alistair23-linux/drivers/xen/xen-pciback
Jan Beulich d2bd05d88d xen-pciback: return proper values during BAR sizing
Reads following writes with all address bits set to 1 should return all
changeable address bits as one, not the BAR size (nor, as was the case
for the upper half of 64-bit BARs, the high half of the region's end
address). Presumably this didn't cause any problems so far because
consumers use the value to calculate the size (usually via val & -val),
and do nothing else with it.

But also consider the exception here: Unimplemented BARs should always
return all zeroes.

And finally, the check for whether to return the sizing address on read
for the ROM BAR should ignore all non-address bits, not just the ROM
Enable one.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-06-24 10:53:03 +01:00
..
conf_space.c xen/pciback: Fix conf_space read/write overlap check. 2016-06-23 11:36:15 +01:00
conf_space.h
conf_space_capability.c
conf_space_header.c xen-pciback: return proper values during BAR sizing 2016-06-24 10:53:03 +01:00
conf_space_quirks.c
conf_space_quirks.h
Makefile
passthrough.c
pci_stub.c
pciback.h
pciback_ops.c xen: features and fixes for 4.6-rc0 2016-03-22 12:55:17 -07:00
vpci.c
xenbus.c xen: audit usages of module.h ; remove unnecessary instances 2016-03-21 15:13:32 +00:00