linux-kernel - [PATCH v7 08/11] arm64: kexec_file: enable KEXEC

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Date:   Mon,  4 Dec 2017 11:57:58 +0900
From:   AKASHI Takahiro <takahiro.akashi@...aro.org>
To:     catalin.marinas@....com, will.deacon@....com,
        bauerman@...ux.vnet.ibm.com, dhowells@...hat.com,
        vgoyal@...hat.com, herbert@...dor.apana.org.au,
        davem@...emloft.net, akpm@...ux-foundation.org, mpe@...erman.id.au,
        dyoung@...hat.com, bhe@...hat.com, arnd@...db.de,
        ard.biesheuvel@...aro.org, julien.thierry@....com
Cc:     kexec@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        AKASHI Takahiro <takahiro.akashi@...aro.org>
Subject: [PATCH v7 08/11] arm64: kexec_file: enable KEXEC_FILE config

Modify arm64/Kconfig and Makefile to enable kexec_file_load support.
File-format specific hook functions to load a kernel image will
follow this patch.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
---
 arch/arm64/Kconfig | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a93339f5178f..865d110809f9 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -794,6 +794,19 @@ 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.
+
 config CRASH_DUMP
 	bool "Build kdump crash kernel"
 	help
-- 
2.14.1