From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH 1/3] swiotlb: Export maximum allocation size Date: Fri, 11 Jan 2019 10:12:31 +0100 Message-ID: <20190111091231.GB5825@8bytes.org> References: <20190110134433.15672-1-joro@8bytes.org> <20190110134433.15672-2-joro@8bytes.org> <20190110170205.GB27546@char.us.oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20190110170205.GB27546@char.us.oracle.com> Sender: linux-kernel-owner@vger.kernel.org To: Konrad Rzeszutek Wilk Cc: "Michael S . Tsirkin" , Jason Wang , Jens Axboe , virtualization@lists.linux-foundation.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jfehlig@suse.com, jon.grimm@amd.com, brijesh.singh@amd.com, hch@lst.de, Joerg Roedel List-Id: iommu@lists.linux-foundation.org On Thu, Jan 10, 2019 at 12:02:05PM -0500, Konrad Rzeszutek Wilk wrote: > Why not use swiotlb_nr_tbl ? That is how drivers/gpu/drm use to figure if they > need to limit the size of pages. That function just exports the overall size of the swiotlb aperture, no? What I need here is the maximum size for a single mapping. Regards, Joerg