From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] drm/virtio: use virtio_max_dma_size
Date: Sat, 10 Aug 2019 01:22:00 -0700
Message-ID: <20190810082200.GC30426@infradead.org>
References: <20190808153445.27177-1-kraxel@redhat.com>
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, "open list:VIRTIO GPU DRIVER" <virtualization@lists.linux-foundation.org>, open list <linux-kernel@vger.kernel.org>
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On Thu, Aug 08, 2019 at 05:34:45PM +0200, Gerd Hoffmann wrote:
> We must make sure our scatterlist segments are not too big, otherwise
> we might see swiotlb failures (happens with sev, also reproducable with
> swiotlb=force).

Btw, any chance I could also draft you to replace the remaining
abuses of swiotlb_max_segment and swiotlb_nr_tbl in drm with proper
dma level interface?