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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 BCE83C47080 for ; Mon, 31 May 2021 10:00:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 75EC8610E7 for ; Mon, 31 May 2021 10:00:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75EC8610E7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wMLT1n3qOsTcJulREM9erGAl5yH57P8hFgjyeTeGlXU=; b=E2oGyTxy7qX409 WQ0srrC5z4+NIdigmZgBPW7o0gDecQp1Gvx9dBwc1aJt4QGsCRzGcYKpA6dv88CCQRF2Szf4fD14Q hlGrdJyyTAnEBRM929KfzK8pwz4NX/u8XkzIsqrSQVxP7MC1I5UsepXxfgES3DiIhScQGuEKAsI8D C3nKmRF6peiuI998WOmu8LElWd3psNS34I4+hkVOKp6fTNBw3gP59+cgiJ5Ah9rck9Z5l3hTyIRvr wK5Ib3XigBxD86c2WzqAwCPkhAD/fSTB2Tuqc9oI1o4cUxunrctlmXDQJASSSbHoi+Lw3ZHxyCQMP qtoVEn7RcFjtW4gu0iLA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lnehH-00BkmI-1H; Mon, 31 May 2021 09:58:59 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lnegN-00BkR0-My; Mon, 31 May 2021 09:58:05 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7304861220; Mon, 31 May 2021 09:58:03 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1lnegL-004Z7v-MZ; Mon, 31 May 2021 10:58:01 +0100 From: Marc Zyngier To: kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Ard Biesheuvel , Mark Rutland , James Morse , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Eric Biederman , Bhupesh SHARMA , AKASHI Takahiro , Dave Young , Andrew Morton , Moritz Fischer , kernel-team@android.com Subject: [PATCH v2 4/5] kernel/resource: Introduce walk_system_ram_excluding_child_res() Date: Mon, 31 May 2021 10:57:19 +0100 Message-Id: <20210531095720.77469-5-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210531095720.77469-1-maz@kernel.org> References: <20210531095720.77469-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, ardb@kernel.org, mark.rutland@arm.com, james.morse@arm.com, lorenzo.pieralisi@arm.com, guohanjun@huawei.com, sudeep.holla@arm.com, ebiederm@xmission.com, bhupesh.sharma@linaro.org, takahiro.akashi@linaro.org, dyoung@redhat.com, akpm@linux-foundation.org, mdf@kernel.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210531_025803_839889_5D268707 X-CRM114-Status: GOOD ( 13.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Introduce a new helper called walk_system_ram_excluding_child_res(), which does the same job as walk_system_ram_res() but excludes overlapping child resources. Again, nobody is interested in such a filtering, so no functional change is expected. Acked-by: Catalin Marinas Reviewed-by: Ard Biesheuvel Signed-off-by: Marc Zyngier --- include/linux/ioport.h | 3 +++ kernel/resource.c | 15 +++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 8359c50f9988..f9638d085349 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -320,6 +320,9 @@ extern int walk_system_ram_res(u64 start, u64 end, void *arg, int (*func)(struct resource *, void *)); extern int +walk_system_ram_excluding_child_res(u64 start, u64 end, void *arg, + int (*func)(struct resource *, void *)); +extern int walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end, void *arg, int (*func)(struct resource *, void *)); diff --git a/kernel/resource.c b/kernel/resource.c index 0e4d2ca763cd..92b765eaba58 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -492,6 +492,21 @@ int walk_system_ram_res(u64 start, u64 end, void *arg, false, arg, func); } +/* + * This function calls the @func callback against all memory ranges of type + * System RAM which are marked as IORESOURCE_SYSTEM_RAM and IORESOUCE_BUSY, + * excluding RAM ranges that have overlapping child resources. + * Same constraints as @walk_system_ram_res apply. + */ +int walk_system_ram_excluding_child_res(u64 start, u64 end, void *arg, + int (*func)(struct resource *, void *)) +{ + unsigned long flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; + + return __walk_iomem_res_desc(start, end, flags, IORES_DESC_NONE, + true, arg, func); +} + /* * This function calls the @func callback against all memory ranges, which * are ranges marked as IORESOURCE_MEM and IORESOUCE_BUSY. -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel