AC6SUIfMxih7C/oNMfpib2YRP0bMdERwTjq+94hgyUJ60l XFs7zCZbkTuPdpINs38KQyUk5xHn6rp33xsg67UkbY2/baOl5cf1w9dY/s+ZEm94N4 ny6f2rz0LVcGw== Date: Fri, 9 May 2025 08:37:41 +0200 From: Ingo Molnar To: Vignesh Raman Cc: dmukhin@ford.com, mingo@redhat.com, andriy.shevchenko@linux.intel.com, x86@kernel.org, daniels , Daniel Stone , robdclark , lumag@kernel.org, linux-kernel Subject: Re: x86: Boot failure on select chromebooks with v6.15-rc5 Message-ID: References: Precedence: bulk X-Mailing-List: linux-kernel@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: * Vignesh Raman wrote: > > What boot cmdline does your kernel have? The MMIO-UART patches should > > only have an effect if the feature is specifically enabled via a boot > > option: > > > > + if (!strncmp(buf, "mmio32", 6)) { > > + buf += 6; > > + early_mmio_serial_init(buf); > > + early_console_register(&early_serial_console, keep); > > + buf += 4; > > + } > > > > amdgpu:stoney: > earlyprintk=uart8250,mmio32,0xfedc6000,115200n8 console=ttyS0,115200n8 > root=/dev/nfs rw nfsroot=192.168.201.1:/var/lib/lava/dispatcher/tmp/18598802/extract-nfsrootfs-wgn1xjer,tcp,hard,v3 > init=/init rootwait usbcore.quirks=0bda:8153:k ip=dhcp > tftpserverip=192.168.201.1 > > i915:amly: > earlyprintk=uart8250,mmio32,0xde000000,115200n8 console=ttyS0,115200n8 > root=/dev/nfs rw nfsroot=192.168.201.1:/var/lib/lava/dispatcher/tmp/18598804/extract-nfsrootfs-5rlm_b6z,tcp,hard,v3 > init=/init rootwait usbcore.quirks=0bda:8153:k ip=dhcp > tftpserverip=192.168.201.1 > > i915:whl: > earlyprintk=uart8250,mmio32,0xde000000,115200n8 console=ttyS0,115200n8 > root=/dev/nfs rw nfsroot=192.168.201.1:/var/lib/lava/dispatcher/tmp/18598833/extract-nfsrootfs-3w0w5_mi,tcp,hard,v3 > init=/init rootwait usbcore.quirks=0bda:8153:k ip=dhcp > tftpserverip=192.168.201.1 Well, if you remove the earlyprintk option then it will boot fine, right? The earlyprintk=mmio32 in v6.15 is a new debugging feature that was tested on a single board by Denis Mukhin AFAIK, and it may or may not work on your particular UART - even assuming that all the parameters are correct. Thanks, Ingo