Re: [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Fri, Sep 22, 2023 at 4:16 AM Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> On Thu, Sep 21, 2023 at 04:53:45PM -0300, Jason Gunthorpe wrote:
> > On Thu, Sep 21, 2023 at 03:34:03PM -0400, Michael S. Tsirkin wrote:
> >
> > > that's easy/practical.  If instead VDPA gives the same speed with just
> > > shadow vq then keeping this hack in vfio seems like less of a problem.
> > > Finally if VDPA is faster then maybe you will reconsider using it ;)
> >
> > It is not all about the speed.
> >
> > VDPA presents another large and complex software stack in the
> > hypervisor that can be eliminated by simply using VFIO.
> If all you want is passing through your card to guest
> then yes this can be addressed "by simply using VFIO".


And what's more, using MMIO BAR0 then it can work for legacy.

I have a handy virtio hardware from one vendor that works like this,
and I see it is done by a lot of other vendors.


Virtualization mailing list

[Index of Archives]     [KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux