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authorNishanth Aravamudan <nacc@us.ibm.com>2011-02-10 12:10:47 +0300
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-03-04 10:19:05 +0300
commit4e8b0cf46b2570331a4c4157d53906883c442a22 (patch)
tree125c42222f64709d6073dc9d6ea3b9bc03624a27 /Documentation/kernel-parameters.txt
parent6edc642ebee87dfceb97050d51c5ab1fe539a597 (diff)
downloadlinux-4e8b0cf46b2570331a4c4157d53906883c442a22.tar.xz
powerpc/pseries: Add support for dynamic dma windows
If firmware allows us to map all of a partition's memory for DMA on a particular bridge, create a 1:1 mapping of that memory. Add hooks for dealing with hotplug events. Dynamic DMA windows can use larger than the default page size, and we use the largest one possible. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f4a04c0c7edc..b245ce61ecb8 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -626,6 +626,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
disable= [IPV6]
See Documentation/networking/ipv6.txt.
+ disable_ddw [PPC/PSERIES]
+ Disable Dynamic DMA Window support. Use this if
+ to workaround buggy firmware.
+
disable_ipv6= [IPV6]
See Documentation/networking/ipv6.txt.