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 Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 73444C433F5 for ; Mon, 6 Dec 2021 11:56:35 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 19D4584B2D; Mon, 6 Dec 2021 11:56:35 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YgOoy0_UKeM7; Mon, 6 Dec 2021 11:56:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id E4D4983E58; Mon, 6 Dec 2021 11:56:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id C9853C002F; Mon, 6 Dec 2021 11:56:33 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 97C4EC0012 for ; Mon, 6 Dec 2021 11:56:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 7314A84B2D for ; Mon, 6 Dec 2021 11:56:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MVRWywrk4jyU for ; Mon, 6 Dec 2021 11:56:32 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by smtp1.osuosl.org (Postfix) with ESMTPS id DCA4083E58 for ; Mon, 6 Dec 2021 11:56:31 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 341393FC; Mon, 6 Dec 2021 12:56:28 +0100 (CET) Date: Mon, 6 Dec 2021 12:56:21 +0100 From: Joerg Roedel To: Yicong Yang Subject: Re: [PATCH v2 1/6] iommu: Export iommu_{get,put}_resv_regions() Message-ID: References: <20211116090625.53702-1-yangyicong@hisilicon.com> <20211116090625.53702-2-yangyicong@hisilicon.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211116090625.53702-2-yangyicong@hisilicon.com> Cc: mark.rutland@arm.com, prime.zeng@huawei.com, alexander.shishkin@linux.intel.com, linux-pci@vger.kernel.org, linuxarm@huawei.com, will@kernel.org, daniel.thompson@linaro.org, helgaas@kernel.org, liuqi115@huawei.com, mike.leach@linaro.org, suzuki.poulose@arm.com, coresight@lists.linaro.org, zhangshaokun@hisilicon.com, linux-arm-kernel@lists.infradead.org, mathieu.poirier@linaro.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, iommu@lists.linux-foundation.org, leo.yan@linaro.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Tue, Nov 16, 2021 at 05:06:20PM +0800, Yicong Yang wrote: > Export iommu_{get,put}_resv_regions() to the modules so that the driver > can retrieve and use the reserved regions of the device. Why should any driver bother? These functions are only used by the iommu core to call into iommu drivers to get information about needed direct mappings. Why drivers need this information belongs into this commit message. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu