powerpc/fadump: add hotplug_ready sysfs interface

[linux-2.6-block.git] / Documentation / ABI / testing / sysfs-kernel-fadump

diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump b/Documentation/ABI/testing/sysfs-kernel-fadump
index 8f7a64a81783a53b4d696f79df0d5ab72cee8475..c586054657d63dc992c1d68125a1cdadaec8cf83 100644 (file)
--- a/Documentation/ABI/testing/sysfs-kernel-fadump
+++ b/Documentation/ABI/testing/sysfs-kernel-fadump
@@ -38,3 +38,14 @@ Contact:     linuxppc-dev@lists.ozlabs.org
 Description:   read only
                Provide information about the amount of memory reserved by
                FADump to save the crash dump in bytes.
+
+What:          /sys/kernel/fadump/hotplug_ready
+Date:          Apr 2024
+Contact:       linuxppc-dev@lists.ozlabs.org
+Description:   read only
+               Kdump udev rule re-registers fadump on memory add/remove events,
+               primarily to update the elfcorehdr. This sysfs indicates the
+               kdump udev rule that fadump re-registration is not required on
+               memory add/remove events because elfcorehdr is now prepared in
+               the second/fadump kernel.
+User:          kexec-tools