summaryrefslogtreecommitdiff
path: root/Documentation/admin-guide
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index f59aad5c2270..9b0b3dea6326 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2136,6 +2136,12 @@
memmap=nn[KMG]@ss[KMG]
[KNL] Force usage of a specific region of memory.
Region of memory to be used is from ss to ss+nn.
+ If @ss[KMG] is omitted, it is equivalent to mem=nn[KMG],
+ which limits max address to nn[KMG].
+ Multiple different regions can be specified,
+ comma delimited.
+ Example:
+ memmap=100M@2G,100M#3G,1G!1024G
memmap=nn[KMG]#ss[KMG]
[KNL,ACPI] Mark specific memory as ACPI data.
@@ -2148,6 +2154,9 @@
memmap=64K$0x18690000
or
memmap=0x10000$0x18690000
+ Some bootloaders may need an escape character before '$',
+ like Grub2, otherwise '$' and the following number
+ will be eaten.
memmap=nn[KMG]!ss[KMG]
[KNL,X86] Mark specific memory as protected.