From: "Michael S. Tsirkin" <mst@redhat.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: jgross@suse.com, Peng Fan <peng.fan@nxp.com>,
konrad.wilk@oracle.com, jasowang@redhat.com, x86@kernel.org,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Christoph Hellwig <hch@infradead.org>,
iommu@lists.linux-foundation.org, linux-imx@nxp.com,
xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] xen: introduce xen_vring_use_dma
Date: Wed, 1 Jul 2020 17:23:32 -0400 [thread overview]
Message-ID: <20200701172219-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <alpine.DEB.2.21.2007011020320.8121@sstabellini-ThinkPad-T480s>
On Wed, Jul 01, 2020 at 10:34:53AM -0700, Stefano Stabellini wrote:
> Would you be in favor of a more flexible check along the lines of the
> one proposed in the patch that started this thread:
>
> if (xen_vring_use_dma())
> return true;
>
>
> xen_vring_use_dma would be implemented so that it returns true when
> xen_swiotlb is required and false otherwise.
Just to stress - with a patch like this virtio can *still* use DMA API
if PLATFORM_ACCESS is set. So if DMA API is broken on some platforms
as you seem to be saying, you guys should fix it before doing something
like this..
--
MST
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-07-01 21:23 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 9:17 [PATCH] xen: introduce xen_vring_use_dma Peng Fan
2020-06-24 9:06 ` Michael S. Tsirkin
2020-06-24 17:59 ` Stefano Stabellini
2020-06-24 20:47 ` Michael S. Tsirkin
2020-06-24 21:53 ` Stefano Stabellini
2020-06-24 22:16 ` Michael S. Tsirkin
2020-06-25 17:31 ` Stefano Stabellini
2020-06-26 15:32 ` Michael S. Tsirkin
2020-06-29 3:05 ` Peng Fan
2020-06-29 6:21 ` Michael S. Tsirkin
2020-06-29 6:25 ` Peng Fan
2020-06-29 6:33 ` Michael S. Tsirkin
2020-06-29 6:35 ` Peng Fan
2020-06-29 23:49 ` Stefano Stabellini
2020-06-30 1:40 ` Peng Fan
2020-06-29 23:46 ` Stefano Stabellini
2020-07-01 13:34 ` Christoph Hellwig
2020-07-01 17:34 ` Stefano Stabellini
2020-07-01 20:47 ` Michael S. Tsirkin
2020-07-01 21:23 ` Michael S. Tsirkin [this message]
2020-07-10 17:23 ` Stefano Stabellini
2020-07-11 18:44 ` Michael S. Tsirkin
2020-07-15 17:06 ` Stefano Stabellini
2020-07-13 1:53 ` Peng Fan
2020-06-29 3:00 ` Peng Fan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200701172219-mutt-send-email-mst@kernel.org \
--to=mst@redhat.com \
--cc=boris.ostrovsky@oracle.com \
--cc=hch@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jasowang@redhat.com \
--cc=jgross@suse.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peng.fan@nxp.com \
--cc=sstabellini@kernel.org \
--cc=virtualization@lists.linux-foundation.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).