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PCI: add a PCI resource reallocation config option

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Add a new config option, PCI_REALLOC_ENABLE_AUTO, which will
automatically try to re-allocate PCI resources if PCI_IOV support is
enabled and the SR-IOV resources are unassigned.  Behavior can still be
controlled using the pci=realloc= parameter.

-v2: According to Jesse, adding one CONFIG option for distribution to
     disable it or enable it.
-v3: update Kconfig text (jbarnes)

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yinghai Lu
2012-02-23 19:23:32 -08:00
committed by Jesse Barnes
parent eb572e7c76
commit b07f2ebc10
2 changed files with 41 additions and 0 deletions
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13
drivers/pci/Kconfig
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@@ -31,6 +31,19 @@ config PCI_DEBUG
When in doubt, say N.
config PCI_REALLOC_ENABLE_AUTO
bool "Enable PCI resource re-allocation detection"
depends on PCI
help
Say Y here if you want the PCI core to detect if PCI resource
re-allocation needs to be enabled. You can always use pci=realloc=on
or pci=realloc=off to override it. Note this feature is a no-op
unless PCI_IOV support is also enabled; in that case it will
automatically re-allocate PCI resources if SR-IOV BARs have not
been allocated by the BIOS.
When in doubt, say N.
config PCI_STUB
tristate "PCI Stub driver"
depends on PCI