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    Subject[PATCH v13 09/16] arm64: enable KEXEC_FILE config
    Date
    Modify arm64/Kconfig to enable kexec_file_load support.

    Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Acked-by: James Morse <james.morse@arm.com>
    ---
    arch/arm64/Kconfig | 9 +++++++++
    arch/arm64/kernel/Makefile | 3 ++-
    arch/arm64/kernel/machine_kexec_file.c | 16 ++++++++++++++++
    3 files changed, 27 insertions(+), 1 deletion(-)
    create mode 100644 arch/arm64/kernel/machine_kexec_file.c

    diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
    index 1494d5cfd681..5988e767526f 100644
    --- a/arch/arm64/Kconfig
    +++ b/arch/arm64/Kconfig
    @@ -852,6 +852,15 @@ 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
    + 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
    diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
    index 95ac7374d723..8f1326b2d327 100644
    --- a/arch/arm64/kernel/Makefile
    +++ b/arch/arm64/kernel/Makefile
    @@ -49,8 +49,9 @@ arm64-obj-$(CONFIG_ARM64_ACPI_PARKING_PROTOCOL) += acpi_parking_protocol.o
    arm64-obj-$(CONFIG_PARAVIRT) += paravirt.o
    arm64-obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
    arm64-obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate-asm.o
    -arm64-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o \
    +arm64-obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o relocate_kernel.o \
    cpu-reset.o
    +arm64-obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o
    arm64-obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
    arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
    arm64-obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
    diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
    new file mode 100644
    index 000000000000..c38a8048ed00
    --- /dev/null
    +++ b/arch/arm64/kernel/machine_kexec_file.c
    @@ -0,0 +1,16 @@
    +// SPDX-License-Identifier: GPL-2.0
    +/*
    + * kexec_file for arm64
    + *
    + * Copyright (C) 2018 Linaro Limited
    + * Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
    + *
    + */
    +
    +#define pr_fmt(fmt) "kexec_file: " fmt
    +
    +#include <linux/kexec.h>
    +
    +const struct kexec_file_ops * const kexec_file_loaders[] = {
    + NULL
    +};
    --
    2.18.0
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