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| author | Alex Williamson | 2016-01-19 00:06:03 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin | 2018-12-20 17:25:36 +0100 |
| commit | c2077e2ca0da75b6b97e2485a41b8168e2a387c2 (patch) | |
| tree | 17861c7c23b58919a45094647ffc727d943e83e5 /hw/core/split-irq.c | |
| parent | spapr_pci: perform unplug via the hotplug handler (diff) | |
| download | qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.tar.gz qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.tar.xz qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.zip | |
pci: Adjust PCI config limit based on bus topology
A conventional PCI bus does not support config space accesses above
the standard 256 byte configuration space. PCIe-to-PCI bridges are
not permitted to forward transactions if the extended register address
field is non-zero and must handle it as an unsupported request (PCIe
bridge spec rev 1.0, 4.1.3, 4.1.4). Therefore, we should not support
extended config space if there is a conventional bus anywhere on the
path to a device.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/core/split-irq.c')
0 files changed, 0 insertions, 0 deletions