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authorBjorn Helgaas <bhelgaas@google.com>2017-12-01 18:50:33 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-12-19 06:07:46 +0100
commitffd2e8df8d138e7436e218e0a9d3447a18b888e6 (patch)
treed2a9895eb988bfb44c8690630a2f2f5f6947e291 /Documentation/admin-guide
parentirqchip/i8259: Set I/O port resource types correctly (diff)
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resource: Set type of "reserve=" user-specified resources
When we reserve regions because the user specified a "reserve=" parameter, set the resource type to either IORESOURCE_IO (for regions below 0x10000) or IORESOURCE_MEM. The test for 0x10000 is just a heuristic; obviously there can be memory below 0x10000 as well. Improve documentation of the "reserve=" parameter. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6571fbfdb2a1..78cdf6a637fc 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3675,7 +3675,11 @@
[KNL, SMP] Set scheduler's default relax_domain_level.
See Documentation/cgroup-v1/cpusets.txt.
- reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
+ reserve= [KNL,BUGS] Force kernel to ignore I/O ports or memory
+ Format: <base1>,<size1>[,<base2>,<size2>,...]
+ Reserve I/O ports or memory so the kernel won't use
+ them. If <base> is less than 0x10000, the region
+ is assumed to be I/O ports; otherwise it is memory.
reservetop= [X86-32]
Format: nn[KMG]