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kexec-tools/kexec-tools-enable-aarch64.patch

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From: Geoff Levand <geoff@infradead.org>
Date: Mon, 15 Jul 2013 23:32:36 +0000 (-0700)
Subject: Add arm64 support
Git-repo: https://git.linaro.org/people/geoff.levand/kexec-tools.git
Git-commit: 44a50d00fa02dbb43d19a267039b53422a11eb6
Signed-off-by: Dirk Müller <dmueller@suse.com>
Add arm64 support
Signed-off-by: Geoff Levand <geoff@infradead.org>
diff --git a/configure.ac b/configure.ac
index 31d1bbe..c6e8bd6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,6 +35,9 @@ case $target_cpu in
ARCH="ppc64"
SUBARCH="LE"
;;
+ aarch64 )
+ ARCH="arm64"
+ ;;
arm* )
ARCH="arm"
;;
diff --git a/kexec/Makefile b/kexec/Makefile
index 7d3175b..9777ec3 100644
--- a/kexec/Makefile
+++ b/kexec/Makefile
@@ -71,6 +71,7 @@ KEXEC_SRCS += $($(ARCH)_FS2DT)
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..8b7f8a5
--- /dev/null
+++ b/kexec/arch/arm64/Makefile
@@ -0,0 +1,17 @@
+
+arm64_FS2DT += kexec/fs2dt.c
+arm64_FS2DT_INCLUDE += -include $(srcdir)/kexec/arch/arm64/kexec-arm64.h
+
+arm64_KEXEC_SRCS += \
+ kexec/arch/arm64/kexec-arm64.c \
+ kexec/arch/arm64/kexec-elf-arm64.c
+
+arm64_ARCH_REUSE_INITRD =
+arm64_ADD_SEGMENT =
+arm64_VIRT_TO_PHYS =
+
+dist += $(arm64_KEXEC_SRCS) \
+ kexec/arch/arm64/Makefile \
+ kexec/arch/arm64/kexec-arm64.h
+
+LIBS += -lfdt
diff --git a/kexec/arch/arm64/include/arch/options.h b/kexec/arch/arm64/include/arch/options.h
new file mode 100644
index 0000000..c9a0287
--- /dev/null
+++ b/kexec/arch/arm64/include/arch/options.h
@@ -0,0 +1,30 @@
+#ifndef KEXEC_ARCH_ARM64_OPTIONS_H
+#define KEXEC_ARCH_ARM64_OPTIONS_H
+
+#define OPT_APPEND ((OPT_MAX)+0)
+#define OPT_RAMDISK ((OPT_MAX)+1)
+#define OPT_DTB ((OPT_MAX)+2)
+#define OPT_ARCH_MAX ((OPT_MAX)+3)
+
+#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_RAMDISK }, \
+ { "ramdisk", 1, NULL, OPT_RAMDISK }, \
+
+#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
+
+struct arm64_opts {
+ const char *command_line;
+ const char *ramdisk;
+ const char *dtb;
+};
+
+struct arm64_opts arm64_opts;
+
+#endif /* KEXEC_ARCH_ARM64_OPTIONS_H */
diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
new file mode 100644
index 0000000..e02c38d
--- /dev/null
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -0,0 +1,228 @@
+/*
+ * ARM64 kexec support.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+
+//#include <linux/kexec.h>
+
+#include "../../kexec.h"
+#include "../../kexec-syscall.h"
+#include "kexec-arm64.h"
+#include "arch/options.h"
+
+/* Global varables the core kexec routines expect. */
+
+unsigned char reuse_initrd;
+off_t initrd_base = 0;
+off_t initrd_size = 0;
+
+struct memory_ranges usablemem_rgns = {
+};
+
+const struct arch_map_entry arches[] = {
+ { "aarch64", KEXEC_ARCH_ARM64 },
+ { NULL, 0 },
+};
+
+/* arm64 global varables. */
+
+struct arm64_opts arm64_opts;
+
+void arch_usage(void)
+{
+ fprintf(stderr, "%s:%d: ->\n", __func__, __LINE__);
