From: Alexander Graf <g...@amazon.com>
We have all generic code in place now to support Kexec with KHO. This
patch adds a config option that depends on architecture support to
enable KHO support.
Signed-off-by: Alexander Graf <g...@amazon.com>
Co-developed-by: Mike Rapoport (Microsoft) <r...@kernel.org>
Signed-off-by: Mike Rapoport (Microsoft) <r...@kernel.org>
Signed-off-by: Changyuan Lyu <changyu...@google.com>
---
kernel/Kconfig.kexec | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
index 4d111f8719516..4fa212909d699 100644
--- a/kernel/Kconfig.kexec
+++ b/kernel/Kconfig.kexec
@@ -95,6 +95,20 @@ config KEXEC_JUMP
Jump between original kernel and kexeced kernel and invoke
code in physical address mode via KEXEC
+config KEXEC_HANDOVER
+ bool "kexec handover"
+ depends on ARCH_SUPPORTS_KEXEC_HANDOVER && ARCH_SUPPORTS_KEXEC_FILE
+ select MEMBLOCK_KHO_SCRATCH
+ select KEXEC_FILE
+ select DEBUG_FS
+ select LIBFDT
+ select CMA
+ help
+ Allow kexec to hand over state across kernels by generating and
+ passing additional metadata to the target kernel. This is useful
+ to keep data or state alive across the kexec. For this to work,
+ both source and target kernels need to have this option enabled.
+
config CRASH_DUMP
bool "kernel crash dumps"
default ARCH_DEFAULT_CRASH_DUMP
--
2.49.0.1015.ga840276032-goog
