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Subject: Re: [virtio-dev] Re: [virtio-comment] [PATCH v3 1/1] virtio-ism: introduce new device virtio-ism
On Wed, 5 Apr 2023 08:52:14 -0400, "Michael S. Tsirkin" <mst@redhat.com> wrote: > On Wed, Apr 05, 2023 at 02:39:53PM +0200, Alexandra Winter wrote: > > > > > > On 24.03.23 05:03, Wen Gu wrote: > > > > > > > > > On 2023/3/23 22:46, Halil Pasic wrote: > > > > > >> On Thu, 9 Feb 2023 11:30:56 +0800 > > >> Xuan Zhuo <xuanzhuo@linux.alibaba.com> wrote: > > >> > > > > ... > > > > > > > >> To get back to the things proposed here: the cdid is IMHO > > >> a nice thing, and is functionally corresponding to the > > >> (S)EID. But it is 16 byte wide, and I have no idea how > > >> is it supposed to be used in the CLC handshake. > > >> > > > > > > CLC handshake carry one SEID for all the SMC-D device. Considering > > > coexistence with ISM, I am not sure whether we can change or increase > > > the SEID.. cc Alexandra > > > > > > Thanks! > > > Wen Gu > > > > As mentioned by others, discussions are ongoing. > > It would be great, if we can agree on a way to use the existing CLC handshake > > for SMC-D via virtio-ism and ism-loopback. > > In that case SEID needs to be unique per hardware instance, cannot be increased and > > can only be changed for x86 in a non-colliding way. > > > > An alternative would be to define new a SMC-D(?) protocol variant/version, where we > > are free to define new fields (e.g. UUIDs). > > > > Alexandra > > Problem with tying to hardware is that it is blocking > migration (which is a challenge with ism anyway, but still). We don't want to support migration. At least we don't want to support it for the time being. Because there are indeed many problems. I think Migration is not necessary for a new Virtio device. Thanks. > > > > > > > >> If this is really supposed to work with SMC and not just take > > >> inspiration from it, I would like some insight from our > > >> SMC experts (they are already on copy). > > >> > > >> Regards, > > >> Halil > > >> > > >> --------------------------------------------------------------------- > > >> To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org > > >> For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org > For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org >
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