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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 F0303C433DB for ; Mon, 1 Feb 2021 03:26:34 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id ACB6F64DBD for ; Mon, 1 Feb 2021 03:26:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACB6F64DBD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/KV4wCicmBYxcqURQ19uSx+Ae3rR5ixwjK8gLQ4n59Q=; b=iTFmzIDjxYx7Y1HBp7XArKdAtx 83Z7ruG+dDi0+xlhiH4/HlzVfVC/YGghlhh0gDjgUpjpUBcn4VnLBRvJZc7+R/wfuoTIrAz6E/qwy z786WONsjXwbbq+7JrBVxocslS+YzStbzpf0RqJmbj/mp51HZWe0LzZxdw3ND6IzrBrhL01XhgVsO n/01Spj3+5iTE9JFyKRZ6gJhZp/Cn2zsjFtW+Zsm4h7zAJ1wuGQJiU/G80An4mNqcp1MGuTXoy0e1 cY++w6zl7lzY7FyXFsxqfsl1dGa6xmBChA7lRnXPzb/nhzJtX/n7cEJ797Aimo8KCdSkOoHo/R2rC iCJHxjQg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l6Ppu-0001En-Jz; Mon, 01 Feb 2021 03:25:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l6Pph-0001BJ-F8 for linux-arm-kernel@lists.infradead.org; Mon, 01 Feb 2021 03:24:59 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CB78C113E; Sun, 31 Jan 2021 19:24:51 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.93.126]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7521E3F66E; Sun, 31 Jan 2021 19:24:47 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org, hca@linux.ibm.com, catalin.marinas@arm.com, david@redhat.com, osalvador@suse.de Subject: [PATCH V5 2/4] arm64/mm: Define arch_get_mappable_range() Date: Mon, 1 Feb 2021 08:55:00 +0530 Message-Id: <1612149902-7867-3-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1612149902-7867-1-git-send-email-anshuman.khandual@arm.com> References: <1612149902-7867-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210131_222457_906460_A52784C6 X-CRM114-Status: GOOD ( 13.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , linux-s390@vger.kernel.org, Vasily Gorbik , Anshuman Khandual , linux-kernel@vger.kernel.org, Will Deacon , Ard Biesheuvel , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This overrides arch_get_mappable_range() on arm64 platform which will be used with recently added generic framework. It drops inside_linear_region() and subsequent check in arch_add_memory() which are no longer required. It also adds a VM_BUG_ON() check that would ensure that mhp_range_allowed() has already been called. Cc: Catalin Marinas Cc: Will Deacon Cc: Ard Biesheuvel Cc: Mark Rutland Cc: David Hildenbrand Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: David Hildenbrand Signed-off-by: Anshuman Khandual --- arch/arm64/mm/mmu.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index ae0c3d023824..b14fd1b6b1a0 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1442,16 +1442,19 @@ static void __remove_pgd_mapping(pgd_t *pgdir, unsigned long start, u64 size) free_empty_tables(start, end, PAGE_OFFSET, PAGE_END); } -static bool inside_linear_region(u64 start, u64 size) +struct range arch_get_mappable_range(void) { + struct range mhp_range; + /* * Linear mapping region is the range [PAGE_OFFSET..(PAGE_END - 1)] * accommodating both its ends but excluding PAGE_END. Max physical * range which can be mapped inside this linear mapping range, must * also be derived from its end points. */ - return start >= __pa(_PAGE_OFFSET(vabits_actual)) && - (start + size - 1) <= __pa(PAGE_END - 1); + mhp_range.start = __pa(_PAGE_OFFSET(vabits_actual)); + mhp_range.end = __pa(PAGE_END - 1); + return mhp_range; } int arch_add_memory(int nid, u64 start, u64 size, @@ -1459,11 +1462,7 @@ int arch_add_memory(int nid, u64 start, u64 size, { int ret, flags = 0; - if (!inside_linear_region(start, size)) { - pr_err("[%llx %llx] is outside linear mapping region\n", start, start + size); - return -EINVAL; - } - + VM_BUG_ON(!mhp_range_allowed(start, size, true)); if (rodata_full || debug_pagealloc_enabled()) flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel