1 files changed, 19 insertions, 4 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 61a56b100c62..dd0bfc291a68 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -475,10 +475,11 @@ running once the system is up.
                         See Documentation/block/as-iosched.txt and
                         Documentation/block/deadline-iosched.txt for details.
 
-        elfcorehdr=     [IA-32]
+        elfcorehdr=     [IA-32, X86_64]
                         Specifies physical address of start of kernel core
-                        image elf header.
-                        See Documentation/kdump.txt for details.
+                        image elf header. Generally kexec loader will
+                        pass this option to capture kernel.
+                        See Documentation/kdump/kdump.txt for details.
 
         enforcing       [SELINUX] Set initial enforcing status.
                         Format: {"0" | "1"}
@@ -832,7 +833,7 @@ running once the system is up.
         mem=nopentium   [BUGS=IA-32] Disable usage of 4MB pages for kernel
                         memory.
 
-        memmap=exactmap [KNL,IA-32] Enable setting of an exact
+        memmap=exactmap [KNL,IA-32,X86_64] Enable setting of an exact
                         E820 memory map, as specified by the user.
                         Such memmap=exactmap lines can be constructed based on
                         BIOS output or other requirements. See the memmap=nn@ss
@@ -910,6 +911,14 @@ running once the system is up.
         nfsroot=        [NFS] nfs root filesystem for disk-less boxes.
                         See Documentation/nfsroot.txt.
 
+        nfs.callback_tcpport=
+                        [NFS] set the TCP port on which the NFSv4 callback
+                        channel should listen.
+
+        nfs.idmap_cache_timeout=
+                        [NFS] set the maximum lifetime for idmapper cache
+                        entries.
+
         nmi_watchdog=   [KNL,BUGS=IA-32] Debugging features for SMP kernels
 
         no387           [BUGS=IA-32] Tells the kernel to use the 387 maths
@@ -990,6 +999,8 @@ running once the system is up.
 
         nowb            [ARM]
 
+        nr_uarts=       [SERIAL] maximum number of UARTs to be registered.
+
         opl3=           [HW,OSS]
                         Format: <io>
 
@@ -1168,6 +1179,10 @@ running once the system is up.
                         Limit processor to maximum C-state
                         max_cstate=9 overrides any DMI blacklist limit.
 
+        processor.nocst [HW,ACPI]
+                        Ignore the _CST method to determine C-states,
+                        instead using the legacy FADT method
+
         prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
                         before loading.
                         See Documentation/ramdisk.txt.