[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host b
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges |
Date: |
Tue, 22 May 2018 15:47:41 -0600 |
On Wed, 23 May 2018 00:44:22 +0300
"Michael S. Tsirkin" <address@hidden> wrote:
> On Tue, May 22, 2018 at 03:36:59PM -0600, Alex Williamson wrote:
> > On Tue, 22 May 2018 23:58:30 +0300
> > "Michael S. Tsirkin" <address@hidden> wrote:
> > >
> > > It's not hard to think of a use-case where >256 devices
> > > are helpful, for example a nested virt scenario where
> > > each device is passed on to a different nested guest.
> > >
> > > But I think the main feature this is needed for is numa modeling.
> > > Guests seem to assume a numa node per PCI root, ergo we need more PCI
> > > roots.
> >
> > But even if we have NUMA affinity per PCI host bridge, a PCI host
> > bridge does not necessarily imply a new PCIe domain.
>
> What are you calling a PCIe domain?
Domain/segment
0000:00:00.0
^^^^ This
Isn't that the only reason we'd need a new MCFG section and the reason
we're limited to 256 buses? Thanks,
Alex
- [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, (continued)
- [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Zihan Yang, 2018/05/20
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Marcel Apfelbaum, 2018/05/21
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Laszlo Ersek, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Marcel Apfelbaum, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Laszlo Ersek, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Alex Williamson, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges,
Alex Williamson <=
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Laszlo Ersek, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Alex Williamson, 2018/05/23
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/23
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Alex Williamson, 2018/05/23
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/23
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Marcel Apfelbaum, 2018/05/23
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Alex Williamson, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Michael S. Tsirkin, 2018/05/22
- Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges, Laszlo Ersek, 2018/05/22