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Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifie
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices... |
Date: |
Fri, 13 Jul 2018 00:00:19 +0300 |
On Thu, Jul 12, 2018 at 01:52:53PM -0700, Siwei Liu wrote:
> The definition is incomplete due to lack of spec. There's no "host"
> part defined yet in the host-guest interface. If match by MAC is an
> interface, the same must be done on the host(device) side as well,
> which has been agreed not the way to go. However, I don't think that's
> what the author intends to do by interpreting his QEMU patch - it
> missed the other parts as well, such as the feature negotiation and
> how it interacts with the paired device.
>
> What I said is that match by MAC is just a guest implementation that
> one can change at any time. We now have the group ID on QEMU, why
> still sticking to matching by MAC? It shoulnd't be a host-guest
> interface in the first place anyway.
I think that match by MAC is a simple portable way to match devices.
E.g. it will work seamlessly with niche things like zPCI. However
there are other niche use-cases that aren't addressed by match by MAC
such as PF pass-through as a primary, and the pci bridge trick addresses
that at cost of some portability.
So I see no issues supporting both mechanisms, but others on the TC
might feel differently.
--
MST
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., (continued)
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., si-wei liu, 2018/07/03
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Roman Kagan, 2018/07/09
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/09
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., si-wei liu, 2018/07/09
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/09
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Siwei Liu, 2018/07/10
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Cornelia Huck, 2018/07/11
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Siwei Liu, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Cornelia Huck, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Siwei Liu, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices...,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Siwei Liu, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Samudrala, Sridhar, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/12
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Cornelia Huck, 2018/07/13
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/12
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/09
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Siwei Liu, 2018/07/10
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/09
- Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/04
Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices..., Michael S. Tsirkin, 2018/07/09