[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings
From: |
Joerg Roedel |
Subject: |
Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings |
Date: |
Tue, 30 Aug 2011 18:13:43 +0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Fri, Aug 26, 2011 at 12:04:22PM -0600, Alex Williamson wrote:
> On Thu, 2011-08-25 at 20:05 +0200, Joerg Roedel wrote:
> > If we really expect segment numbers that need the full 16 bit then this
> > would be the way to go. Otherwise I would prefer returning the group-id
> > directly and partition the group-id space for the error values (s32 with
> > negative numbers being errors).
>
> It's unlikely to have segments using the top bit, but it would be broken
> for an iommu driver to define it's group numbers using pci s:b:d.f if we
> don't have that bit available. Ben/David, do PEs have an identifier of
> a convenient size? I'd guess any hardware based identifier is going to
> use a full unsigned bit width.
Okay, if we want to go the secure way I am fine with the "int *group"
parameter. Another option is to just return u64 and use the extended
number space for errors. But that is even worse as an interface, I
think.
Joerg
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, (continued)
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Aaron Fabbri, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/24
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/24
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/25
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Don Dutile, 2011/08/25
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/25
- 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 <=
- 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, 2011/08/24
- 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