From patchwork Tue Mar 24 10:40:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 1260566 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=default header.b=i3lRfVJi; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48mp4L1WVNz9sSH for ; Tue, 24 Mar 2020 21:52:50 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727063AbgCXKwt (ORCPT ); Tue, 24 Mar 2020 06:52:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:32926 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726818AbgCXKwt (ORCPT ); Tue, 24 Mar 2020 06:52:49 -0400 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B519920786; Tue, 24 Mar 2020 10:52:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585047169; bh=+iibOFkBWKJV8Q+pH/D981jndLEWtZUGhcDEhF4SEfU=; h=From:To:Cc:Subject:Date:From; b=i3lRfVJixvsC2NTSGynPfxWXY8m+3bQnIf5uTNtSbJmfxK5h2sz+Xnwpga0Rg3R2A eIl5Ga37mBa9/65lWCLuq26P7ckL8eNCoAaee1vQy47hifYJfnrG8/qXpJsiUJvulx eztwd5HCZEcU60PLffQBGNf9Fg7gcPXCCoELyD1I= From: Will Deacon To: linux-kernel@vger.kernel.org Cc: kernel-team@android.com, Will Deacon , "David S. Miller" , Peter Zijlstra , Nick Desaulniers , Matt Fleming , sparclinux@vger.kernel.org Subject: [PATCH 0/4] Rework sparc32 page-table layout Date: Tue, 24 Mar 2020 10:40:01 +0000 Message-Id: <20200324104005.11279-1-will@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org Hi folks, This series of patches reworks the sparc32 page-table layout so that 'pmd_t' no longer embeds an array of 16 physical pointers, which means that we can finally enforce atomicity for accesses made using READ_ONCE(): https://lkml.kernel.org/r/20200123153341.19947-1-will@kernel.org I've tested this with QEMU by booting Debian Etch. Please take a look! Cheers, Will Cc: "David S. Miller" Cc: Peter Zijlstra Cc: Nick Desaulniers Cc: Matt Fleming Cc: sparclinux@vger.kernel.org --->8 Will Deacon (4): sparc32: mm: Fix argument checking in __srmmu_get_nocache() sparc32: mm: Restructure sparc32 MMU page-table layout sparc32: mm: Change pgtable_t type to pte_t * instead of struct page * sparc32: mm: Reduce allocation size for PMD and PTE tables arch/sparc/include/asm/page_32.h | 12 ++-- arch/sparc/include/asm/pgalloc_32.h | 11 ++-- arch/sparc/include/asm/pgtable_32.h | 40 +++++++----- arch/sparc/include/asm/pgtsrmmu.h | 36 +---------- arch/sparc/include/asm/viking.h | 5 +- arch/sparc/kernel/head_32.S | 8 +-- arch/sparc/mm/hypersparc.S | 3 +- arch/sparc/mm/srmmu.c | 95 ++++++++++------------------- arch/sparc/mm/viking.S | 5 +- 9 files changed, 85 insertions(+), 130 deletions(-)