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Subject[PATCH v3 09/10] arm64: enable KEXEC_FILE config
Modify arm64/Kconfig and Makefile to enable kexec_file_load support.

Signed-off-by: AKASHI Takahiro <>
Cc: Catalin Marinas <>
Cc: Will Deacon <>
arch/arm64/Kconfig | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index dfd908630631..fa7299f08cc6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -756,6 +756,28 @@ config KEXEC
but it is independent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.

+config KEXEC_FILE
+ bool "kexec file based system call"
+ select KEXEC_CORE
+ select BUILD_BIN2C
+ ---help---
+ This is new version of kexec system call. This system call is
+ file based and takes file descriptors as system call argument
+ for kernel and initramfs as opposed to list of segments as
+ accepted by previous system call.
+ In addition to this option, you need to enable a specific type
+ of image support.
+ bool "Verify kernel signature during kexec_file_load() syscall"
+ depends on KEXEC_FILE
+ ---help---
+ Select this option to verify a signature with loaded kernel
+ image. If configured, any attempt of loading a image without
+ valid signature will fail.
bool "Build kdump crash kernel"
 \ /
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