+
+ printf(
+" --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");
+
+ fprintf(stderr, "%s:%d: <-\n", __func__, __LINE__);
+}
+
+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;
+
+ for (opt = 0; opt != -1; ) {
+ opt = getopt_long(argc, argv, short_options, options, 0);
+
+ switch (opt) {
+ case OPT_APPEND:
+ arm64_opts.command_line = optarg;
+ break;
+ case OPT_RAMDISK:
+ arm64_opts.ramdisk = optarg;
+ break;
+ case OPT_DTB:
+ arm64_opts.dtb = optarg;
+ break;
+ default:
+ break; /* Ignore core and unknown options */
+ }
+ }
+
+ dbgprintf("%s:%d: command_line: %s\n", __func__, __LINE__,
+ arm64_opts.command_line);
+ dbgprintf("%s:%d: ramdisk: %s\n", __func__, __LINE__,
+ arm64_opts.ramdisk);
+ dbgprintf("%s:%d: dtb: %s\n", __func__, __LINE__, arm64_opts.dtb);
+
+ return 0;
+}
+
+int is_crashkernel_mem_reserved(void)
+{
+ return 0; /* TODO: kdump not implemented yet. */
+}
+
+void arch_reuse_initrd(void)
+{
+ reuse_initrd = 1;
+}
+
+void arch_update_purgatory(struct kexec_info *UNUSED(info))
+{
+ fprintf(stderr, "%s:%d: do\n", __func__, __LINE__);
+}
+
+unsigned long virt_to_phys(unsigned long addr)
+{
+ fprintf(stderr, "%s:%d: %016lx -> %016lx\n", __func__, __LINE__, addr,
+ addr + 0x080000000UL);
+ return addr + 0x080000000UL;
+}
+
+void add_segment(struct kexec_info *info, const void *buf, size_t bufsz,
+ unsigned long base, size_t memsz)
+{
+ fprintf(stderr, "%s:%d: ->\n", __func__, __LINE__);
+ add_segment_phys_virt(info, buf, bufsz, base, memsz, 1);
+ fprintf(stderr, "%s:%d: <-\n", __func__, __LINE__);
+}
+
+static int get_memory_ranges_1(struct memory_range **range, int *ranges,
+ unsigned long kexec_flags)
+{
+ static struct memory_range memory_range[KEXEC_SEGMENT_MAX];
+ const char *iomem;
+ int range_count = 0;
+ char line[MAX_LINE];
+ FILE *fp;
+
+ iomem = proc_iomem();
+ fp = fopen(iomem, "r");
+
+ if (!fp) {
+ fprintf(stderr, "Cannot open %s: %s\n",
+ iomem, strerror(errno));
+ return -1;
+ }
+
+ dbgprintf("memory ranges:\n");
+
+ while(fgets(line, sizeof(line), fp) != 0) {
+ struct memory_range r;
+ char *str;
+ int consumed;
+
+ if (range_count >= KEXEC_SEGMENT_MAX)
+ break;
+
+ if (sscanf(line, "%Lx-%Lx : %n", &r.start, &r.end, &consumed)
+ != 2)
+ continue;
+
+ str = line + consumed;
+ r.end++;
+
+ if (memcmp(str, "System RAM\n", 11)) {
+ dbgprintf(" Skip: %016Lx - %016Lx : %s", r.start, r.end,
+ str);
+ continue;
+ }
+
+ r.type = RANGE_RAM;
+ memory_range[range_count] = r;
+ range_count++;
+
+ dbgprintf(" Add: %016Lx - %016Lx : %s", r.start, r.end, str);
+ }
+
+ fclose(fp);
+ *range = memory_range;
+ *ranges = range_count;
+
+ return 0;
+}
+
+static int get_memory_ranges_2(struct memory_range **range, int *ranges,
+ unsigned long UNUSED(kexec_flags))
+{
+ static struct memory_range memory_range[2];
+
+ memory_range[0].start = 0x080000000;
+ memory_range[0].end = 0x100000000;
+ memory_range[0].type = RANGE_RAM;
+
+ memory_range[1].start = 0x900000000;
+ memory_range[1].end = 0x880000000;
+ memory_range[1].type = RANGE_RAM;
+
+ *range = memory_range;
+ *ranges = sizeof(memory_range) / sizeof(memory_range[0]);
+
+ return 0;
+}
+
+int get_memory_ranges(struct memory_range **range, int *ranges,
+ unsigned long kexec_flags)
+{
+ /* FIXME: Should get this info from device tree. */
+
+ return get_memory_ranges_1(range, ranges, kexec_flags);
+}
+
+struct file_type file_type[] = {
+ { "elf-arm64", elf_arm64_probe, elf_arm64_load, elf_arm64_usage },
+};
+
+int file_types = sizeof(file_type) / sizeof(file_type[0]);
+
+int arch_compat_trampoline(struct kexec_info *info)
+{
+ fprintf(stderr, "%s:%d: do\n", __func__, __LINE__);
+ return 0;
+}
+
+
+int machine_verify_elf_rel(struct mem_ehdr *ehdr)
+{
+ (void)ehdr;
+
+ fprintf(stderr, "%s:%d: do\n", __func__, __LINE__);
+ return 0;
+}
+
+void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
+ void *location, unsigned long address, unsigned long value)
+{
+ (void)ehdr;
+ (void)r_type;
+ (void)location;
+ (void)address;
+ (void)value;
+ fprintf(stderr, "%s:%d: do\n", __func__, __LINE__);
+}
diff --git a/kexec/arch/arm64/kexec-arm64.h b/kexec/arch/arm64/kexec-arm64.h
new file mode 100644
index 0000000..673d525
--- /dev/null
+++ b/kexec/arch/arm64/kexec-arm64.h
@@ -0,0 +1,28 @@
+/*
+ * ARM64 kexec support.
+ */
+
+#if !defined(KEXEC_ARM64_H)
+#define KEXEC_ARM64_H
+
+/* #include <linux/kexec.h> FIXME: this is broken */
+#include <sys/types.h>
+
+#include "../../kexec.h"
+
+#define KEXEC_SEGMENT_MAX 16 /* FIXME: this should come from <linux/kexec.h> */
+
+#define BOOT_BLOCK_VERSION 17
+#define BOOT_BLOCK_LAST_COMP_VERSION 16
+#define COMMAND_LINE_SIZE 512
+
+int elf_arm64_probe(const char *buf, off_t len);
+int elf_arm64_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info);
+void elf_arm64_usage(void);
+
+struct memory_ranges usablemem_rgns;
+off_t initrd_base;
+off_t initrd_size;
+
+#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..b267a15
--- /dev/null
+++ b/kexec/arch/arm64/kexec-elf-arm64.c
@@ -0,0 +1,147 @@
+/*
+ * ARM64 kexec support.
+ */
+
+#define _GNU_SOURCE
+
+#include <elf.h>
+#include <getopt.h>
+#include <libfdt.h>
+
+#include "kexec-arm64.h"
+
+#include "../../kexec-syscall.h"
+#include "../../fs2dt.h"
+
+#include "arch/options.h"
+
+#if !defined(EM_AARCH64)
+# define EM_AARCH64 183
+#endif
+
+int elf_arm64_probe(const char *buf, off_t len)
+{
+ int result;
+ struct mem_ehdr ehdr;
+
+ fprintf(stderr, "%s:%d: ->\n", __func__, __LINE__);
+
+ result = build_elf_exec_info(buf, len, &ehdr, 0);
+
+ if (result < 0) {
+ dbgprintf("Not an ELF executable\n");
+ goto out;
+ }
+
+ if (ehdr.e_machine != EM_AARCH64) {
+ dbgprintf("Not an AARCH64 executable\n");
+ result = -1;
+ goto out;
+ }
+
+ result = 0;
+
+out:
+ free_elf_info(&ehdr);
+ fprintf(stderr, "%s:%d: <-\n", __func__, __LINE__);
+ return result;
+}
+
+static off_t round_up(off_t v)
+{
+ return _ALIGN_DOWN(v + getpagesize(), getpagesize());
+}
+
+int elf_arm64_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info)
+{
+ char *dtb_buf;
+ off_t dtb_base;
+ off_t dtb_size;
+ struct mem_ehdr ehdr;
+ int result;
+ //unsigned int command_line_len = strlen(arm64_opts.command_line) + 1;
+
+ fprintf(stderr, "%s:%d: ->\n", __func__, __LINE__);
+
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ fprintf(stderr, "kexec: kdump not yet supported on arm64\n");
+ return -1;
+ }
+
+ result = build_elf_exec_info(buf, len, &ehdr, 0);
+
+ if (result < 0) {
+ free_elf_info(&ehdr);
+ fprintf(stderr, "%s:%d: build_elf_exec_info failed\n", __func__,
+ __LINE__);
+ return result;
+ }
+
+ elf_exec_build_load(info, &ehdr, buf, len, 0);
+
+ info->entry = (void*)0x80080000UL; // FIXME
+
+ initrd_base = 0;
+ initrd_size = 0;
+
+ if (arm64_opts.ramdisk) {
+ char *buf;
+
+ buf = slurp_file(arm64_opts.ramdisk, &initrd_size);
+
+ if (!buf)
+ fprintf(stderr, "kexec: empty ramdisk file\n");
+ else {
+ initrd_base = locate_hole(info, initrd_size, 0, 0, -1, -1);
+
+ add_segment_phys_virt(info, buf, initrd_size, initrd_base,
+ initrd_size, 0);
+ }
+ }
+
+ fprintf(stderr, "%s:%d: initrd_base: %lx, initrd_size: %lx\n", __func__,
+ __LINE__, (unsigned long)initrd_base, (unsigned long)initrd_size);
+
+ if (arm64_opts.dtb)
+ dtb_buf = slurp_file(arm64_opts.dtb, &dtb_size);
+ else
+ create_flatten_tree(&dtb_buf, &dtb_size,
+ arm64_opts.command_line);
+
+ fprintf(stderr, "%s:%d: dt magic: %x : %x\n", __func__, __LINE__,
+ fdt32_to_cpu(*(uint32_t*)dtb_buf), *(uint32_t*)dtb_buf);
+
+ result = fdt_check_header(dtb_buf);
+
+ if (result) {
+ fprintf(stderr, "Invalid FDT.\n");
+ return -1;
+ }
+
+ if (arm64_opts.command_line) {
+ // FIXME: need to handle command line...
+ fprintf(stderr, "%s:%d: command line support TODO\n", __func__, __LINE__);
+ }
+
+if (1) {
+ dtb_base = (unsigned long)info->entry + round_up(0xA43FA0); // computed kernel mem size.
+
+ fprintf(stderr, "%s:%d: dtb_base: %lx, dtb_size: %lx\n", __func__,
+ __LINE__, (unsigned long)dtb_base, (unsigned long)dtb_size);
+} else {
+ dtb_base = locate_hole(info, dtb_size, 0, 0, -1, -1);
+
+ fprintf(stderr, "%s:%d: dtb_base: %lx, dtb_size: %lx\n", __func__,
+ __LINE__, (unsigned long)dtb_base, (unsigned long)dtb_size);
+}
+ add_segment_phys_virt(info, dtb_buf, dtb_size, dtb_base, dtb_size, 0);
+
+ fprintf(stderr, "%s:%d: <-\n", __func__, __LINE__);
+ return 0;
+}
+
+void elf_arm64_usage(void)
+{
+ fprintf(stderr, "%s:%d\n", __func__, __LINE__);
+}
diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
index 6238044..ccca19c 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
@@ -76,6 +76,8 @@ static inline long kexec_load(void *entry, unsigned long nr_segments,
#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_AARCH64 (183 << 16) */
#define KEXEC_ARCH_S390 (22 << 16)
#define KEXEC_ARCH_SH (42 << 16)
#define KEXEC_ARCH_MIPS_LE (10 << 16)
@@ -121,5 +123,8 @@ static inline long kexec_load(void *entry, unsigned long nr_segments,
#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 */
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