From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FF60C43215 for ; Mon, 25 Nov 2019 16:36:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 026A42068E for ; Mon, 25 Nov 2019 16:36:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=xenosoft.de header.i=@xenosoft.de header.b="QmZmTCTG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 026A42068E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xenosoft.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4E1256B05D5; Mon, 25 Nov 2019 11:36:34 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 491996B05D7; Mon, 25 Nov 2019 11:36:34 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3A7216B05D9; Mon, 25 Nov 2019 11:36:34 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0207.hostedemail.com [216.40.44.207]) by kanga.kvack.org (Postfix) with ESMTP id 262346B05D5 for ; Mon, 25 Nov 2019 11:36:34 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id DE51B181AEF2A for ; Mon, 25 Nov 2019 16:36:33 +0000 (UTC) X-FDA: 76195353066.30.train63_735fc9340a708 X-HE-Tag: train63_735fc9340a708 X-Filterd-Recvd-Size: 4322 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [81.169.146.171]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Mon, 25 Nov 2019 16:36:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1574699791; s=strato-dkim-0002; d=xenosoft.de; h=In-Reply-To:Date:Message-ID:From:References:Cc:To:Subject: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=7k/spbSE4Wnjsqc+UF1NKqt47ly0JC/Mr6Ef3iOR2Sc=; b=QmZmTCTGd6uXkaiioUx3vhtDc2UZ01KUm2V4PNRmMJZZ9EvajnaYKq9q+BfT3Jx3Vn lYa1dleu+6aqroRdYHVJproom4pOB0vEssCA//dq6tKqc1lJ/2X4D1rp53gN6uqgt4Pq clph7Y9dLcXKk8bwAzaN/Cam3iZ+Xa7P2p99Y1yvvAPV2zxZLG+RtlPHSP1lc94EiajZ ZuzFo5HPRg/01JqDEmNjK4cjn72bneX9TYtMe4Mz5Ynv5HUH7Lkmv41lnvudkssmt3vL ed31A1PWkaO9wOMfnrC/bTtuhP+e8fbsKi1H53qmv2VDvsoln6PSi4ulKeOwuu2K1uSR goYg== X-RZG-AUTH: ":L2QefEenb+UdBJSdRCXu93KJ1bmSGnhMdmOod1DhGM4l4Hio94KKxRySfLxnHfJ+Dkjp5DdBJSrwuuqxvPhXJixqXRlXNgnQNtnHeat+VHo=" X-RZG-CLASS-ID: mo00 Received: from [IPv6:2a02:8109:89c0:ebfc:40cb:202:5c2:453d] by smtp.strato.de (RZmta 45.0.2 AUTH) with ESMTPSA id x0678cvAPGaH2b4 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Mon, 25 Nov 2019 17:36:17 +0100 (CET) Subject: Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M To: Christoph Hellwig Cc: Robin Murphy , linux-arch@vger.kernel.org, darren@stevens-zone.net, mad skateman , Benjamin Herrenschmidt , linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rob Herring , paulus@samba.org, rtd2@xtra.co.nz, "contact@a-eon.com" , linuxppc-dev , nsaenzjulienne@suse.de, Mike Rapoport References: <20191121072943.GA24024@lst.de> <6eec5c42-019c-a988-fc2a-cb804194683d@xenosoft.de> <20191121180226.GA3852@lst.de> <2fde79cf-875f-94e6-4a1b-f73ebb2e2c32@xenosoft.de> <20191125073923.GA30168@lst.de> From: Christian Zigotzky Message-ID: <96537365-8dbf-7f7e-f37f-14bf5c144b45@xenosoft.de> Date: Mon, 25 Nov 2019 17:36:17 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20191125073923.GA30168@lst.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: de-DE X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 25 November 2019 at 08:39 am, Christoph Hellwig wrote: > On Sat, Nov 23, 2019 at 12:42:27PM +0100, Christian Zigotzky wrote: >> Hello Christoph, >> >> Please find attached the dmesg of your Git kernel. > Thanks. It looks like on your platform the swiotlb buffer isn't > actually addressable based on the bus dma mask limit, which is rather > interesting. swiotlb_init uses memblock_alloc_low to allocate the > buffer, and I'll need some help from Mike and the powerpc maintainers > to figure out how that select where to allocate the buffer from, and > how we can move it to a lower address. My gut feeling would be to try > to do what arm64 does and define a new ARCH_LOW_ADDRESS_LIMIT, preferably > without needing too much arch specific magic. > > As a quick hack can you try this patch on top of the tree from Friday? > > diff --git a/include/linux/memblock.h b/include/linux/memblock.h > index f491690d54c6..e3f95c362922 100644 > --- a/include/linux/memblock.h > +++ b/include/linux/memblock.h > @@ -344,7 +344,7 @@ static inline int memblock_get_region_node(const struct memblock_region *r) > #define MEMBLOCK_LOW_LIMIT 0 > > #ifndef ARCH_LOW_ADDRESS_LIMIT > -#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL > +#define ARCH_LOW_ADDRESS_LIMIT 0x0fffffffUL > #endif > > phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align, > Hello Christoph, Thanks a lot for your help! I will test your patch tomorrow. Cheers, Christian