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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2C2D9C433F5 for ; Mon, 6 Dec 2021 11:58:04 +0000 (UTC) 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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=mKUa/xbR2EmMOSFZMn58wWTCAZtyhuSjqrftqVqVAjk=; b=PqymJKlhJHfjuo nsBLcaUeuJezc5PMQY0DS8y2XQmyEvtbu/AqIffx3/h/oV0Xv4CykwHu3Yz7fb3jjf6jTggsX5Ac7 KfZl4gW7/j6MIx5bLgNU2DipbglPE1szERgPaeY04q5tm02MxXs3HUAFqrGRx1oqELn8R2iu0HQbo uUojW0EHild9+wPaxyl35OeQliSsa1/G/HulBkbj3fnnBuQjCf+JLfFplX0NfCE0vh0FcgklwYqcv hKBz0DoFmzjfWCB7y4h2W2t8X/4+2mUa/RB2WL6hUyiScHPXt+IKnoleMuynABvbY8XM2QNTX8r+Q HYFtsVOcao57bfQJcuEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1muCbj-003e2U-A9; Mon, 06 Dec 2021 11:56:35 +0000 Received: from 8bytes.org ([81.169.241.247] helo=theia.8bytes.org) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1muCbf-003e0b-Ld for linux-arm-kernel@lists.infradead.org; Mon, 06 Dec 2021 11:56:32 +0000 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 Cc: gregkh@linuxfoundation.org, helgaas@kernel.org, alexander.shishkin@linux.intel.com, lorenzo.pieralisi@arm.com, will@kernel.org, mark.rutland@arm.com, mathieu.poirier@linaro.org, suzuki.poulose@arm.com, mike.leach@linaro.org, leo.yan@linaro.org, jonathan.cameron@huawei.com, daniel.thompson@linaro.org, john.garry@huawei.com, shameerali.kolothum.thodi@huawei.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, linux-pci@vger.kernel.org, linux-perf-users@vger.kernel.org, iommu@lists.linux-foundation.org, prime.zeng@huawei.com, liuqi115@huawei.com, zhangshaokun@hisilicon.com, linuxarm@huawei.com, song.bao.hua@hisilicon.com 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211206_035631_894263_DCC35988 X-CRM114-Status: UNSURE ( 8.78 ) X-CRM114-Notice: Please train this message. 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 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel