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=-16.8 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 8450AC4361B for ; Tue, 8 Dec 2020 04:18:24 +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 2EC9C239EB for ; Tue, 8 Dec 2020 04:18:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2EC9C239EB 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=g37CH6z/gvkWmZvbzclja4Bz3/sLLBEBNZURVMBE/wM=; b=DbO/T3fUAfr71xlWFSnTSJwQoL 61zxVGaft66nZ0owSpfX/v8Hz8c5cVqwNg1j7ZsaeV1Wj1fBsyRQSgnnYe8aKIxhJG9rElGBGf1MW OOkdU8QiSIRvyW5dDwvxV/strvUCOG/u3UPMYtfV0GT0vYJD/nrgnlS+/o8g7PPm/aFnCXLP0nUIl WB35/q63P8+/W/UgF85w6MXI9tvTVmJ9+utlM5Dfs79C0qAOifPPShy2IHMMcs+0gH8l8J9WsBUqP u2mYKDWsJSHmmef9r+nrBjlG6SA6r07zU9Eps39XNd9x6Ggv1SvmcQBMNk75Y3VK9RSJc/+iLXHvH R641MmZg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmURC-00009e-Vd; Tue, 08 Dec 2020 04:17:19 +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 1kmUR5-00007R-Um for linux-arm-kernel@lists.infradead.org; Tue, 08 Dec 2020 04:17:13 +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 57155D6E; Mon, 7 Dec 2020 20:17:10 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.87.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B2B673F718; Mon, 7 Dec 2020 20:17:05 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org, david@redhat.com, hca@linux.ibm.com, catalin.marinas@arm.com Subject: [PATCH 2/3] arm64/mm: Define arch_get_mappable_range() Date: Tue, 8 Dec 2020 09:46:17 +0530 Message-Id: <1607400978-31595-3-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1607400978-31595-1-git-send-email-anshuman.khandual@arm.com> References: <1607400978-31595-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201207_231712_078835_F62CDA0C X-CRM114-Status: GOOD ( 14.37 ) 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 memhp_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 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 ca692a815731..54705dcacb4e 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1444,16 +1444,19 @@ 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 memhp_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); + memhp_range.start = __pa(_PAGE_OFFSET(vabits_actual)); + memhp_range.end = __pa(PAGE_END - 1); + return memhp_range; } int arch_add_memory(int nid, u64 start, u64 size, @@ -1461,11 +1464,7 @@ 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(!memhp_range_allowed(start, size, 1)); 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