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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 3E608C4360C for ; Sun, 6 Oct 2019 17:30:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 13B4C214D9 for ; Sun, 6 Oct 2019 17:30:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383056; bh=1gGCjJia8yEAWiHCMurLorhELpMT7PCKhoCa6fsupq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xY6pxsaRNqwa/z10019OWRJpHdmNiHhb6xOjo0skQe/b7Aq3h0P6mcrg+v7Ga086O Mg/RukTKYSPYWFQ9sGNdvunagexvotm6kGf8TWs46ZMQHpEL3114PfMlGK8GH9bAtd u4zkksxXQoxu/XvHTx5+K5YO6ol+kpc8gyjYSLHM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729325AbfJFRaz (ORCPT ); Sun, 6 Oct 2019 13:30:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:56842 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728047AbfJFRat (ORCPT ); Sun, 6 Oct 2019 13:30:49 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5AA5B2087E; Sun, 6 Oct 2019 17:30:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383048; bh=1gGCjJia8yEAWiHCMurLorhELpMT7PCKhoCa6fsupq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vwtrygrdJMWrCsfj24H6MIjKItxI8cwHBa4f3uZNWtt8YjwJ51xjJYpSuS2WNj2So hqtVa/Jf1sSNbm4uAjtv1ceg4VuQtWCvmLO/YtQcv4C7cIDyS1rZ0N2TbE1LExPfHQ zH66/mWgVPuIGWp4TTkb2gzrMLa3n1U95BtZR9JM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Rapoport , Russell King , Sasha Levin Subject: [PATCH 4.19 066/106] ARM: 8903/1: ensure that usable memory in bank 0 starts from a PMD-aligned address Date: Sun, 6 Oct 2019 19:21:12 +0200 Message-Id: <20191006171151.524099905@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171124.641144086@linuxfoundation.org> References: <20191006171124.641144086@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Rapoport [ Upstream commit 00d2ec1e6bd82c0538e6dd3e4a4040de93ba4fef ] The calculation of memblock_limit in adjust_lowmem_bounds() assumes that bank 0 starts from a PMD-aligned address. However, the beginning of the first bank may be NOMAP memory and the start of usable memory will be not aligned to PMD boundary. In such case the memblock_limit will be set to the end of the NOMAP region, which will prevent any memblock allocations. Mark the region between the end of the NOMAP area and the next PMD-aligned address as NOMAP as well, so that the usable memory will start at PMD-aligned address. Signed-off-by: Mike Rapoport Signed-off-by: Russell King Signed-off-by: Sasha Levin --- arch/arm/mm/mmu.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index e46a6a446cdd2..70e560cf8ca03 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1175,6 +1175,22 @@ void __init adjust_lowmem_bounds(void) */ vmalloc_limit = (u64)(uintptr_t)vmalloc_min - PAGE_OFFSET + PHYS_OFFSET; + /* + * The first usable region must be PMD aligned. Mark its start + * as MEMBLOCK_NOMAP if it isn't + */ + for_each_memblock(memory, reg) { + if (!memblock_is_nomap(reg)) { + if (!IS_ALIGNED(reg->base, PMD_SIZE)) { + phys_addr_t len; + + len = round_up(reg->base, PMD_SIZE) - reg->base; + memblock_mark_nomap(reg->base, len); + } + break; + } + } + for_each_memblock(memory, reg) { phys_addr_t block_start = reg->base; phys_addr_t block_end = reg->base + reg->size; -- 2.20.1