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=-8.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 05AC3C00A89 for ; Fri, 30 Oct 2020 18:02:11 +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 7B62720725 for ; Fri, 30 Oct 2020 18:02:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VBA65EkE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B62720725 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:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=EHP63oefy4ccIHIFethzXyeG2zTEgUlLIo5J6St/Dnc=; b=VBA65EkEv4uOqX7nHW1dDZX5o MRY6bEP1SBmNh0vxXa7L351+7gW+SgoB6fJ92dpstp2IqrWidfrUfChQQ5lLxLs3C7f9TamhyM/Lo mk4HGT9ZViX6hN+Dt6JkUqa7+7sca7dy37ZoHCfNpIcAqpxaNTfXLhDj1zVAaSJ/5RU4Lgtrn1FKk BKg+FxswLl/3CUFslXq7xI/jxC2p5Vur04WkTW/Gb1pzKAL5coOHKWQLoHzRW3PmBSV2lJyk3Kpgn q0XSR3hGy6xjcjxTrpFXrDnvGznPXcx0oA3yBFrjk6NzlDnYztHU7Wz4U8jblq3Pv+JMO7cim16zM BDxpNr7nw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYYie-0005j9-1m; Fri, 30 Oct 2020 18:01:44 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYYi4-0005Vu-VE; Fri, 30 Oct 2020 18:01:10 +0000 Received: from gaia (unknown [95.145.162.19]) (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 178E320A8B; Fri, 30 Oct 2020 18:01:01 +0000 (UTC) Date: Fri, 30 Oct 2020 18:00:55 +0000 From: Catalin Marinas To: Nicolas Saenz Julienne Subject: Re: [PATCH v5 6/7] arm64: mm: Set ZONE_DMA size based on early IORT scan Message-ID: <20201030180055.GD23196@gaia> References: <20201029172550.3523-1-nsaenzjulienne@suse.de> <20201029172550.3523-7-nsaenzjulienne@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201029172550.3523-7-nsaenzjulienne@suse.de> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201030_140109_187605_41223680 X-CRM114-Status: GOOD ( 15.74 ) 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: devicetree@vger.kernel.org, Lorenzo Pieralisi , Anshuman Khandual , will@kernel.org, Sudeep Holla , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, jeremy.linton@arm.com, ardb@kernel.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, robh+dt@kernel.org, linux-rpi-kernel@lists.infradead.org, Hanjun Guo , robin.murphy@arm.com, hch@lst.de, linux-arm-kernel@lists.infradead.org, Len Brown 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 On Thu, Oct 29, 2020 at 06:25:49PM +0100, Nicolas Saenz Julienne wrote: > diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c > index 9929ff50c0c0..05fe4a076bab 100644 > --- a/drivers/acpi/arm64/iort.c > +++ b/drivers/acpi/arm64/iort.c > @@ -1718,3 +1718,55 @@ void __init acpi_iort_init(void) > > iort_init_platform_devices(); > } > + > +#ifdef CONFIG_ZONE_DMA > +/* > + * Check the IORT whether any devices exist whose DMA mask is < 32 bits. > + * If so, return the smallest value encountered, or 32 otherwise. > + */ > +unsigned int __init acpi_iort_get_zone_dma_size(void) > +{ > + struct acpi_table_iort *iort; > + struct acpi_iort_node *node, *end; > + acpi_status status; > + u8 limit = 32; Nitpick: can we not return PHYS_ADDR_MAX here, for consistency with of_dma_get_max_cpu_address()? There wouldn't be any functional change. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel