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Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the de
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device |
Date: |
Mon, 22 Nov 2010 09:37:07 +0200 |
On Sun, Nov 21, 2010 at 10:39:31PM +0200, Michael S. Tsirkin wrote:
> On Sun, Nov 21, 2010 at 09:29:59PM +0200, Gleb Natapov wrote:
> > > We can control the bus numbers that the BIOS will assign to pci root.
> > And if you need to insert device that sits behind pci-to-pci bridge? Do
> > you want to control that bus address too? And bus number do not
> > unambiguously
> > describe pci root since two roots can have same bus number just fine.
>
> They have to have different segment numbers.
>
AKA PCI domains AKA one more number assigned by a guest.
> > > It's probably required to make them stable anyway.
> > >
> > Why?
>
> To avoid bus renumbering on reboot after you add a pci-to-pci bridge.
>
Why should qemu care?
--
Gleb.
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, (continued)
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/21
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device,
Gleb Natapov <=
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Michael S. Tsirkin, 2010/11/22
- Re: [Qemu-devel] Re: [PATCH] PCI: Bus number from the bridge, not the device, Gleb Natapov, 2010/11/22