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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 AEF2EC43603 for ; Thu, 19 Dec 2019 18:59:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77C54227BF for ; Thu, 19 Dec 2019 18:59:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576781950; bh=cV8BtaBdwTKnozME35vtYwxR3ObGSo3brVmHIXTUxiY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yxjNI2Y6Dg2OTFmxn4ahUa15uBxvkMkmty4qOa6QlIPwLA8snLOLPmR23pRLL4k1O b11g8s4fHXdKjS90jfSrt080lgXm3tEM5JUd9HRGa4pBmhbkI1XvZ3HIvLQYU7vX6k gJBfcEhTF2qFc8onNC/esLiyKtnik1ZTMZlCBQsk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730358AbfLSS7J (ORCPT ); Thu, 19 Dec 2019 13:59:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:49134 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729339AbfLSSxu (ORCPT ); Thu, 19 Dec 2019 13:53:50 -0500 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 23DC520674; Thu, 19 Dec 2019 18:53:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576781629; bh=cV8BtaBdwTKnozME35vtYwxR3ObGSo3brVmHIXTUxiY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0ievnbt7fnlbToY4noqcNkATIKltdZvAgGOQh5/tblOYvOh5J5QF5PEBC4ftNz5mq kXbY3VK5SFjPXn9X9YrQyt/9as2KEYrBQ+EkZkWOrc+UHahcsGUa7QUggAXeXPttDK V8OSxMvSobJSq/gYaK97odUgF/biGC2U5ugAMszs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Rapoport , Max Filippov Subject: [PATCH 5.4 16/80] xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map Date: Thu, 19 Dec 2019 19:34:08 +0100 Message-Id: <20191219183053.711885287@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191219183031.278083125@linuxfoundation.org> References: <20191219183031.278083125@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: Max Filippov commit e64681b487c897ec871465083bf0874087d47b66 upstream. KASAN shadow map doesn't need to be accessible through the linear kernel mapping, allocate its pages with MEMBLOCK_ALLOC_ANYWHERE so that high memory can be used. This frees up to ~100MB of low memory on xtensa configurations with KASAN and high memory. Cc: stable@vger.kernel.org # v5.1+ Fixes: f240ec09bb8a ("memblock: replace memblock_alloc_base(ANYWHERE) with memblock_phys_alloc") Reviewed-by: Mike Rapoport Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman --- arch/xtensa/mm/kasan_init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -56,7 +56,9 @@ static void __init populate(void *start, for (k = 0; k < PTRS_PER_PTE; ++k, ++j) { phys_addr_t phys = - memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE); + memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE, + 0, + MEMBLOCK_ALLOC_ANYWHERE); if (!phys) panic("Failed to allocate page table page\n");