From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
David Tolnay <dtolnay@gmail.com>, Peter Huewe <peterhuewe@gmx.de>,
linux-integrity@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
virtualization@lists.linux-foundation.org, dgreid@chromium.org,
apronin@chromium.org
Subject: Re: [PATCH] tpm: Add driver for TPM over virtio
Date: Fri, 22 Feb 2019 23:59:23 +0200 [thread overview]
Message-ID: <20190222215923.GB21427@linux.intel.com> (raw)
In-Reply-To: <20190222213137.GZ17500@ziepe.ca>
On Fri, Feb 22, 2019 at 02:31:37PM -0700, Jason Gunthorpe wrote:
> On Fri, Feb 22, 2019 at 04:16:01PM -0500, Michael S. Tsirkin wrote:
> > On Fri, Feb 22, 2019 at 07:30:16AM -0800, James Bottomley wrote:
> > > On Thu, 2019-02-21 at 18:14 -0800, David Tolnay wrote:
> > > > Add a config TCG_VIRTIO_VTPM which enables a driver providing the
> > > > guest kernel side of TPM over virtio.
> > >
> > > What's the use case for using this over the current non-virtio vTPM?.
> > > I always thought virtio was about guest to host transport efficiency,
> > > but the phsical TPM, being connected over a very slow bus, is about as
> > > inefficient as you can get in that regard, so why do we need to use
> > > virtio to drive the virtual one?
> >
> > I can't say for sure about TPM.
> >
> > But generally there are many reasons to do virtio rather than emulating
> > a hardware device.
>
> We already have a xen 'virtioish' TPM driver, so I don't think there
> is a good reason to block a virtio driver if someone cares about
> it. There are enough good reasons to prefer virtio to other options,
> IMHO.
>
> Provided it meets the general requirements for new virtio stuff you
> outlined.
Yeah, absolutely we can consider this.
For me it boils down to testing and documentation part.
No plans to merge code that I'm unable to run...
/Jarkko
next prev parent reply other threads:[~2019-02-22 21:59 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 2:14 [PATCH] tpm: Add driver for TPM over virtio David Tolnay
2019-02-22 5:51 ` Michael S. Tsirkin
2019-02-22 21:40 ` David Tolnay
2019-02-22 22:24 ` Michael S. Tsirkin
2019-02-23 1:23 ` David Tolnay
2019-02-25 9:58 ` Jarkko Sakkinen
2019-02-22 10:26 ` Jarkko Sakkinen
2019-02-22 15:23 ` Michael S. Tsirkin
2019-02-22 19:31 ` Jarkko Sakkinen
2019-02-22 19:33 ` Jarkko Sakkinen
2019-02-22 21:25 ` Michael S. Tsirkin
2019-02-22 21:50 ` Jarkko Sakkinen
2019-02-22 22:24 ` David Tolnay
2019-02-22 22:36 ` Jarkko Sakkinen
2019-02-22 23:05 ` Michael S. Tsirkin
2019-02-24 9:33 ` Jarkko Sakkinen
2019-02-22 20:55 ` Michael S. Tsirkin
2019-02-22 21:30 ` Jarkko Sakkinen
2019-02-22 10:30 ` Jarkko Sakkinen
2019-02-22 15:30 ` James Bottomley
2019-02-22 21:16 ` Michael S. Tsirkin
2019-02-22 21:31 ` Jason Gunthorpe
2019-02-22 21:59 ` Jarkko Sakkinen [this message]
2019-02-22 22:07 ` Michael S. Tsirkin
2019-02-22 22:14 ` Jarkko Sakkinen
2019-02-22 22:00 ` David Tolnay
2019-02-22 22:18 ` James Bottomley
2019-02-23 0:45 ` David Tolnay
2019-02-23 1:34 ` James Bottomley
2019-02-23 2:41 ` David Tolnay
2019-02-24 16:30 ` James Bottomley
2019-02-24 17:51 ` Jarkko Sakkinen
2019-02-24 22:12 ` David Tolnay
2019-02-25 9:55 ` Jarkko Sakkinen
2019-02-25 15:36 ` James Bottomley
2019-02-25 19:17 ` Matthew Garrett
2019-02-25 19:54 ` Jarkko Sakkinen
2019-02-25 20:20 ` James Bottomley
2019-02-25 21:00 ` Matthew Garrett
2019-02-25 21:02 ` Matthew Garrett
2019-02-25 22:14 ` James Bottomley
2019-02-25 22:24 ` Matthew Garrett
2019-02-25 22:32 ` James Bottomley
2019-02-25 22:43 ` Matthew Garrett
2019-02-25 22:51 ` James Bottomley
2019-02-25 23:02 ` Matthew Garrett
2019-02-25 23:09 ` James Bottomley
2019-02-25 21:05 ` Jarkko Sakkinen
2019-02-25 22:24 ` James Bottomley
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