PCI: Document hpiosize= and hpmemsize= resource reservation parameters

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>

PCI: Document hpiosize= and hpmemsize= resource reservation parameters
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>
Yijing Wang · Bjorn Helgaas
1 parent 1c531d82ee
Showing 1 changed file with 6 additions and 0 deletions Side-by-side Diff
Documentation/kernel-parameters.txt
@@ -2248,6 +2248,12 @@
 				the default.
 				off: Turn ECRC off
 				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
 				if allocations done by BIOS are too small to
 				accommodate resources required by all child
...	...	@@ -2248,6 +2248,12 @@
2248	2248	the default.
2249	2249	off: Turn ECRC off
2250	2250	on: Turn ECRC on.
	2251	+ hpiosize=nn[KMG] The fixed amount of bus space which is
	2252	+ reserved for hotplug bridge's IO window.
	2253	+ Default size is 256 bytes.
	2254	+ hpmemsize=nn[KMG] The fixed amount of bus space which is
	2255	+ reserved for hotplug bridge's memory window.
	2256	+ Default size is 2 megabytes.
2251	2257	realloc= Enable/disable reallocating PCI bridge resources
2252	2258	if allocations done by BIOS are too small to
2253	2259	accommodate resources required by all child