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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 67570C18E5A for ; Mon, 9 Mar 2020 08:22:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D40E2084E for ; Mon, 9 Mar 2020 08:22:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="m/giYsQO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726567AbgCIIWs (ORCPT ); Mon, 9 Mar 2020 04:22:48 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:38977 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbgCIIWp (ORCPT ); Mon, 9 Mar 2020 04:22:45 -0400 Received: by mail-pf1-f194.google.com with SMTP id w65so3946083pfb.6 for ; Mon, 09 Mar 2020 01:22:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dOfAoLdk+wyu9cMPPwg3ptCFXLjHocYAW+86LT+5msM=; b=m/giYsQOqBKciJBZcJMXG3pJIU8PzNA/YNo1CXykqc3wPCLwBGH6k2idh+ZXn05yE4 yRciCQY9RJloiOJwvlJMD6Kq7e+lTftgYDsLY45GGla2EpqtQL2xThwzrXP3vaw8T+E8 ilhj8Ef/PETZkQnyDqHqgB7VKnhRYu6xwv9b3C2p5CDCMq5HajGUi00OKf1AsAEfiZGx WYDOZvYQcT6HFoUIpoD6fqGE6b4LCfgg0ktM8Z5TGwjKJL7SFv72j+SYEIXpQyQ8AKGL c6C5c1caGCYFf+wV6+XQyLSB0/yPpD89KnvgSTyv4jILmkZwMyql4ahKfoLtPpNotbmr c1DQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dOfAoLdk+wyu9cMPPwg3ptCFXLjHocYAW+86LT+5msM=; b=mBTJh54esFQXRrd7SIIawTwX//tD8OOf6MSgcmdsBcb3SvmzgNcval+IzVfgL93V6o +uC3LCeh/HfewgiKUNKOMMOBzboL+eIHxz1hKuKq4VjUtNB7DrP6gqEzJBJkC8eui5sb +qtNCjGFIEisvPz3CNz2F1uBXHiRIpeEVYvzmpvuZKKIzt+aIAalAz9ObvWntuREajAj qrHhg+LsyH6eWhzhlrZALAT38TOvP8Y0/yYmto0TouBs/HVnv3rzFeiJhUWPUOuPmG3e kj47KnWAlZqGi8itNbsECkNSaD+kXrYfWt54j975SMTCA8dRJ5dPViID+G6yCqQm5u2X LoJw== X-Gm-Message-State: ANhLgQ3d2jshx8g3AoDeCqMSI/w856jxzmDv7QCHxZL+9ojFi49JhNQY eUlGMJ8HQWKggnYJI4E5xiKEAg== X-Google-Smtp-Source: ADFU+vteMe3ewvhpJQl/NECjXwkfEf/awPln9cYkogZavclnc7ufmZRdrvr43bRED8C+ximaAcRKkg== X-Received: by 2002:aa7:9e8b:: with SMTP id p11mr15205017pfq.26.1583742163604; Mon, 09 Mar 2020 01:22:43 -0700 (PDT) Received: from hsinchu02.internal.sifive.com (220-132-236-182.HINET-IP.hinet.net. [220.132.236.182]) by smtp.gmail.com with ESMTPSA id v5sm18364779pfn.64.2020.03.09.01.22.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2020 01:22:43 -0700 (PDT) From: Zong Li To: palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Zong Li Subject: [PATCH v2 3/9] riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support Date: Mon, 9 Mar 2020 16:22:23 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ARCH_SUPPORTS_DEBUG_PAGEALLOC provides a hook to map and unmap pages for debugging purposes. Implement the __kernel_map_pages functions to fill the poison pattern. Signed-off-by: Zong Li --- arch/riscv/Kconfig | 3 +++ arch/riscv/mm/pageattr.c | 13 +++++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 07bf1a7c0dd2..f524d7e60648 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -132,6 +132,9 @@ config ARCH_SELECT_MEMORY_MODEL config ARCH_WANT_GENERAL_HUGETLB def_bool y +config ARCH_SUPPORTS_DEBUG_PAGEALLOC + def_bool y + config SYS_SUPPORTS_HUGETLBFS def_bool y diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 7be6cd67e2ef..728759eb530a 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -172,3 +172,16 @@ int set_direct_map_default_noflush(struct page *page) return walk_page_range(&init_mm, start, end, &pageattr_ops, &masks); } + +void __kernel_map_pages(struct page *page, int numpages, int enable) +{ + if (!debug_pagealloc_enabled()) + return; + + if (enable) + __set_memory((unsigned long)page_address(page), numpages, + __pgprot(_PAGE_PRESENT), __pgprot(0)); + else + __set_memory((unsigned long)page_address(page), numpages, + __pgprot(0), __pgprot(_PAGE_PRESENT)); +} -- 2.25.1