From: Gerd Hoffmann <kraxel@redhat.com>
To: Kevin O'Connor <kevin@koconnor.net>
Cc: Marcel Apfelbaum <marcel@redhat.com>,
seabios@seabios.org, lersek@redhat.com, qemu-devel@nongnu.org,
mst@redhat.com
Subject: Re: [Qemu-devel] [PATCH V2] pci: fixes to allow booting from extra root pci buses.
Date: Fri, 12 Jun 2015 08:00:32 +0200 [thread overview]
Message-ID: <1434088832.28479.7.camel@redhat.com> (raw)
In-Reply-To: <20150611191058.GA28252@morn.localdomain>
Hi,
> On each boot, coreboot might decide to assign a different bus id to
> the extra roots (for example, if a device with a PCI bridge is
> inserted and it's bus allocation causes bus ids to shift).
> Technically, coreboot could even change the order extra buses are
> assigned bus ids, but doesn't today.
>
> This was seen on several AMD systems - I'm told at least some Intel
> systems have multiple root buses, but the bus numbers are just hard
> wired.
This is how the qemu pxb works: root bus numbers are a config option for
the root bridge device, i.e. from the guest point of view they are
hard-wired.
cheers,
Gerd
next prev parent reply other threads:[~2015-06-12 6:00 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-11 13:37 [Qemu-devel] [PATCH V2] pci: fixes to allow booting from extra root pci buses Marcel Apfelbaum
2015-06-11 13:57 ` Laszlo Ersek
2015-06-11 13:58 ` Kevin O'Connor
2015-06-11 14:12 ` Marcel Apfelbaum
2015-06-11 14:24 ` Kevin O'Connor
2015-06-11 14:36 ` Marcel Apfelbaum
2015-06-11 15:00 ` Laszlo Ersek
2015-06-11 16:54 ` Kevin O'Connor
2015-06-11 17:46 ` Marcel Apfelbaum
2015-06-11 18:34 ` Laszlo Ersek
2015-06-11 19:24 ` Kevin O'Connor
2015-06-12 9:25 ` Laszlo Ersek
2015-06-12 13:03 ` Kevin O'Connor
2015-06-12 15:45 ` Laszlo Ersek
2015-06-12 18:40 ` Kevin O'Connor
2015-06-12 20:13 ` Laszlo Ersek
2015-06-14 12:05 ` Michael S. Tsirkin
2015-06-14 14:50 ` Kevin O'Connor
2015-06-14 18:06 ` Michael S. Tsirkin
2015-06-14 18:21 ` Kevin O'Connor
2015-06-14 21:39 ` Benjamin Herrenschmidt
2015-06-14 21:59 ` Kevin O'Connor
2015-06-15 2:50 ` Benjamin Herrenschmidt
2015-06-15 8:22 ` Michael S. Tsirkin
2015-06-11 19:10 ` Kevin O'Connor
2015-06-12 6:00 ` Gerd Hoffmann [this message]
2015-06-12 12:17 ` Marcel Apfelbaum
2015-06-12 13:23 ` Kevin O'Connor
2015-06-15 6:01 ` Gerd Hoffmann
2015-06-15 6:50 ` Gerd Hoffmann
2015-06-15 9:02 ` Marcel Apfelbaum
2015-06-15 9:43 ` Michael S. Tsirkin
2015-06-15 10:18 ` Gerd Hoffmann
2015-06-15 10:26 ` Michael S. Tsirkin
2015-06-11 14:35 ` Laszlo Ersek
2015-06-11 16:48 ` Kevin O'Connor
2015-06-11 18:38 ` [Qemu-devel] [SeaBIOS] " Laszlo Ersek
2015-06-14 12:10 ` [Qemu-devel] " Michael S. Tsirkin
2015-06-14 13:47 ` Kevin O'Connor
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