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PCI: Document hpiosize= and hpmemsize= resource reservation parameters

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Document PCI hotplug resource reservation parameters hpiosize and
hpmemsize.  These parameters override default hotplug I/O size (256 bytes)
and default mem size (2M).

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yijing Wang 2013-01-23 20:29:06 +08:00 committed by Bjorn Helgaas
parent 1c531d82ee
commit 8c8803c596
1 changed files with 6 additions and 0 deletions
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6
Documentation/kernel-parameters.txt
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@ -2248,6 +2248,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
the default. the default.
off: Turn ECRC off off: Turn ECRC off
on: Turn ECRC on. on: Turn ECRC on.
hpiosize=nn[KMG] The fixed amount of bus space which is
reserved for hotplug bridge's IO window.
Default size is 256 bytes.
hpmemsize=nn[KMG] The fixed amount of bus space which is
reserved for hotplug bridge's memory window.
Default size is 2 megabytes.
realloc= Enable/disable reallocating PCI bridge resources realloc= Enable/disable reallocating PCI bridge resources
if allocations done by BIOS are too small to if allocations done by BIOS are too small to
accommodate resources required by all child accommodate resources required by all child