xen/pciback: guest SR-IOV support for PV guest

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These changes are for PV guest to use Virtual Function. Because the VF's
vendor, device registers in cfg space are 0xffff, which are invalid and
ignored by PCI device scan. Values in 'struct pci_dev' are fixed up by
SR-IOV code, and using these values will present correct VID and DID to
PV guest kernel.

And command registers in the cfg space are read only 0, which means we
have to emulate MMIO enable bit (VF only uses MMIO  resource) so PV
kernel can work properly.

Acked-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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Zhao, Yu 2010-03-03 13:27:55 -05:00 • committed by Konrad Rzeszutek Wilk

parent 6221a9b2a1

commit fd5b221b34

1 changed files with 66 additions and 5 deletions

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drivers/xen/xen-pciback/conf_space_header.c

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