New subject: [F25 PATCH]: Add initial upstream support for kexec on aarch64

Tuesday, 25 October 2016

On 10/25/16 at 02:50pm, Pingfan Liu wrote:
...
 From: Pingfan Liu <piliu(a)redhat.com&gt;

 Fix Bug 925630 - kexec-tools: support for arm64
 https://bugzilla.redhat.com/show_bug.cgi?id=925630

 Support for the ARM 64 bit CPU architecture (aarch64) was introduced in
 autoconf 2.69.  kexec-tools appears to use an earlier version of
 autoconf, preventing its being built. This series fix this issue by
 updates config.guess and config.sub to recognize aarch64 
Don't understand what you are trying to do. What I got is you are back
porting aarch64 supporting code to f25, meanwhile you found it still
doesn't work because kexec-tools is still using old autoconf. So you fix
it too in this patch. Right?

> 
> patchset backported from upstream:
>         commit abdfe97736f89d9bc73662b9134604b0229a599e
>         commit 522df5f7217fda01ece3f6ac3e9987b0320c2bb0
>         commit 217bcc00c9309416a6c6cd0584196559d28a9259
> 
> Signed-off-by: Pingfan Liu <piliu(a)redhat.com&gt;
> ---
>  0001-kexec-Add-common-device-tree-routines.patch   |  208 +++
>  0002-arm64-Add-arm64-kexec-support.patch           | 1407 ++++++++++++++++++++
>  ...-arm64-Add-support-for-binary-image-files.patch |   96 ++
>  kexec-tools.spec                                   |   20 +-
>  4 files changed, 1726 insertions(+), 5 deletions(-)
>  create mode 100644 0001-kexec-Add-common-device-tree-routines.patch
>  create mode 100644 0002-arm64-Add-arm64-kexec-support.patch
>  create mode 100644 0003-arm64-Add-support-for-binary-image-files.patch
> 
> diff --git a/0001-kexec-Add-common-device-tree-routines.patch
b/0001-kexec-Add-common-device-tree-routines.patch
> new file mode 100644
> index 0000000..87897f0
> --- /dev/null
> +++ b/0001-kexec-Add-common-device-tree-routines.patch
> @@ -0,0 +1,208 @@
> +From 217bcc00c9309416a6c6cd0584196559d28a9259 Mon Sep 17 00:00:00 2001
> +From: Geoff Levand <geoff(a)infradead.org&gt;
> +Date: Wed, 21 Sep 2016 18:14:25 +0000
> +Subject: [PATCH 1/3] kexec: Add common device tree routines
> +
> +Common device tree routines that can be shared between all arches
> +that have device tree support.
> +
> +Signed-off-by: Geoff Levand <geoff(a)infradead.org&gt;
> +Tested-By: Pratyush Anand <panand(a)redhat.com&gt;
> +Tested-By: Matthias Brugger <mbrugger(a)suse.com&gt;
> +Signed-off-by: Simon Horman <horms(a)verge.net.au&gt;
> +---
> + kexec/Makefile |   4 ++
> + kexec/dt-ops.c | 145 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> + kexec/dt-ops.h |  13 ++++++
> + 3 files changed, 162 insertions(+)
> + create mode 100644 kexec/dt-ops.c
> + create mode 100644 kexec/dt-ops.h
> +
> +diff --git a/kexec/Makefile b/kexec/Makefile
> +index e2aee84..cc3f08b 100644
> +--- a/kexec/Makefile
> ++++ b/kexec/Makefile
> +@@ -73,6 +73,10 @@ dist				+= kexec/mem_regions.c kexec/mem_regions.h
> + $(ARCH)_MEM_REGIONS		=
> + KEXEC_SRCS			+= $($(ARCH)_MEM_REGIONS)
> + 
> ++dist				+= kexec/dt-ops.c kexec/dt-ops.h
> ++$(ARCH)_DT_OPS		=
> ++KEXEC_SRCS			+= $($(ARCH)_DT_OPS)
> ++
> + include $(srcdir)/kexec/arch/alpha/Makefile
> + include $(srcdir)/kexec/arch/arm/Makefile
> + include $(srcdir)/kexec/arch/i386/Makefile
> +diff --git a/kexec/dt-ops.c b/kexec/dt-ops.c
> +new file mode 100644
> +index 0000000..915dbf5
> +--- /dev/null
> ++++ b/kexec/dt-ops.c
> +@@ -0,0 +1,145 @@
> ++#include <assert.h>
> ++#include <errno.h>
> ++#include <inttypes.h>
> ++#include <libfdt.h>
> ++#include <stdio.h>
> ++#include <stdlib.h>
> ++
> ++#include "kexec.h"
> ++#include "dt-ops.h"
> ++
> ++static const char n_chosen[] = "/chosen";
> ++
> ++static const char p_bootargs[] = "bootargs";
> ++static const char p_initrd_start[] = "linux,initrd-start";
> ++static const char p_initrd_end[] = "linux,initrd-end";
> ++
> ++int dtb_set_initrd(char **dtb, off_t *dtb_size, off_t start, off_t end)
> ++{
> ++	int result;
> ++	uint64_t value;
> ++
> ++	dbgprintf("%s: start %jd, end %jd, size %jd (%jd KiB)\n",
> ++		__func__, (intmax_t)start, (intmax_t)end,
> ++		(intmax_t)(end - start),
> ++		(intmax_t)(end - start) / 1024);
> ++
> ++	value = cpu_to_fdt64(start);
> ++
> ++	result = dtb_set_property(dtb, dtb_size, n_chosen, p_initrd_start,
> ++		&value, sizeof(value));
> ++
> ++	if (result)
> ++		return result;
> ++
> ++	value = cpu_to_fdt64(end);
> ++
> ++	result = dtb_set_property(dtb, dtb_size, n_chosen, p_initrd_end,
> ++		&value, sizeof(value));
> ++
> ++	if (result) {
> ++		dtb_delete_property(*dtb, n_chosen, p_initrd_start);
> ++		return result;
> ++	}
> ++
> ++	return 0;
> ++}
> ++
> ++int dtb_set_bootargs(char **dtb, off_t *dtb_size, const char *command_line)
> ++{
> ++	return dtb_set_property(dtb, dtb_size, n_chosen, p_bootargs,
> ++		command_line, strlen(command_line) + 1);
> ++}
> ++
> ++int dtb_set_property(char **dtb, off_t *dtb_size, const char *node,
> ++	const char *prop, const void *value, int value_len)
> ++{
> ++	int result;
> ++	int nodeoffset;
> ++	void *new_dtb;
> ++	int new_size;
> ++
> ++	value_len = FDT_TAGALIGN(value_len);
> ++
> ++	new_size = FDT_TAGALIGN(*dtb_size + fdt_node_len(node)
> ++		+ fdt_prop_len(prop, value_len));
> ++
> ++	new_dtb = malloc(new_size);
> ++
> ++	if (!new_dtb) {
> ++		dbgprintf("%s: malloc failed\n", __func__);
> ++		return -ENOMEM;
> ++	}
> ++
> ++	result = fdt_open_into(*dtb, new_dtb, new_size);
> ++
> ++	if (result) {
> ++		dbgprintf("%s: fdt_open_into failed: %s\n", __func__,
> ++			fdt_strerror(result));
> ++		goto on_error;
> ++	}
> ++
> ++	nodeoffset = fdt_path_offset(new_dtb, node);
> ++	
> ++	if (nodeoffset == -FDT_ERR_NOTFOUND) {
> ++		result = fdt_add_subnode(new_dtb, nodeoffset, node);
> ++
> ++		if (result) {
> ++			dbgprintf("%s: fdt_add_subnode failed: %s\n", __func__,
> ++				fdt_strerror(result));
> ++			goto on_error;
> ++		}
> ++	} else if (nodeoffset < 0) {
> ++		dbgprintf("%s: fdt_path_offset failed: %s\n", __func__,
> ++			fdt_strerror(nodeoffset));
> ++		goto on_error;
> ++	}
> ++
> ++	result = fdt_setprop(new_dtb, nodeoffset, prop, value, value_len);
> ++
> ++	if (result) {
> ++		dbgprintf("%s: fdt_setprop failed: %s\n", __func__,
> ++			fdt_strerror(result));
> ++		goto on_error;
> ++	}
> ++
> ++	/*
> ++	 * Can't call free on dtb since dtb may have been mmaped by
> ++	 * slurp_file().
