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 C10F9C4361B for ; Thu, 17 Dec 2020 15:30:18 +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 79B4A2396F for ; Thu, 17 Dec 2020 15:30:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 79B4A2396F 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=389Qxntw+BJ/RYOU6kQVNZNMp42XoyTwoVAPAEBdykA=; b=xGYp20VjVTh/NN1PVA4BewQTAZ lKFSVi2L/pEuQs/YHBnR83Y1y9gu8JYs4P4ggd78MN41qsPeKgFvEaW23JthCEwWusie5IgEb5HfR +Yet7H5mC5jV8I0oMp+p+W8k/n8CCy9+VxAwkL1RxrKMg2i/liaAZpecOuDEg2oVQCdRt9a3fhY3w 4573V8vA7u7Durgc9zt/MZ7d3glYkrz/trFL2rsmJ0QNF02C4sY1wmI8YPm1zjddhETbNXK3ou6+j ml11tNFpBfBtTZU2tPvXiKqhMMyiTPuxvVEi/iazOg1l12IMjkzkWThwS1wAGgSO6HfHqIwEcX3RE uPN+NTeA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kpvDC-0002T6-1t; Thu, 17 Dec 2020 15:29:02 +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 1kpvD4-0002Qv-H6 for linux-arm-kernel@lists.infradead.org; Thu, 17 Dec 2020 15:28:56 +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 F1967106F; Thu, 17 Dec 2020 07:28:52 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.84.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 293A63F66B; Thu, 17 Dec 2020 07:28:48 -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 V2 3/3] s390/mm: Define arch_get_mappable_range() Date: Thu, 17 Dec 2020 20:58:32 +0530 Message-Id: <1608218912-28932-4-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1608218912-28932-1-git-send-email-anshuman.khandual@arm.com> References: <1608218912-28932-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201217_102854_699334_E4A3ACDD X-CRM114-Status: GOOD ( 16.05 ) 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_mappabble_range() on s390 platform which will be used with recently added generic framework. It modifies the existing range check in vmem_add_mapping() using arch_get_mappable_range(). It also adds a VM_BUG_ON() check that would ensure that memhp_range_allowed() has already been called on the hotplug path. Cc: Heiko Carstens Cc: Vasily Gorbik Cc: David Hildenbrand Cc: linux-s390@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Heiko Carstens Signed-off-by: Anshuman Khandual --- arch/s390/mm/init.c | 1 + arch/s390/mm/vmem.c | 15 ++++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 77767850d0d0..e0e78234ae57 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -291,6 +291,7 @@ int arch_add_memory(int nid, u64 start, u64 size, if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot)) return -EINVAL; + VM_BUG_ON(!memhp_range_allowed(start, size, 1)); rc = vmem_add_mapping(start, size); if (rc) return rc; diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index b239f2ba93b0..e10e563ad2b4 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -4,6 +4,7 @@ * Author(s): Heiko Carstens */ +#include #include #include #include @@ -532,11 +533,23 @@ void vmem_remove_mapping(unsigned long start, unsigned long size) mutex_unlock(&vmem_mutex); } +struct range arch_get_mappable_range(void) +{ + struct range memhp_range; + + memhp_range.start = 0; + memhp_range.end = VMEM_MAX_PHYS; + return memhp_range; +} + int vmem_add_mapping(unsigned long start, unsigned long size) { + struct range range; int ret; - if (start + size > VMEM_MAX_PHYS || + range = arch_get_mappable_range(); + if (start < range.start || + start + size > range.end || start + size < start) return -ERANGE; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel