James,

On Tue, Jul 03, 2018 at 05:33:20PM +0100, James Morse wrote:

Hi Akashi,

On 23/06/18 03:20, AKASHI Takahiro wrote:

quoted

Modify arm64/Kconfig to enable kexec_file_load support.

quoted

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 42c090cf0292..f68318f61c85 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig

@@ -835,6 +835,16 @@ 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

Wasn't BIN2C only needed for purgatory?

Right. Will remove it.

x86/powerpc/s390 all select CRYPTO_SHA256 here, presumably for arch-specific
verification mechanisms. I assume we're using SIGNED_PE_FILE_VERIFICATION instead.

To be clear, hash check (sha256) will be done at reboot (in purgatory),
while binary verification will be done at load.

quoted

+	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.
+
 config CRASH_DUMP
 	bool "Build kdump crash kernel"
 	help

Acked-by: James Morse <james.morse@arm.com>

Thanks!
-Takahiro AKASHI

Thanks,

James