> ++	 */
> ++
> ++	result = fdt_pack(new_dtb);
> ++
> ++	if (result)
> ++		dbgprintf("%s: Unable to pack device tree: %s\n", __func__,
> ++			fdt_strerror(result));
> ++
> ++	*dtb = new_dtb;
> ++	*dtb_size = fdt_totalsize(*dtb);
> ++
> ++	return 0;
> ++
> ++on_error:
> ++	free(new_dtb);
> ++	return result;
> ++}
> ++
> ++int dtb_delete_property(char *dtb, const char *node, const char *prop)
> ++{
> ++	int result;
> ++	int nodeoffset = fdt_path_offset(dtb, node);
> ++
> ++	if (nodeoffset < 0) {
> ++		dbgprintf("%s: fdt_path_offset failed: %s\n", __func__,
> ++			fdt_strerror(nodeoffset));
> ++		return nodeoffset;
> ++	}
> ++
> ++	result = fdt_delprop(dtb, nodeoffset, prop);
> ++
> ++	if (result)
> ++		dbgprintf("%s: fdt_delprop failed: %s\n", __func__,
> ++			fdt_strerror(nodeoffset));
> ++
> ++	return result;
> ++}
> +diff --git a/kexec/dt-ops.h b/kexec/dt-ops.h
> +new file mode 100644
> +index 0000000..e70d15d
> +--- /dev/null
> ++++ b/kexec/dt-ops.h
> +@@ -0,0 +1,13 @@
> ++#if !defined(KEXEC_DT_OPS_H)
> ++#define KEXEC_DT_OPS_H
> ++
> ++#include <sys/types.h>
> ++
> ++int dtb_set_initrd(char **dtb, off_t *dtb_size, off_t start, off_t end);
> ++int dtb_set_bootargs(char **dtb, off_t *dtb_size, const char *command_line);
> ++int dtb_set_property(char **dtb, off_t *dtb_size, const char *node,
> ++	const char *prop, const void *value, int value_len);
> ++
> ++int dtb_delete_property(char *dtb, const char *node, const char *prop);
> ++
> ++#endif
> +-- 
> +2.9.3
> +
> diff --git a/0002-arm64-Add-arm64-kexec-support.patch
b/0002-arm64-Add-arm64-kexec-support.patch
> new file mode 100644
> index 0000000..0c14b1b
> --- /dev/null
> +++ b/0002-arm64-Add-arm64-kexec-support.patch
> @@ -0,0 +1,1407 @@
> +From 522df5f7217fda01ece3f6ac3e9987b0320c2bb0 Mon Sep 17 00:00:00 2001
> +From: Geoff Levand <geoff(a)infradead.org&gt;
> +Date: Wed, 21 Sep 2016 18:14:25 +0000
> +Subject: [PATCH 2/3] arm64: Add arm64 kexec support
> +
> +Add kexec reboot support for ARM64 platforms.
> +
> +Signed-off-by: Geoff Levand <geoff(a)infradead.org&gt;
> +Tested-By: Pratyush Anand <panand(a)redhat.com&gt;
> +Tested-By: Matthias Brugger <mbrugger(a)suse.com&gt;
> +Signed-off-by: Simon Horman <horms(a)verge.net.au&gt;
> +---
> + configure.ac                            |   3 +
> + kexec/Makefile                          |   1 +
> + kexec/arch/arm64/Makefile               |  40 +++
> + kexec/arch/arm64/crashdump-arm64.c      |  21 ++
> + kexec/arch/arm64/crashdump-arm64.h      |  12 +
> + kexec/arch/arm64/image-header.h         | 146 ++++++++
> + kexec/arch/arm64/include/arch/options.h |  39 ++
> + kexec/arch/arm64/kexec-arm64.c          | 615 ++++++++++++++++++++++++++++++++
> + kexec/arch/arm64/kexec-arm64.h          |  71 ++++
> + kexec/arch/arm64/kexec-elf-arm64.c      | 146 ++++++++
> + kexec/arch/arm64/kexec-image-arm64.c    |  41 +++
> + kexec/kexec-syscall.h                   |   8 +-
> + purgatory/Makefile                      |   1 +
> + purgatory/arch/arm64/Makefile           |  18 +
> + purgatory/arch/arm64/entry.S            |  51 +++
> + purgatory/arch/arm64/purgatory-arm64.c  |  19 +
> + 16 files changed, 1230 insertions(+), 2 deletions(-)
> + create mode 100644 kexec/arch/arm64/Makefile
> + create mode 100644 kexec/arch/arm64/crashdump-arm64.c
> + create mode 100644 kexec/arch/arm64/crashdump-arm64.h
> + create mode 100644 kexec/arch/arm64/image-header.h
> + create mode 100644 kexec/arch/arm64/include/arch/options.h
> + create mode 100644 kexec/arch/arm64/kexec-arm64.c
> + create mode 100644 kexec/arch/arm64/kexec-arm64.h
> + create mode 100644 kexec/arch/arm64/kexec-elf-arm64.c
> + create mode 100644 kexec/arch/arm64/kexec-image-arm64.c
> + create mode 100644 purgatory/arch/arm64/Makefile
> + create mode 100644 purgatory/arch/arm64/entry.S
> + create mode 100644 purgatory/arch/arm64/purgatory-arm64.c
> +
> +diff --git a/configure.ac b/configure.ac
> +index 2bc5767..252b048 100644
> +--- a/configure.ac
> ++++ b/configure.ac
> +@@ -34,6 +34,9 @@ case $target_cpu in
> + 		ARCH="ppc64"
> + 		SUBARCH="LE"
> + 		;;
> ++	aarch64* )
> ++		ARCH="arm64"
> ++		;;
> + 	arm* )
> + 		ARCH="arm"
> + 		;;
> +diff --git a/kexec/Makefile b/kexec/Makefile
> +index cc3f08b..39f365f 100644
> +--- a/kexec/Makefile
> ++++ b/kexec/Makefile
> +@@ -79,6 +79,7 @@ KEXEC_SRCS			+= $($(ARCH)_DT_OPS)
> + 
> + include $(srcdir)/kexec/arch/alpha/Makefile
> + include $(srcdir)/kexec/arch/arm/Makefile
> ++include $(srcdir)/kexec/arch/arm64/Makefile
> + include $(srcdir)/kexec/arch/i386/Makefile
> + include $(srcdir)/kexec/arch/ia64/Makefile
> + include $(srcdir)/kexec/arch/m68k/Makefile
> +diff --git a/kexec/arch/arm64/Makefile b/kexec/arch/arm64/Makefile
> +new file mode 100644
> +index 0000000..37414dc
> +--- /dev/null
> ++++ b/kexec/arch/arm64/Makefile
> +@@ -0,0 +1,40 @@
> ++
> ++arm64_FS2DT += kexec/fs2dt.c
> ++arm64_FS2DT_INCLUDE += -include $(srcdir)/kexec/arch/arm64/kexec-arm64.h \
> ++	-include $(srcdir)/kexec/arch/arm64/crashdump-arm64.h
> ++
> ++arm64_DT_OPS += kexec/dt-ops.c
> ++
> ++arm64_CPPFLAGS += -I $(srcdir)/kexec/
> ++
> ++arm64_KEXEC_SRCS += \
> ++	kexec/arch/arm64/kexec-arm64.c \
> ++	kexec/arch/arm64/kexec-image-arm64.c \
> ++	kexec/arch/arm64/kexec-elf-arm64.c \
> ++	kexec/arch/arm64/crashdump-arm64.c
> ++
> ++arm64_ARCH_REUSE_INITRD =
> ++arm64_ADD_SEGMENT =
> ++arm64_VIRT_TO_PHYS =
> ++arm64_PHYS_TO_VIRT =
> ++
> ++dist += $(arm64_KEXEC_SRCS) \
> ++	kexec/arch/arm64/Makefile \
> ++	kexec/arch/arm64/kexec-arm64.h \
> ++	kexec/arch/arm64/crashdump-arm64.h
> ++
> ++ifdef HAVE_LIBFDT
> ++
> ++LIBS += -lfdt
> ++
> ++else
> ++
> ++include $(srcdir)/kexec/libfdt/Makefile.libfdt
> ++
> ++libfdt_SRCS += $(LIBFDT_SRCS:%=kexec/libfdt/%)
> ++
> ++arm64_CPPFLAGS += -I$(srcdir)/kexec/libfdt
> ++
> ++arm64_KEXEC_SRCS += $(libfdt_SRCS)
> ++
> ++endif
> +diff --git a/kexec/arch/arm64/crashdump-arm64.c
b/kexec/arch/arm64/crashdump-arm64.c
> +new file mode 100644
> +index 0000000..d2272c8
> +--- /dev/null
> ++++ b/kexec/arch/arm64/crashdump-arm64.c
> +@@ -0,0 +1,21 @@
> ++/*
> ++ * ARM64 crashdump.
> ++ */
> ++
> ++#define _GNU_SOURCE
> ++
> ++#include <errno.h>
> ++#include <linux/elf.h>
> ++
> ++#include "kexec.h"
> ++#include "crashdump.h"
> ++#include "crashdump-arm64.h"
> ++#include "kexec-arm64.h"
> ++#include "kexec-elf.h"
> ++
> ++struct memory_ranges usablemem_rgns = {};
> ++
> ++int is_crashkernel_mem_reserved(void)
> ++{
> ++	return 0;
> ++}
> +diff --git a/kexec/arch/arm64/crashdump-arm64.h
b/kexec/arch/arm64/crashdump-arm64.h
> +new file mode 100644
> +index 0000000..f33c7a2
> +--- /dev/null
> ++++ b/kexec/arch/arm64/crashdump-arm64.h
> +@@ -0,0 +1,12 @@
> ++/*
> ++ * ARM64 crashdump.
> ++ */
> ++
> ++#if !defined(CRASHDUMP_ARM64_H)
> ++#define CRASHDUMP_ARM64_H
> ++
> ++#include "kexec.h"
> ++
> ++extern struct memory_ranges usablemem_rgns;
> ++
> ++#endif
> +diff --git a/kexec/arch/arm64/image-header.h b/kexec/arch/arm64/image-header.h
> +new file mode 100644
> +index 0000000..158d411
> +--- /dev/null
> ++++ b/kexec/arch/arm64/image-header.h
> +@@ -0,0 +1,146 @@
> ++/*
> ++ * ARM64 binary image header.
> ++ */
> ++
> ++#if !defined(__ARM64_IMAGE_HEADER_H)
> ++#define __ARM64_IMAGE_HEADER_H
> ++
> ++#include <endian.h>
> ++#include <stdint.h>
> ++
> ++/**
> ++ * struct arm64_image_header - arm64 kernel image header.
> ++ *
> ++ * @pe_sig: Optional PE format 'MZ' signature.
> ++ * @branch_code: Reserved for instructions to branch to stext.
> ++ * @text_offset: The image load offset in LSB byte order.
> ++ * @image_size: An estimated size of the memory image size in LSB byte order.
> ++ * @flags: Bit flags in LSB byte order:
> ++ *   Bit 0:   Image byte order: 1=MSB.
> ++ *   Bit 1-2: Kernel page size: 1=4K, 2=16K, 3=64K.
> ++ *   Bit 3:   Image placement: 0=low.
> ++ * @reserved_1: Reserved.
> ++ * @magic: Magic number, "ARM\x64".
> ++ * @pe_header: Optional offset to a PE format header.
> ++ **/
> ++
> ++struct arm64_image_header {
> ++	uint8_t pe_sig[2];
> ++	uint16_t branch_code[3];
> ++	uint64_t text_offset;
> ++	uint64_t image_size;
> ++	uint64_t flags;
> ++	uint64_t reserved_1[3];
> ++	uint8_t magic[4];
> ++	uint32_t pe_header;
> ++};
> ++
> ++static const uint8_t arm64_image_magic[4] = {'A', 'R', 'M',
0x64U};
> ++static const uint8_t arm64_image_pe_sig[2] = {'M', 'Z'};
> ++static const uint64_t arm64_image_flag_be = (1UL << 0);
> ++static const uint64_t arm64_image_flag_page_size = (3UL << 1);
> ++static const uint64_t arm64_image_flag_placement = (1UL << 3);
> ++
> ++/**
> ++ * enum arm64_header_page_size
> ++ */
> ++
> ++enum arm64_header_page_size {
> ++	arm64_header_page_size_invalid = 0,
> ++	arm64_header_page_size_4k,
> ++	arm64_header_page_size_16k,
> ++	arm64_header_page_size_64k
> ++};
> ++
> ++/**
> ++ * arm64_header_check_magic - Helper to check the arm64 image header.
> ++ *
> ++ * Returns non-zero if header is OK.
> ++ */
> ++
> ++static inline int arm64_header_check_magic(const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return (h->magic[0] == arm64_image_magic[0]
> ++		&& h->magic[1] == arm64_image_magic[1]
> ++		&& h->magic[2] == arm64_image_magic[2]
> ++		&& h->magic[3] == arm64_image_magic[3]);
> ++}
> ++
> ++/**
> ++ * arm64_header_check_pe_sig - Helper to check the arm64 image header.
> ++ *
> ++ * Returns non-zero if 'MZ' signature is found.
> ++ */
> ++
> ++static inline int arm64_header_check_pe_sig(const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return (h->pe_sig[0] == arm64_image_pe_sig[0]
> ++		&& h->pe_sig[1] == arm64_image_pe_sig[1]);
> ++}
> ++
> ++/**
> ++ * arm64_header_check_msb - Helper to check the arm64 image header.
> ++ *
> ++ * Returns non-zero if the image was built as big endian.
> ++ */
> ++
> ++static inline int arm64_header_check_msb(const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return (le64toh(h->flags) & arm64_image_flag_be) >> 0;
> ++}
> ++
> ++/**
> ++ * arm64_header_page_size
> ++ */
> ++
> ++static inline enum arm64_header_page_size arm64_header_page_size(
> ++	const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return (le64toh(h->flags) & arm64_image_flag_page_size) >> 1;
> ++}
> ++
> ++/**
> ++ * arm64_header_placement
> ++ *
> ++ * Returns non-zero if the image has no physical placement restrictions.
> ++ */
> ++
> ++static inline int arm64_header_placement(const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return (le64toh(h->flags) & arm64_image_flag_placement) >> 3;
> ++}
> ++
> ++static inline uint64_t arm64_header_text_offset(
> ++	const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return le64toh(h->text_offset);
> ++}
> ++
> ++static inline uint64_t arm64_header_image_size(
> ++	const struct arm64_image_header *h)
> ++{
> ++	if (!h)
> ++		return 0;
> ++
> ++	return le64toh(h->image_size);
> ++}
> ++
> ++#endif
> +diff --git a/kexec/arch/arm64/include/arch/options.h
b/kexec/arch/arm64/include/arch/options.h
> +new file mode 100644
> +index 0000000..a17d933
> +--- /dev/null
> ++++ b/kexec/arch/arm64/include/arch/options.h
> +@@ -0,0 +1,39 @@
> ++#if !defined(KEXEC_ARCH_ARM64_OPTIONS_H)
> ++#define KEXEC_ARCH_ARM64_OPTIONS_H
> ++
> ++#define OPT_APPEND		((OPT_MAX)+0)
> ++#define OPT_DTB			((OPT_MAX)+1)
> ++#define OPT_INITRD		((OPT_MAX)+2)
> ++#define OPT_REUSE_CMDLINE	((OPT_MAX)+3)
> ++#define OPT_ARCH_MAX		((OPT_MAX)+4)
> ++
> ++#define KEXEC_ARCH_OPTIONS \
> ++	KEXEC_OPTIONS \
> ++	{ "append",        1, NULL, OPT_APPEND }, \
> ++	{ "command-line",  1, NULL, OPT_APPEND }, \
> ++	{ "dtb",           1, NULL, OPT_DTB }, \
> ++	{ "initrd",        1, NULL, OPT_INITRD }, \
> ++	{ "ramdisk",       1, NULL, OPT_INITRD }, \
> ++	{ "reuse-cmdline", 0, NULL, OPT_REUSE_CMDLINE }, \
> ++
> ++#define KEXEC_ARCH_OPT_STR KEXEC_OPT_STR /* Only accept long arch options. */
> ++#define KEXEC_ALL_OPTIONS KEXEC_ARCH_OPTIONS
> ++#define KEXEC_ALL_OPT_STR KEXEC_ARCH_OPT_STR
> ++
> ++static const char arm64_opts_usage[] __attribute__ ((unused)) =
> ++"     --append=STRING       Set the kernel command line to STRING.\n"
> ++"     --command-line=STRING Set the kernel command line to STRING.\n"
> ++"     --dtb=FILE            Use FILE as the device tree blob.\n"
> ++"     --initrd=FILE         Use FILE as the kernel initial ramdisk.\n"
> ++"     --ramdisk=FILE        Use FILE as the kernel initial ramdisk.\n"
> ++"     --reuse-cmdline       Use kernel command line from running
system.\n";
> ++
> ++struct arm64_opts {
> ++	const char *command_line;
> ++	const char *dtb;
> ++	const char *initrd;
> ++};
> ++
> ++extern struct arm64_opts arm64_opts;
> ++
> ++#endif
> +diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
> +new file mode 100644
> +index 0000000..2e8839a
> +--- /dev/null
> ++++ b/kexec/arch/arm64/kexec-arm64.c
> +@@ -0,0 +1,615 @@
> ++/*
> ++ * ARM64 kexec.
> ++ */
> ++
> ++#define _GNU_SOURCE
> ++
> ++#include <assert.h>
> ++#include <errno.h>
> ++#include <getopt.h>
> ++#include <inttypes.h>
> ++#include <libfdt.h>
> ++#include <limits.h>
> ++#include <stdlib.h>
> ++#include <sys/stat.h>
> ++#include <linux/elf-em.h>
> ++#include <elf.h>
> ++
> ++#include "kexec.h"
> ++#include "kexec-arm64.h"
> ++#include "crashdump.h"
> ++#include "crashdump-arm64.h"
> ++#include "dt-ops.h"
> ++#include "fs2dt.h"
> ++#include "kexec-syscall.h"
> ++#include "arch/options.h"
> ++
> ++/* Global varables the core kexec routines expect. */
> ++
> ++unsigned char reuse_initrd;
> ++
> ++off_t initrd_base;
> ++off_t initrd_size;
> ++
> ++const struct arch_map_entry arches[] = {
> ++	{ "aarch64", KEXEC_ARCH_ARM64 },
> ++	{ "aarch64_be", KEXEC_ARCH_ARM64 },
> ++	{ NULL, 0 },
> ++};
> ++
> ++struct file_type file_type[] = {
> ++	{"vmlinux", elf_arm64_probe, elf_arm64_load, elf_arm64_usage},
> ++	{"Image", image_arm64_probe, image_arm64_load, image_arm64_usage},
> ++};
> ++
> ++int file_types = sizeof(file_type) / sizeof(file_type[0]);
> ++
> ++/* arm64 global varables. */
> ++
> ++struct arm64_opts arm64_opts;
> ++struct arm64_mem arm64_mem = {
> ++	.phys_offset = arm64_mem_ngv,
> ++	.vp_offset = arm64_mem_ngv,
> ++};
> ++
> ++uint64_t get_phys_offset(void)
> ++{
> ++	assert(arm64_mem.phys_offset != arm64_mem_ngv);
> ++	return arm64_mem.phys_offset;
> ++}
> ++
> ++uint64_t get_vp_offset(void)
> ++{
> ++	assert(arm64_mem.vp_offset != arm64_mem_ngv);
> ++	return arm64_mem.vp_offset;
> ++}
> ++
> ++/**
> ++ * arm64_process_image_header - Process the arm64 image header.
> ++ *
> ++ * Make a guess that KERNEL_IMAGE_SIZE will be enough for older kernels.
> ++ */
> ++
> ++int arm64_process_image_header(const struct arm64_image_header *h)
> ++{
> ++#if !defined(KERNEL_IMAGE_SIZE)
> ++# define KERNEL_IMAGE_SIZE MiB(16)
> ++#endif
> ++
> ++	if (!arm64_header_check_magic(h))
> ++		return -EFAILED;
> ++
> ++	if (h->image_size) {
> ++		arm64_mem.text_offset = arm64_header_text_offset(h);
> ++		arm64_mem.image_size = arm64_header_image_size(h);
> ++	} else {
> ++		/* For 3.16 and older kernels. */
> ++		arm64_mem.text_offset = 0x80000;
> ++		arm64_mem.image_size = KERNEL_IMAGE_SIZE;
> ++		fprintf(stderr,
> ++			"kexec: %s: Warning: Kernel image size set to %lu MiB.\n"
> ++			"  Please verify compatability with lodaed kernel.\n",
> ++			__func__, KERNEL_IMAGE_SIZE / 1024UL / 1024UL);
> ++	}
> ++
> ++	return 0;
> ++}
> ++
> ++void arch_usage(void)
> ++{
> ++	printf(arm64_opts_usage);
> ++}
> ++
> ++int arch_process_options(int argc, char **argv)
> ++{
> ++	static const char short_options[] = KEXEC_OPT_STR "";
> ++	static const struct option options[] = {
> ++		KEXEC_ARCH_OPTIONS
> ++		{ 0 }
> ++	};
> ++	int opt;
> ++	char *cmdline = NULL;
> ++	const char *append = NULL;
> ++
> ++	for (opt = 0; opt != -1; ) {
> ++		opt = getopt_long(argc, argv, short_options, options, 0);
> ++
> ++		switch (opt) {
> ++		case OPT_APPEND:
> ++			append = optarg;
> ++			break;
> ++		case OPT_REUSE_CMDLINE:
> ++			cmdline = get_command_line();
> ++			break;
> ++		case OPT_DTB:
> ++			arm64_opts.dtb = optarg;
> ++			break;
> ++		case OPT_INITRD:
> ++			arm64_opts.initrd = optarg;
> ++			break;
> ++		case OPT_PANIC:
> ++			die("load-panic (-p) not supported");
> ++			break;
> ++		default:
> ++			break; /* Ignore core and unknown options. */
> ++		}
> ++	}
> ++
> ++	arm64_opts.command_line = concat_cmdline(cmdline, append);
> ++
> ++	dbgprintf("%s:%d: command_line: %s\n", __func__, __LINE__,
> ++		arm64_opts.command_line);
> ++	dbgprintf("%s:%d: initrd: %s\n", __func__, __LINE__,
> ++		arm64_opts.initrd);
> ++	dbgprintf("%s:%d: dtb: %s\n", __func__, __LINE__, arm64_opts.dtb);
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * struct dtb - Info about a binary device tree.
> ++ *
> ++ * @buf: Device tree data.
> ++ * @size: Device tree data size.
> ++ * @name: Shorthand name of this dtb for messages.
> ++ * @path: Filesystem path.
> ++ */
> ++
> ++struct dtb {
> ++	char *buf;
> ++	off_t size;
> ++	const char *name;
> ++	const char *path;
> ++};
> ++
> ++/**
> ++ * dump_reservemap - Dump the dtb's reservemap.
> ++ */
> ++
> ++static void dump_reservemap(const struct dtb *dtb)
> ++{
> ++	int i;
> ++
> ++	for (i = 0; ; i++) {
> ++		uint64_t address;
> ++		uint64_t size;
> ++
> ++		fdt_get_mem_rsv(dtb->buf, i, &address, &size);
> ++
> ++		if (!size)
> ++			break;
> ++
> ++		dbgprintf("%s: %s {%" PRIx64 ", %" PRIx64 "}\n",
__func__,
> ++			dtb->name, address, size);
> ++	}
> ++}
> ++
> ++/**
> ++ * set_bootargs - Set the dtb's bootargs.
> ++ */
> ++
> ++static int set_bootargs(struct dtb *dtb, const char *command_line)
> ++{
> ++	int result;
> ++
> ++	if (!command_line || !command_line[0])
> ++		return 0;
> ++
> ++	result = dtb_set_bootargs(&dtb->buf, &dtb->size, command_line);
> ++
> ++	if (result) {
> ++		fprintf(stderr,
> ++			"kexec: Set device tree bootargs failed.\n");
> ++		return -EFAILED;
> ++	}
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * read_proc_dtb - Read /proc/device-tree.
> ++ */
> ++
> ++static int read_proc_dtb(struct dtb *dtb)
> ++{
> ++	int result;
> ++	struct stat s;
> ++	static const char path[] = "/proc/device-tree";
> ++
> ++	result = stat(path, &s);
> ++
> ++	if (result) {
> ++		dbgprintf("%s: %s\n", __func__, strerror(errno));
> ++		return -EFAILED;
> ++	}
> ++
> ++	dtb->path = path;
> ++	create_flatten_tree((char **)&dtb->buf, &dtb->size, NULL);
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * read_sys_dtb - Read /sys/firmware/fdt.
> ++ */
> ++
> ++static int read_sys_dtb(struct dtb *dtb)
> ++{
> ++	int result;
> ++	struct stat s;
> ++	static const char path[] = "/sys/firmware/fdt";
> ++
> ++	result = stat(path, &s);
> ++
> ++	if (result) {
> ++		dbgprintf("%s: %s\n", __func__, strerror(errno));
> ++		return -EFAILED;
> ++	}
> ++
> ++	dtb->path = path;
> ++	dtb->buf = slurp_file(path, &dtb->size);
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * read_1st_dtb - Read the 1st stage kernel's dtb.
> ++ */
> ++
> ++static int read_1st_dtb(struct dtb *dtb)
> ++{
> ++	int result;
> ++
> ++	dtb->name = "dtb_sys";
> ++	result = read_sys_dtb(dtb);
> ++
> ++	if (!result)
> ++		goto on_success;
> ++
> ++	dtb->name = "dtb_proc";
> ++	result = read_proc_dtb(dtb);
> ++
> ++	if (!result)
> ++		goto on_success;
> ++
> ++	dbgprintf("%s: not found\n", __func__);
> ++	return -EFAILED;
> ++
> ++on_success:
> ++	dbgprintf("%s: found %s\n", __func__, dtb->path);
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * setup_2nd_dtb - Setup the 2nd stage kernel's dtb.
> ++ */
> ++
> ++static int setup_2nd_dtb(struct dtb *dtb, char *command_line)
> ++{
> ++	int result;
> ++
> ++	result = fdt_check_header(dtb->buf);
> ++
> ++	if (result) {
> ++		fprintf(stderr, "kexec: Invalid 2nd device tree.\n");
> ++		return -EFAILED;
> ++	}
> ++
> ++	result = set_bootargs(dtb, command_line);
> ++
> ++	dump_reservemap(dtb);
> ++
> ++	return result;
> ++}
> ++
> ++unsigned long arm64_locate_kernel_segment(struct kexec_info *info)
> ++{
> ++	unsigned long hole;
> ++
> ++	hole = locate_hole(info,
> ++		arm64_mem.text_offset + arm64_mem.image_size,
> ++		MiB(2), 0, ULONG_MAX, 1);
> ++
> ++	if (hole == ULONG_MAX)
> ++		dbgprintf("%s: locate_hole failed\n", __func__);
> ++
> ++	return hole;
> ++}
> ++
> ++/**
> ++ * arm64_load_other_segments - Prepare the dtb, initrd and purgatory segments.
> ++ */
> ++
> ++int arm64_load_other_segments(struct kexec_info *info,
> ++	unsigned long image_base)
> ++{
> ++	int result;
> ++	unsigned long dtb_base;
> ++	unsigned long hole_min;
> ++	unsigned long hole_max;
> ++	char *initrd_buf = NULL;
> ++	struct dtb dtb;
> ++	char command_line[COMMAND_LINE_SIZE] = "";
> ++
> ++	if (arm64_opts.command_line) {
> ++		strncpy(command_line, arm64_opts.command_line,
> ++			sizeof(command_line));
> ++		command_line[sizeof(command_line) - 1] = 0;
> ++	}
> ++
> ++	if (arm64_opts.dtb) {
> ++		dtb.name = "dtb_user";
> ++		dtb.buf = slurp_file(arm64_opts.dtb, &dtb.size);
> ++	} else {
> ++		result = read_1st_dtb(&dtb);
> ++
> ++		if (result) {
> ++			fprintf(stderr,
> ++				"kexec: Error: No device tree available.\n");
> ++			return -EFAILED;
> ++		}
> ++	}
> ++
> ++	result = setup_2nd_dtb(&dtb, command_line);
> ++
> ++	if (result)
> ++		return -EFAILED;
> ++
> ++	/* Put the other segments after the image. */
> ++
> ++	hole_min = image_base + arm64_mem.image_size;
> ++	hole_max = ULONG_MAX;
> ++
> ++	if (arm64_opts.initrd) {
> ++		initrd_buf = slurp_file(arm64_opts.initrd, &initrd_size);
> ++
> ++		if (!initrd_buf)
> ++			fprintf(stderr, "kexec: Empty ramdisk file.\n");
> ++		else {
> ++			/*
> ++			 * Put the initrd after the kernel.  As specified in
> ++			 * booting.txt, align to 1 GiB.
> ++			 */
> ++
> ++			initrd_base = add_buffer_phys_virt(info, initrd_buf,
> ++				initrd_size, initrd_size, GiB(1),
> ++				hole_min, hole_max, 1, 0);
> ++
> ++			/* initrd_base is valid if we got here. */
> ++
> ++			dbgprintf("initrd: base %lx, size %lxh (%ld)\n",
> ++				initrd_base, initrd_size, initrd_size);
> ++
> ++			/* Check size limit as specified in booting.txt. */
> ++
> ++			if (initrd_base - image_base + initrd_size > GiB(32)) {
> ++				fprintf(stderr, "kexec: Error: image + initrd too big.\n");
> ++				return -EFAILED;
> ++			}
> ++
> ++			result = dtb_set_initrd((char **)&dtb.buf,
> ++				&dtb.size, initrd_base,
> ++				initrd_base + initrd_size);
> ++
> ++			if (result)
> ++				return -EFAILED;
> ++		}
> ++	}
> ++
> ++	/* Check size limit as specified in booting.txt. */
> ++
> ++	if (dtb.size > MiB(2)) {
> ++		fprintf(stderr, "kexec: Error: dtb too big.\n");
> ++		return -EFAILED;
> ++	}
> ++
> ++	dtb_base = add_buffer_phys_virt(info, dtb.buf, dtb.size, dtb.size,
> ++		0, hole_min, hole_max, 1, 0);
> ++
> ++	/* dtb_base is valid if we got here. */
> ++
> ++	dbgprintf("dtb:    base %lx, size %lxh (%ld)\n", dtb_base, dtb.size,
> ++		dtb.size);
> ++
> ++	elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,
> ++		hole_min, hole_max, 1, 0);
> ++
> ++	info->entry = (void *)elf_rel_get_addr(&info->rhdr,
"purgatory_start");
> ++
> ++	elf_rel_set_symbol(&info->rhdr, "arm64_kernel_entry",
&image_base,
> ++		sizeof(image_base));
> ++
> ++	elf_rel_set_symbol(&info->rhdr, "arm64_dtb_addr", &dtb_base,
> ++		sizeof(dtb_base));
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * virt_to_phys - For processing elf file values.
> ++ */
> ++
> ++unsigned long virt_to_phys(unsigned long v)
> ++{
> ++	unsigned long p;
> ++
> ++	p = v - get_vp_offset() + get_phys_offset();
> ++
> ++	return p;
> ++}
> ++
> ++/**
> ++ * phys_to_virt - For crashdump setup.
> ++ */
> ++
> ++unsigned long phys_to_virt(struct crash_elf_info *elf_info,
> ++	unsigned long long p)
> ++{
> ++	unsigned long v;
> ++
> ++	v = p - get_phys_offset() + elf_info->page_offset;
> ++
> ++	return v;
> ++}
> ++
> ++/**
> ++ * add_segment - Use virt_to_phys when loading elf files.
> ++ */
> ++
> ++void add_segment(struct kexec_info *info, const void *buf, size_t bufsz,
> ++	unsigned long base, size_t memsz)
> ++{
> ++	add_segment_phys_virt(info, buf, bufsz, base, memsz, 1);
> ++}
> ++
> ++/**
> ++ * get_memory_ranges_iomem_cb - Helper for get_memory_ranges_iomem.
> ++ */
> ++
> ++static int get_memory_ranges_iomem_cb(void *data, int nr, char *str,
> ++	unsigned long long base, unsigned long long length)
> ++{
> ++	struct memory_range *r;
> ++
> ++	if (nr >= KEXEC_SEGMENT_MAX)
> ++		return -1;
> ++
> ++	r = (struct memory_range *)data + nr;
> ++	r->type = RANGE_RAM;
> ++	r->start = base;
> ++	r->end = base + length - 1;
> ++
> ++	set_phys_offset(r->start);
> ++
> ++	dbgprintf("%s: %016llx - %016llx : %s", __func__, r->start,
> ++		r->end, str);
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * get_memory_ranges_iomem - Try to get the memory ranges from /proc/iomem.
> ++ */
> ++
> ++static int get_memory_ranges_iomem(struct memory_range *array,
> ++	unsigned int *count)
> ++{
> ++	*count = kexec_iomem_for_each_line("System RAM\n",
> ++		get_memory_ranges_iomem_cb, array);
> ++
> ++	if (!*count) {
> ++		dbgprintf("%s: failed: No RAM found.\n", __func__);
> ++		return -EFAILED;
> ++	}
> ++
> ++	return 0;
> ++}
> ++
> ++/**
> ++ * get_memory_ranges - Try to get the memory ranges some how.
> ++ */
> ++
> ++int get_memory_ranges(struct memory_range **range, int *ranges,
> ++	unsigned long kexec_flags)
> ++{
> ++	static struct memory_range array[KEXEC_SEGMENT_MAX];
> ++	unsigned int count;
> ++	int result;
> ++
> ++	result = get_memory_ranges_iomem(array, &count);
> ++
> ++	*range = result ? NULL : array;
> ++	*ranges = result ? 0 : count;
> ++
> ++	return result;
> ++}
> ++
> ++int arch_compat_trampoline(struct kexec_info *info)
> ++{
> ++	return 0;
> ++}
> ++
> ++int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> ++{
> ++	return (ehdr->e_machine == EM_AARCH64);
> ++}
> ++
> ++void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *UNUSED(sym),
> ++	unsigned long r_type, void *ptr, unsigned long address,
> ++	unsigned long value)
> ++{
> ++#if !defined(R_AARCH64_ABS64)
> ++# define R_AARCH64_ABS64 257
> ++#endif
> ++
> ++#if !defined(R_AARCH64_LD_PREL_LO19)
> ++# define R_AARCH64_LD_PREL_LO19 273
> ++#endif
> ++
> ++#if !defined(R_AARCH64_ADR_PREL_LO21)
> ++# define R_AARCH64_ADR_PREL_LO21 274
> ++#endif
> ++
> ++#if !defined(R_AARCH64_JUMP26)
> ++# define R_AARCH64_JUMP26 282
> ++#endif
> ++
> ++#if !defined(R_AARCH64_CALL26)
> ++# define R_AARCH64_CALL26 283
> ++#endif
> ++
> ++	uint64_t *loc64;
> ++	uint32_t *loc32;
> ++	uint64_t *location = (uint64_t *)ptr;
> ++	uint64_t data = *location;
> ++	const char *type = NULL;
> ++
> ++	switch(r_type) {
> ++	case R_AARCH64_ABS64:
> ++		type = "ABS64";
> ++		loc64 = ptr;
> ++		*loc64 = cpu_to_elf64(ehdr, elf64_to_cpu(ehdr, *loc64) + value);
> ++		break;
> ++	case R_AARCH64_LD_PREL_LO19:
> ++		type = "LD_PREL_LO19";
> ++		loc32 = ptr;
> ++		*loc32 = cpu_to_le32(le32_to_cpu(*loc32)
> ++			+ (((value - address) << 3) & 0xffffe0));
> ++		break;
> ++	case R_AARCH64_ADR_PREL_LO21:
> ++		if (value & 3)
> ++			die("%s: ERROR Unaligned value: %lx\n", __func__,
> ++				value);
> ++		type = "ADR_PREL_LO21";
> ++		loc32 = ptr;
> ++		*loc32 = cpu_to_le32(le32_to_cpu(*loc32)
> ++			+ (((value - address) << 3) & 0xffffe0));
> ++		break;
> ++	case R_AARCH64_JUMP26:
> ++		type = "JUMP26";
> ++		loc32 = ptr;
> ++		*loc32 = cpu_to_le32(le32_to_cpu(*loc32)
> ++			+ (((value - address) >> 2) & 0x3ffffff));
> ++		break;
> ++	case R_AARCH64_CALL26:
> ++		type = "CALL26";
> ++		loc32 = ptr;
> ++		*loc32 = cpu_to_le32(le32_to_cpu(*loc32)
> ++			+ (((value - address) >> 2) & 0x3ffffff));
> ++		break;
> ++	default:
> ++		die("%s: ERROR Unknown type: %lu\n", __func__, r_type);
> ++		break;
> ++	}
> ++
> ++	dbgprintf("%s: %s %016lx->%016lx\n", __func__, type, data,
*location);
> ++}
> ++
> ++void arch_reuse_initrd(void)
> ++{
> ++	reuse_initrd = 1;
> ++}
> ++
> ++void arch_update_purgatory(struct kexec_info *UNUSED(info))
> ++{
> ++}
> +diff --git a/kexec/arch/arm64/kexec-arm64.h b/kexec/arch/arm64/kexec-arm64.h
> +new file mode 100644
> +index 0000000..bac62f8
> +--- /dev/null
> ++++ b/kexec/arch/arm64/kexec-arm64.h
> +@@ -0,0 +1,71 @@
> ++/*
> ++ * ARM64 kexec.
> ++ */
> ++
> ++#if !defined(KEXEC_ARM64_H)
> ++#define KEXEC_ARM64_H
> ++
> ++#include <stdbool.h>
> ++#include <sys/types.h>
> ++
> ++#include "image-header.h"
> ++#include "kexec.h"
> ++
> ++#define KEXEC_SEGMENT_MAX 16
> ++
> ++#define BOOT_BLOCK_VERSION 17
> ++#define BOOT_BLOCK_LAST_COMP_VERSION 16
> ++#define COMMAND_LINE_SIZE 512
> ++
> ++#define KiB(x) ((x) * 1024UL)
> ++#define MiB(x) (KiB(x) * 1024UL)
> ++#define GiB(x) (MiB(x) * 1024UL)
> ++
> ++int elf_arm64_probe(const char *kernel_buf, off_t kernel_size);
> ++int elf_arm64_load(int argc, char **argv, const char *kernel_buf,
> ++	off_t kernel_size, struct kexec_info *info);
> ++void elf_arm64_usage(void);
> ++
> ++int image_arm64_probe(const char *kernel_buf, off_t kernel_size);
> ++int image_arm64_load(int argc, char **argv, const char *kernel_buf,
> ++	off_t kernel_size, struct kexec_info *info);
> ++void image_arm64_usage(void);
> ++
> ++off_t initrd_base;
> ++off_t initrd_size;
> ++
> ++/**
> ++ * struct arm64_mem - Memory layout info.
> ++ */
> ++
> ++struct arm64_mem {
> ++	uint64_t phys_offset;
> ++	uint64_t text_offset;
> ++	uint64_t image_size;
> ++	uint64_t vp_offset;
> ++};
> ++
> ++#define arm64_mem_ngv UINT64_MAX
> ++struct arm64_mem arm64_mem;
> ++
> ++uint64_t get_phys_offset(void);
> ++uint64_t get_vp_offset(void);
> ++
> ++static inline void reset_vp_offset(void)
> ++{
> ++	arm64_mem.vp_offset = arm64_mem_ngv;
> ++}
> ++
> ++static inline void set_phys_offset(uint64_t v)
> ++{
> ++	if (arm64_mem.phys_offset == arm64_mem_ngv
> ++		|| v < arm64_mem.phys_offset)
> ++		arm64_mem.phys_offset = v;
> ++}
> ++
> ++int arm64_process_image_header(const struct arm64_image_header *h);
> ++unsigned long arm64_locate_kernel_segment(struct kexec_info *info);
> ++int arm64_load_other_segments(struct kexec_info *info,
> ++	unsigned long image_base);
> ++
> ++#endif
> +diff --git a/kexec/arch/arm64/kexec-elf-arm64.c
b/kexec/arch/arm64/kexec-elf-arm64.c
> +new file mode 100644
> +index 0000000..daf8bf0
> +--- /dev/null
> ++++ b/kexec/arch/arm64/kexec-elf-arm64.c
> +@@ -0,0 +1,146 @@
> ++/*
> ++ * ARM64 kexec elf support.
> ++ */
> ++
> ++#define _GNU_SOURCE
> ++
> ++#include <errno.h>
> ++#include <limits.h>
> ++#include <stdlib.h>
> ++#include <linux/elf.h>
> ++
> ++#include "kexec-arm64.h"
> ++#include "kexec-elf.h"
> ++#include "kexec-syscall.h"
> ++
> ++int elf_arm64_probe(const char *kernel_buf, off_t kernel_size)
> ++{
> ++	struct mem_ehdr ehdr;
> ++	int result;
> ++
> ++	result = build_elf_exec_info(kernel_buf, kernel_size, &ehdr, 0);
> ++
> ++	if (result < 0) {
> ++		dbgprintf("%s: Not an ELF executable.\n", __func__);
> ++		goto on_exit;
> ++	}
> ++
> ++	if (ehdr.e_machine != EM_AARCH64) {
> ++		dbgprintf("%s: Not an AARCH64 ELF executable.\n", __func__);
> ++		result = -1;
> ++		goto on_exit;
> ++	}
> ++
> ++	result = 0;
> ++on_exit:
> ++	free_elf_info(&ehdr);
> ++	return result;
> ++}
> ++
> ++int elf_arm64_load(int argc, char **argv, const char *kernel_buf,
> ++	off_t kernel_size, struct kexec_info *info)
> ++{
> ++	const struct arm64_image_header *header = NULL;
> ++	unsigned long kernel_segment;
> ++	struct mem_ehdr ehdr;
> ++	int result;
> ++	int i;
> ++
> ++	if (info->kexec_flags & KEXEC_ON_CRASH) {
> ++		fprintf(stderr, "kexec: kdump not yet supported on arm64\n");
> ++		return -EFAILED;
> ++	}
> ++
> ++	result = build_elf_exec_info(kernel_buf, kernel_size, &ehdr, 0);
> ++
> ++	if (result < 0) {
> ++		dbgprintf("%s: build_elf_exec_info failed\n", __func__);
> ++		goto exit;
> ++	}
> ++
> ++	/* Find and process the arm64 image header. */
> ++
> ++	for (i = 0; i < ehdr.e_phnum; i++) {
> ++		struct mem_phdr *phdr = &ehdr.e_phdr[i];
> ++		unsigned long header_offset;
> ++
> ++		if (phdr->p_type != PT_LOAD)
> ++			continue;
> ++
> ++		/*
> ++		 * When CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET=y the image header
> ++		 * could be offset in the elf segment.  The linker script sets
> ++		 * ehdr.e_entry to the start of text.
> ++		 */
> ++
> ++		header_offset = ehdr.e_entry - phdr->p_vaddr;
> ++
> ++		header = (const struct arm64_image_header *)(
> ++			kernel_buf + phdr->p_offset + header_offset);
> ++
> ++		if (!arm64_process_image_header(header)) {
> ++			dbgprintf("%s: e_entry:        %016llx\n", __func__,
> ++				ehdr.e_entry);
> ++			dbgprintf("%s: p_vaddr:        %016llx\n", __func__,
> ++				phdr->p_vaddr);
> ++			dbgprintf("%s: header_offset:  %016lx\n", __func__,
> ++				header_offset);
> ++
> ++			break;
> ++		}
> ++	}
> ++
> ++	if (i == ehdr.e_phnum) {
> ++		dbgprintf("%s: Valid arm64 header not found\n", __func__);
> ++		result = -EFAILED;
> ++		goto exit;
> ++	}
> ++
> ++	kernel_segment = arm64_locate_kernel_segment(info);
> ++
> ++	if (kernel_segment == ULONG_MAX) {
> ++		dbgprintf("%s: Kernel segment is not allocated\n", __func__);
> ++		result = -EFAILED;
> ++		goto exit;
> ++	}
> ++
> ++	arm64_mem.vp_offset = _ALIGN_DOWN(ehdr.e_entry, MiB(2));
> ++	arm64_mem.vp_offset -= kernel_segment - get_phys_offset();
> ++
> ++	dbgprintf("%s: kernel_segment: %016lx\n", __func__, kernel_segment);
> ++	dbgprintf("%s: text_offset:    %016lx\n", __func__,
> ++		arm64_mem.text_offset);
> ++	dbgprintf("%s: image_size:     %016lx\n", __func__,
> ++		arm64_mem.image_size);
> ++	dbgprintf("%s: phys_offset:    %016lx\n", __func__,
> ++		arm64_mem.phys_offset);
> ++	dbgprintf("%s: vp_offset:      %016lx\n", __func__,
> ++		arm64_mem.vp_offset);
> ++	dbgprintf("%s: PE format:      %s\n", __func__,
> ++		(arm64_header_check_pe_sig(header) ? "yes" : "no"));
> ++
> ++	/* load the kernel */
> ++	result = elf_exec_load(&ehdr, info);
> ++
> ++	if (result) {
> ++		dbgprintf("%s: elf_exec_load failed\n", __func__);
> ++		goto exit;
> ++	}
> ++
> ++	result = arm64_load_other_segments(info, kernel_segment
> ++		+ arm64_mem.text_offset);
> ++
> ++exit:
> ++	reset_vp_offset();
> ++	free_elf_info(&ehdr);
> ++	if (result)
> ++		fprintf(stderr, "kexec: Bad elf image file, load failed.\n");
> ++	return result;
> ++}
> ++
> ++void elf_arm64_usage(void)
> ++{
> ++	printf(
> ++"     An ARM64 ELF image, big or little endian.\n"
> ++"     Typically vmlinux or a stripped version of vmlinux.\n\n");
> ++}
> +diff --git a/kexec/arch/arm64/kexec-image-arm64.c
b/kexec/arch/arm64/kexec-image-arm64.c
> +new file mode 100644
> +index 0000000..42d2ea7
> +--- /dev/null
> ++++ b/kexec/arch/arm64/kexec-image-arm64.c
> +@@ -0,0 +1,41 @@
> ++/*
> ++ * ARM64 kexec binary image support.
> ++ */
> ++
> ++#define _GNU_SOURCE
> ++#include "kexec-arm64.h"
> ++
> ++int image_arm64_probe(const char *kernel_buf, off_t kernel_size)
> ++{
> ++	const struct arm64_image_header *h;
> ++
> ++	if (kernel_size < sizeof(struct arm64_image_header)) {
> ++		dbgprintf("%s: No arm64 image header.\n", __func__);
> ++		return -1;
> ++	}
> ++
> ++	h = (const struct arm64_image_header *)(kernel_buf);
> ++
> ++	if (!arm64_header_check_magic(h)) {
> ++		dbgprintf("%s: Bad arm64 image header.\n", __func__);
> ++		return -1;
> ++	}
> ++
> ++	fprintf(stderr, "kexec: ARM64 binary image files are currently NOT
SUPPORTED.\n");
> ++	return -1;
> ++}
> ++
> ++int image_arm64_load(int argc, char **argv, const char *kernel_buf,
> ++	off_t kernel_size, struct kexec_info *info)
> ++{
> ++	return -1;
> ++}
> ++
> ++void image_arm64_usage(void)
> ++{
> ++	printf(
> ++"     An ARM64 binary image, compressed or not, big or little endian.\n"
> ++"     Typically an Image, Image.gz or Image.lzma file.\n\n");
> ++	printf(
> ++"     ARM64 binary image files are currently NOT SUPPORTED.\n\n");
> ++}
> +diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
> +index ce2e20b..c0d0bea 100644
> +--- a/kexec/kexec-syscall.h
> ++++ b/kexec/kexec-syscall.h
> +@@ -39,8 +39,8 @@
> + #ifdef __s390__
> + #define __NR_kexec_load		277
> + #endif
> +-#ifdef __arm__
> +-#define __NR_kexec_load		__NR_SYSCALL_BASE + 347  
> ++#if defined(__arm__) || defined(__arm64__)
> ++#define __NR_kexec_load		__NR_SYSCALL_BASE + 347
> + #endif
> + #if defined(__mips__)
> + #define __NR_kexec_load                4311
> +@@ -108,6 +108,7 @@ static inline long kexec_file_load(int kernel_fd, int
initrd_fd,
> + #define KEXEC_ARCH_PPC64   (21 << 16)
> + #define KEXEC_ARCH_IA_64   (50 << 16)
> + #define KEXEC_ARCH_ARM     (40 << 16)
> ++#define KEXEC_ARCH_ARM64   (183 << 16)
> + #define KEXEC_ARCH_S390    (22 << 16)
> + #define KEXEC_ARCH_SH      (42 << 16)
> + #define KEXEC_ARCH_MIPS_LE (10 << 16)
> +@@ -153,5 +154,8 @@ static inline long kexec_file_load(int kernel_fd, int
initrd_fd,
> + #ifdef __m68k__
> + #define KEXEC_ARCH_NATIVE	KEXEC_ARCH_68K
> + #endif
> ++#if defined(__arm64__)
> ++#define KEXEC_ARCH_NATIVE	KEXEC_ARCH_ARM64
> ++#endif
> + 
> + #endif /* KEXEC_SYSCALL_H */
> +diff --git a/purgatory/Makefile b/purgatory/Makefile
> +index 2b5c061..ca0443c 100644
> +--- a/purgatory/Makefile
> ++++ b/purgatory/Makefile
> +@@ -19,6 +19,7 @@ dist += purgatory/Makefile $(PURGATORY_SRCS)				\
> + 
> + include $(srcdir)/purgatory/arch/alpha/Makefile
> + include $(srcdir)/purgatory/arch/arm/Makefile
> ++include $(srcdir)/purgatory/arch/arm64/Makefile
> + include $(srcdir)/purgatory/arch/i386/Makefile
> + include $(srcdir)/purgatory/arch/ia64/Makefile
> + include $(srcdir)/purgatory/arch/mips/Makefile
> +diff --git a/purgatory/arch/arm64/Makefile b/purgatory/arch/arm64/Makefile
> +new file mode 100644
> +index 0000000..636abea
> +--- /dev/null
> ++++ b/purgatory/arch/arm64/Makefile
> +@@ -0,0 +1,18 @@
> ++
> ++arm64_PURGATORY_EXTRA_CFLAGS = \
> ++	-mcmodel=large \
> ++	-fno-stack-protector \
> ++	-fno-asynchronous-unwind-tables \
> ++	-Wundef \
> ++	-Werror-implicit-function-declaration \
> ++	-Wdeclaration-after-statement \
> ++	-Werror=implicit-int \
> ++	-Werror=strict-prototypes
> ++
> ++arm64_PURGATORY_SRCS += \
> ++	purgatory/arch/arm64/entry.S \
> ++	purgatory/arch/arm64/purgatory-arm64.c
> ++
> ++dist += \
> ++	$(arm64_PURGATORY_SRCS) \
> ++	purgatory/arch/arm64/Makefile
> +diff --git a/purgatory/arch/arm64/entry.S b/purgatory/arch/arm64/entry.S
> +new file mode 100644
> +index 0000000..adf16f4
> +--- /dev/null
> ++++ b/purgatory/arch/arm64/entry.S
> +@@ -0,0 +1,51 @@
> ++/*
> ++ * ARM64 purgatory.
> ++ */
> ++
> ++.macro	size, sym:req
> ++	.size \sym, . - \sym
> ++.endm
> ++
> ++.text
> ++
> ++.globl purgatory_start
> ++purgatory_start:
> ++
> ++	adr	x19, .Lstack
> ++	mov	sp, x19
> ++
> ++	bl	purgatory
> ++
> ++	/* Start new image. */
> ++	ldr	x17, arm64_kernel_entry
> ++	ldr	x0, arm64_dtb_addr
> ++	mov	x1, xzr
> ++	mov	x2, xzr
> ++	mov	x3, xzr
> ++	br	x17
> ++
> ++size purgatory_start
> ++
> ++.ltorg
> ++
> ++.align 4
> ++	.rept	256
> ++	.quad	0
> ++	.endr
> ++.Lstack:
> ++
> ++.data
> ++
> ++.align 3
> ++
> ++.globl arm64_kernel_entry
> ++arm64_kernel_entry:
> ++	.quad	0
> ++size arm64_kernel_entry
> ++
> ++.globl arm64_dtb_addr
> ++arm64_dtb_addr:
> ++	.quad	0
> ++size arm64_dtb_addr
> ++
> ++.end
> +\ No newline at end of file
> +diff --git a/purgatory/arch/arm64/purgatory-arm64.c
b/purgatory/arch/arm64/purgatory-arm64.c
> +new file mode 100644
> +index 0000000..fe50fcf
> +--- /dev/null
> ++++ b/purgatory/arch/arm64/purgatory-arm64.c
> +@@ -0,0 +1,19 @@
> ++/*
> ++ * ARM64 purgatory.
> ++ */
> ++
> ++#include <stdint.h>
> ++#include <purgatory.h>
> ++
> ++void putchar(int ch)
> ++{
> ++	/* Nothing for now */
> ++}
> ++
> ++void post_verification_setup_arch(void)
> ++{
> ++}
> ++
> ++void setup_arch(void)
> ++{
> ++}
> +-- 
> +2.9.3
> +
> diff --git a/0003-arm64-Add-support-for-binary-image-files.patch
b/0003-arm64-Add-support-for-binary-image-files.patch
> new file mode 100644
> index 0000000..8e8dde0
> --- /dev/null
> +++ b/0003-arm64-Add-support-for-binary-image-files.patch
> @@ -0,0 +1,96 @@
> +From abdfe97736f89d9bc73662b9134604b0229a599e Mon Sep 17 00:00:00 2001
> +From: Pratyush Anand <panand(a)redhat.com&gt;
> +Date: Wed, 21 Sep 2016 18:14:25 +0000
> +Subject: [PATCH 3/3] arm64: Add support for binary image files
> +
> +Signed-off-by: Pratyush Anand <panand(a)redhat.com&gt;
> +[Reworked and cleaned up]
> +Signed-off-by: Geoff Levand <geoff(a)infradead.org&gt;
> +Tested-By: Pratyush Anand <panand(a)redhat.com&gt;
> +Tested-By: Matthias Brugger <mbrugger(a)suse.com&gt;
> +Signed-off-by: Simon Horman <horms(a)verge.net.au&gt;
> +---
> + kexec/arch/arm64/kexec-image-arm64.c | 49 ++++++++++++++++++++++++++++++++----
> + 1 file changed, 44 insertions(+), 5 deletions(-)
> +
> +diff --git a/kexec/arch/arm64/kexec-image-arm64.c
b/kexec/arch/arm64/kexec-image-arm64.c
> +index 42d2ea7..960ed96 100644
> +--- a/kexec/arch/arm64/kexec-image-arm64.c
> ++++ b/kexec/arch/arm64/kexec-image-arm64.c
> +@@ -3,7 +3,9 @@
> +  */
> + 
> + #define _GNU_SOURCE
> ++
> + #include "kexec-arm64.h"
> ++#include <limits.h>
> + 
> + int image_arm64_probe(const char *kernel_buf, off_t kernel_size)
> + {
> +@@ -21,14 +23,53 @@ int image_arm64_probe(const char *kernel_buf, off_t
kernel_size)
> + 		return -1;
> + 	}
> + 
> +-	fprintf(stderr, "kexec: ARM64 binary image files are currently NOT
SUPPORTED.\n");
> +-	return -1;
> ++	return 0;
> + }
> + 
> + int image_arm64_load(int argc, char **argv, const char *kernel_buf,
> + 	off_t kernel_size, struct kexec_info *info)
> + {
> +-	return -1;
> ++	const struct arm64_image_header *header;
> ++	unsigned long kernel_segment;
> ++	int result;
> ++
> ++	header = (const struct arm64_image_header *)(kernel_buf);
> ++
> ++	if (arm64_process_image_header(header))
> ++		return -1;
> ++
> ++        kernel_segment = arm64_locate_kernel_segment(info);
> ++
> ++        if (kernel_segment == ULONG_MAX) {
> ++                dbgprintf("%s: Kernel segment is not allocated\n",
__func__);
> ++                result = -EFAILED;
> ++                goto exit;
> ++        }
> ++
> ++	dbgprintf("%s: kernel_segment: %016lx\n", __func__, kernel_segment);
> ++	dbgprintf("%s: text_offset:    %016lx\n", __func__,
> ++		arm64_mem.text_offset);
> ++	dbgprintf("%s: image_size:     %016lx\n", __func__,
> ++		arm64_mem.image_size);
> ++	dbgprintf("%s: phys_offset:    %016lx\n", __func__,
> ++		arm64_mem.phys_offset);
> ++	dbgprintf("%s: vp_offset:      %016lx\n", __func__,
> ++		arm64_mem.vp_offset);
> ++	dbgprintf("%s: PE format:      %s\n", __func__,
> ++		(arm64_header_check_pe_sig(header) ? "yes" : "no"));
> ++
> ++	/* load the kernel */
> ++	add_segment_phys_virt(info, kernel_buf, kernel_size,
> ++			kernel_segment + arm64_mem.text_offset,
> ++			arm64_mem.image_size, 0);
> ++
> ++	result = arm64_load_other_segments(info, kernel_segment
> ++		+ arm64_mem.text_offset);
> ++
> ++exit:
> ++        if (result)
> ++                fprintf(stderr, "kexec: load failed.\n");
> ++        return result;
> + }
> + 
> + void image_arm64_usage(void)
> +@@ -36,6 +77,4 @@ void image_arm64_usage(void)
> + 	printf(
> + "     An ARM64 binary image, compressed or not, big or little endian.\n"
> + "     Typically an Image, Image.gz or Image.lzma file.\n\n");
> +-	printf(
> +-"     ARM64 binary image files are currently NOT SUPPORTED.\n\n");
> + }
> +-- 
> +2.9.3
> +
> diff --git a/kexec-tools.spec b/kexec-tools.spec
> index cd26ec3..985fd2d 100644
> --- a/kexec-tools.spec
> +++ b/kexec-tools.spec
> @@ -1,9 +1,10 @@
>  Name: kexec-tools
>  Version: 2.0.13
> -Release: 5%{?dist}
> +Release: 6%{?dist}
>  License: GPLv2
>  Group: Applications/System
>  Summary: The kexec/kdump userspace component
> +
>  Source0: http://kernel.org/pub/linux/utils/kernel/kexec/%{name}-%{version}.tar.xz
>  Source1: kdumpctl
>  Source2: kdump.sysconfig
> @@ -50,14 +51,13 @@ Requires: dracut-network, ethtool
>  BuildRequires: zlib-devel zlib zlib-static elfutils-devel-static glib2-devel
bzip2-devel ncurses-devel bison flex lzo-devel snappy-devel
>  BuildRequires: pkgconfig intltool gettext 
>  BuildRequires: systemd-units
> +BuildRequires: automake autoconf libtool
>  %ifarch %{ix86} x86_64 ppc64 ppc s390x ppc64le
>  Obsoletes: diskdumputils netdump kexec-tools-eppic
>  %endif
>  
>  %undefine _hardened_build
>  
> -ExcludeArch: aarch64
> -
>  #START INSERT
>  
>  #
> @@ -76,8 +76,12 @@ ExcludeArch: aarch64
>  # Patches 401 through 500 are meant for s390 kexec-tools enablement
>  #
>  #
> -# Patches 501 through 600 are meant for ppc kexec-tools enablement
> +# Patches 501 through 600 are meant for ARM kexec-tools enablement
>  #
> +# kexec v5 - http://lists.infradead.org/pipermail/kexec/2016-September/017110.html
> +Patch500: 0001-kexec-Add-common-device-tree-routines.patch
> +Patch501: 0002-arm64-Add-arm64-kexec-support.patch
> +Patch502: 0003-arm64-Add-support-for-binary-image-files.patch
>  
>  #
>  # Patches 601 onward are generic patches
> @@ -107,6 +111,9 @@ tar -z -x -v -f %{SOURCE9}
>  tar -z -x -v -f %{SOURCE19}
>  tar -z -x -v -f %{SOURCE23}
>  
> +%patch500 -p1
> +%patch501 -p1
> +%patch502 -p1
>  
>  %patch601 -p1
>  %patch602 -p1
> @@ -117,7 +124,7 @@ tar -z -x -v -f %{SOURCE23}
>  %endif
>  
>  %build
> -
> +autoreconf
>  %configure \
>  %ifarch ppc64
>      --host=powerpc64-redhat-linux-gnu \
> @@ -315,6 +322,9 @@ done
>  %doc
>  
>  %changelog
> +* Mon Sep 19 2016 Peter Robinson <pbrobinson(a)fedoraproject.org&gt; 2.0.13-6
> +- Add initial upstream support for kexec on aarch64
> +
>  * Fri Sep 16 2016 Dave Young <dyoung(a)redhat.com&gt; - 2.0.13-5
>  - Fix bug 1373958 for system boot without initrd
>  - Do not depend on /etc/fstab in kdumpctl in case it does not exist
> -- 
> 2.9.3
> 

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Re: [F25 PATCH]: Add initial upstream support for kexec on aarch64