From patchwork Wed Apr 3 04:30:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 10882777 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0C6861708 for ; Wed, 3 Apr 2019 04:30:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E4C8828613 for ; Wed, 3 Apr 2019 04:30:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8E9D28913; Wed, 3 Apr 2019 04:30:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8093728613 for ; Wed, 3 Apr 2019 04:30:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=j3zMz9S5F96bpqkBctjpliHcMqFBAdgoH1TbIpUoZtw=; b=WCtSw+B59znxX+ooCIM03JR68x N+qb51VywHMkUMugBqNbGdRm4mhpjqf0Gg9OTPP8tr+Vr91ejGoyJpw0tGHxBowBf/HnZ0onDFkFt 3CIgNiF+RTWWF2HWovFLTGNT8tP3HGV7M4tRDCh49emLdlFmcpfn1ihjqOyDFcpxZ9/3mwUdT1b+7 /gkIM+wOSV1qhLBca8oqVh7daWhLsOi0RCE/s8dw8PHnNGDbi1kWdoqu9ygES1KedyXo1P4JFhzfI DjNxcUyjMjdjwZE7b4/zg3QRiOYT9SoR4qjIJkagO5O53lQSqhkWFOMQLBTVluOxEAak/7OpHlUWZ xlBOxHKg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBXXd-0003fE-HD; Wed, 03 Apr 2019 04:30:25 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBXXW-0003WP-6t for linux-arm-kernel@lists.infradead.org; Wed, 03 Apr 2019 04:30:20 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 13D5F15AD; Tue, 2 Apr 2019 21:30:18 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.1.97]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B6BCE3F721; Tue, 2 Apr 2019 21:30:12 -0700 (PDT) From: Anshuman Khandual To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, akpm@linux-foundation.org, will.deacon@arm.com, catalin.marinas@arm.com Subject: [PATCH 1/6] arm64/mm: Enable sysfs based memory hot add interface Date: Wed, 3 Apr 2019 10:00:01 +0530 Message-Id: <1554265806-11501-2-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1554265806-11501-1-git-send-email-anshuman.khandual@arm.com> References: <1554265806-11501-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190402_213018_374768_B2E759F8 X-CRM114-Status: UNSURE ( 9.21 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, mhocko@suse.com, david@redhat.com, robin.murphy@arm.com, cai@lca.pw, pasha.tatashin@oracle.com, logang@deltatee.com, james.morse@arm.com, cpandya@codeaurora.org, arunks@codeaurora.org, dan.j.williams@intel.com, mgorman@techsingularity.net, osalvador@suse.de MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Sysfs memory probe interface (/sys/devices/system/memory/probe) can accept starting physical address of an entire memory block to be hot added into the kernel. This is in addition to the existing ACPI based interface. This just enables it with the required config CONFIG_ARCH_MEMORY_PROBE. Signed-off-by: Anshuman Khandual --- arch/arm64/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 7e34b9e..a2418fb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -266,6 +266,15 @@ config HAVE_GENERIC_GUP config ARCH_ENABLE_MEMORY_HOTPLUG def_bool y +config ARCH_MEMORY_PROBE + bool "Enable /sys/devices/system/memory/probe interface" + depends on MEMORY_HOTPLUG + help + This option enables a sysfs /sys/devices/system/memory/probe + interface for testing. See Documentation/memory-hotplug.txt + for more information. If you are unsure how to answer this + question, answer N. + config SMP def_bool y