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| author | Alex Williamson <alex.williamson@redhat.com> | 2016-01-18 16:06:03 -0700 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-12-20 11:25:36 -0500 |
| commit | c2077e2ca0da75b6b97e2485a41b8168e2a387c2 (patch) | |
| tree | 17861c7c23b58919a45094647ffc727d943e83e5 /hw/core | |
| parent | 27c1da512994b34912dbb8d12982045da1450e65 (diff) | |
| download | qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.zip qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.tar.gz qemu-c2077e2ca0da75b6b97e2485a41b8168e2a387c2.tar.bz2 | |
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')
0 files changed, 0 insertions, 0 deletions