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Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings
From: |
David Gibson |
Subject: |
Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings |
Date: |
Wed, 24 Aug 2011 19:33:00 +1000 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Aug 24, 2011 at 11:14:26AM +0200, Roedel, Joerg wrote:
> On Tue, Aug 23, 2011 at 12:54:27PM -0400, aafabbri wrote:
> > On 8/23/11 4:04 AM, "Joerg Roedel" <address@hidden> wrote:
> > > That is makes uiommu basically the same as the meta-groups, right?
> >
> > Yes, functionality seems the same, thus my suggestion to keep uiommu
> > explicit. Is there some need for group-groups besides defining sets of
> > groups which share IOMMU resources?
> >
> > I do all this stuff (bringing up sets of devices which may share IOMMU
> > domain) dynamically from C applications. I don't really want some static
> > (boot-time or sysfs fiddling) supergroup config unless there is a good
> > reason KVM/power needs it.
> >
> > As you say in your next email, doing it all from ioctls is very easy,
> > programmatically.
>
> I don't see a reason to make this meta-grouping static. It would harm
> flexibility on x86. I think it makes things easier on power but there
> are options on that platform to get the dynamic solution too.
I think several people are misreading what Ben means by "static". I
would prefer to say 'persistent', in that the meta-groups lifetime is
not tied to an fd, but they can be freely created, altered and removed
during runtime.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, (continued)
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/25
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/25
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/30
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, aafabbri, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/24
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings,
David Gibson <=
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/24
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, David Gibson, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alexander Graf, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alexander Graf, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Aaron Fabbri, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Chris Wright, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Aaron Fabbri, 2011/08/26
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Chris Wright, 2011/08/26