powerpc/fadump: update documentation about bootargs_append

Update ABI documentation about the introduction of the new sysfs
entry bootargs_append. This sysfs entry will be used to setup the
additional parameters to be passed to dump capture kernel.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240510082114.561163-1-hbathini@linux.ibm.com

diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump b/Documentation/ABI/testing/sysfs-kernel-fadump
index c586054657d63dc992c1d68125a1cdadaec8cf83..2f9daa7ca55be0db403450535e20c78e75791ff8 100644 (file)
--- a/Documentation/ABI/testing/sysfs-kernel-fadump
+++ b/Documentation/ABI/testing/sysfs-kernel-fadump
@@ -49,3 +49,10 @@ Description: read only
                memory add/remove events because elfcorehdr is now prepared in
                the second/fadump kernel.
 User:          kexec-tools
+
+What:          /sys/kernel/fadump/bootargs_append
+Date:          May 2024
+Contact:       linuxppc-dev@lists.ozlabs.org
+Description:   read/write
+               This is a special sysfs file available to setup additional
+               parameters to be passed to capture kernel.