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Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communic
From: |
Amit Shah |
Subject: |
Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication |
Date: |
Thu, 6 Aug 2009 16:05:53 +0530 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On (Wed) Aug 05 2009 [18:57:13], Jamie Lokier wrote:
> Anthony Liguori wrote:
> > Richard W.M. Jones wrote:
> > Have you considered using a usb serial device? Something attractive
> > about it is that a productid/vendorid can be specified which means that
> > you can use that as a method of enumerating devices.
> >
> > Hot add/remove is supported automagically.
>
> The same applies to PCI: productid/vendorid (and subids);
> PCI hotplug is possible though not as native as USB.
>
> Here's another idea: Many devices these days have a serial number or
> id string. E.g. USB storage, ATA drives, media cards, etc. Linux
> these days creates alias device nodes which include the id string in
> the device name. E.g. /dev/disks/by-id/ata-FUJITSU_MHV2100BH_NWAQT662615H
>
> So in addition to (or instead of) /dev/vmch0, /dev/vmch1 etc.,
> Linux guests could easily generate:
>
> /dev/vmchannel/by-role/clipboard-0
> /dev/vmchannel/by-role/gueststats-0
> /dev/vmchannel/by-role/vmmanager-0
That's interesting; worth a thought. When we actually have all the
parties together (libvirt, libguestfs, qemu) to decide which ports need
to act as which transports, we'll be able to add this.
> It's not necessary to do this at the beginning. All that is needed is
> to provide enough id information that will appear in /sys/..., so that
> that a udev policy for naming devices can be created at some later date.
True.
Amit
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, (continued)
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Rusty Russell, 2009/08/25
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Gerd Hoffmann, 2009/08/25
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Anthony Liguori, 2009/08/10
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Rusty Russell, 2009/08/10
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Anthony Liguori, 2009/08/10
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Anthony Liguori, 2009/08/10
- Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Gerd Hoffmann, 2009/08/10
Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication,
Amit Shah <=
Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Richard W.M. Jones, 2009/08/05
Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication, Jamie Lokier, 2009/08/05