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[Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon |
Date: |
Mon, 7 Dec 2009 16:43:14 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Mon, Dec 07, 2009 at 03:30:09PM +0100, Gerd Hoffmann wrote:
> On 12/07/09 15:13, Michael S. Tsirkin wrote:
>> Gerd, any idea whether "one MSI-X vector" feature is worth pursuing?
>
> I'd rate it low priority. First because virtio-enabled guests can use
> virtio-net+blk. Also because with the upcoming p35 support we'll get a
> more modern pc emulation including a ioapic with all 24 IRQ lines being
> wired up, which will help reducing IRQ sharing too.
>
> MSI support (no -X) could be more intresting (for emulated devices) as
> it is older and thus support is more common. My T60 for example has no
> device with MSI-X support but 9 with MSI support. Linux turns on MSI
> for 7 of them (4 PCIe ports, e1000, ahci, iwl3945).
>
> cheers,
> Gerd
Yes, but what matters is guest support I think.
On windows it seems that both msix and msi support
were added simulataneously.
It won't be hard to add MSI support, but let's determine
when is it needed.
--
MST
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon,
Michael S. Tsirkin <=