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=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 9B586C4360C for ; Sun, 6 Oct 2019 17:28:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74E7521479 for ; Sun, 6 Oct 2019 17:28:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382881; bh=1gGCjJia8yEAWiHCMurLorhELpMT7PCKhoCa6fsupq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OlzZRHVN/H1ldqetDFbAoipTWPxgXMpaYMnu42E5aNZ7tj/J1k10XZuz7uDlwYphR cR/CtrIJhn3zQHAPn5ASnvmqkXI+Lw7T6WjLkFfxs5Yq9awX3Km1LkSJqwMmgvvgtt Hhxa4vhHEW1PWY30uAODnwoJj2yiW3D7+E9gucKo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728640AbfJFR2A (ORCPT ); Sun, 6 Oct 2019 13:28:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:53438 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728607AbfJFR1x (ORCPT ); Sun, 6 Oct 2019 13:27:53 -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 D6FE6214D9; Sun, 6 Oct 2019 17:27:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382873; bh=1gGCjJia8yEAWiHCMurLorhELpMT7PCKhoCa6fsupq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f6gGuDP/efo5zbuVQgurbB5S0cX0bhQjT7zDYN9qHyLCSFrAxOYMOCBE/ZrbPFKkU HrQjwlroIovquCvh/m1TQQgRy6ejDyK9bB8Yc10yKbakAzTGROF3kgGvGxW+4oBTaq if9aUlUNViHmtttUQ+x4N/jIvsMymEJDcNINLpww= 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 4.14 41/68] ARM: 8903/1: ensure that usable memory in bank 0 starts from a PMD-aligned address Date: Sun, 6 Oct 2019 19:21:17 +0200 Message-Id: <20191006171127.366967464@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171108.150129403@linuxfoundation.org> References: <20191006171108.150129403@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