[PATCH v7 2/8] powerpc/crash hp: introduce a new config option CRASH_HOTPLUG

[Sourabh Jain]

The config option CRASH_HOTPLUG enables in kernel update to kexec
segments due to CPU/Memory hotplug events. By default it is disabled.

Signed-off-by: Sourabh Jain <sourabhjain at linux.ibm.com>
---
 arch/powerpc/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index b8c4ac56bddc5..57d18cc5d27c5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -668,6 +668,18 @@ config CRASH_DUMP
 	  The same kernel binary can be used as production kernel and dump
 	  capture kernel.
 
+config CRASH_HOTPLUG
+	bool "Update crash capture system on CPU/Memory hotplug event"
+	default n
+	depends on CRASH_DUMP && (HOTPLUG_CPU || MEMORY_HOTPLUG)
+	help
+	  In kernel update to relevant kexec segments due to change
+	  in system configuration, rather reloading all the kexec
+	  segments again from userspace by monitoring CPU/Memory
+	  hotplug event in userspace using udev.
+
+	  If unsure, say Y.
+
 config FA_DUMP
 	bool "Firmware-assisted dump"
 	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
-- 
2.39.0