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, 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 91A4CC63798 for ; Mon, 23 Nov 2020 02:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D61B208B8 for ; Mon, 23 Nov 2020 02:29:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727193AbgKWC3Z (ORCPT ); Sun, 22 Nov 2020 21:29:25 -0500 Received: from foss.arm.com ([217.140.110.172]:51996 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727092AbgKWC3Z (ORCPT ); Sun, 22 Nov 2020 21:29:25 -0500 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 79A60106F; Sun, 22 Nov 2020 18:29:24 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.82.200]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6532A3F70D; Sun, 22 Nov 2020 18:29:21 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org, david@redhat.com Cc: Anshuman Khandual , Heiko Carstens , Vasily Gorbik , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 3/3] s390/mm: Define arch_get_addressable_range() Date: Mon, 23 Nov 2020 07:58:49 +0530 Message-Id: <1606098529-7907-4-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606098529-7907-1-git-send-email-anshuman.khandual@arm.com> References: <1606098529-7907-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This overrides arch_get_addressable_range() on s390 platform and drops now redudant similar check in vmem_add_mapping(). Cc: Heiko Carstens Cc: Vasily Gorbik Cc: David Hildenbrand Cc: linux-s390@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/s390/include/asm/mmu.h | 2 ++ arch/s390/mm/vmem.c | 16 ++++++++++++---- 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index e12ff0f29d1a..f92d3926b188 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -55,4 +55,6 @@ static inline int tprot(unsigned long addr) return rc; } +#define arch_get_addressable_range arch_get_addressable_range +struct range arch_get_addressable_range(bool need_mapping); #endif diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index b239f2ba93b0..e03ad0ed13a7 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -532,14 +532,22 @@ void vmem_remove_mapping(unsigned long start, unsigned long size) mutex_unlock(&vmem_mutex); } +struct range arch_get_addressable_range(bool need_mapping) +{ + struct range memhp_range; + + memhp_range.start = 0; + if (need_mapping) + memhp_range.end = VMEM_MAX_PHYS; + else + memhp_range.end = (1ULL << (MAX_PHYSMEM_BITS + 1)) - 1; + return memhp_range; +} + int vmem_add_mapping(unsigned long start, unsigned long size) { int ret; - if (start + size > VMEM_MAX_PHYS || - start + size < start) - return -ERANGE; - mutex_lock(&vmem_mutex); ret = vmem_add_range(start, size); if (ret) -- 2.20.1