# My kexec_file patch for arm64 is now merged in v5.0-rc1.
With this patch, kexec_file_load() system call is supported.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
---
kexec/arch/arm64/kexec-arm64.c | 10 +++++++++-
kexec/arch/arm64/kexec-elf-arm64.c | 9 +++++++++
kexec/arch/arm64/kexec-image-arm64.c | 28 ++++++++++++++++++++++++++-
kexec/arch/arm64/kexec-uImage-arm64.c | 7 +++++++
kexec/kexec-syscall.h | 3 +++
5 files changed, 55 insertions(+), 2 deletions(-)
diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
index 536c64b06384..1cde75d1a771 100644
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -141,6 +141,7 @@ int arch_process_options(int argc, char **argv)
int opt;
char *cmdline = NULL;
const char *append = NULL;
+ int do_kexec_file_syscall = 0;
for (opt = 0; opt != -1; ) {
opt = getopt_long(argc, argv, short_options, options, 0);
@@ -158,6 +159,9 @@ int arch_process_options(int argc, char **argv)
case OPT_INITRD:
arm64_opts.initrd = optarg;
break;
+ case OPT_KEXEC_FILE_SYSCALL:
+ do_kexec_file_syscall = 1;
+ break;
default:
break; /* Ignore core and unknown options. */
}
@@ -169,7 +173,11 @@ int arch_process_options(int argc, char **argv)
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);
+ dbgprintf("%s:%d: dtb: %s\n", __func__, __LINE__,
+ (do_kexec_file_syscall && arm64_opts.dtb ? "(ignored)" :
+ arm64_opts.dtb));
+ if (do_kexec_file_syscall)
+ arm64_opts.dtb = NULL;
return 0;
}
diff --git a/kexec/arch/arm64/kexec-elf-arm64.c b/kexec/arch/arm64/kexec-elf-arm64.c
index fc83b42c9d2b..e14f8e92004b 100644
--- a/kexec/arch/arm64/kexec-elf-arm64.c
+++ b/kexec/arch/arm64/kexec-elf-arm64.c
@@ -5,10 +5,12 @@
#define _GNU_SOURCE
#include <errno.h>
+#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <linux/elf.h>
+#include "arch/options.h"
#include "crashdump-arm64.h"
#include "kexec-arm64.h"
#include "kexec-elf.h"
@@ -47,6 +49,13 @@ int elf_arm64_load(int argc, char **argv, const char *kernel_buf,
int result;
int i;
+ if (info->file_mode) {
+ fprintf(stderr,
+ "ELF executable is not supported in kexec_file\n");
+
+ return EFAILED;
+ }
+
result = build_elf_exec_info(kernel_buf, kernel_size, &ehdr, 0);
if (result < 0) {
diff --git a/kexec/arch/arm64/kexec-image-arm64.c b/kexec/arch/arm64/kexec-image-arm64.c
index e1b1e54b149f..685a99352e39 100644
--- a/kexec/arch/arm64/kexec-image-arm64.c
+++ b/kexec/arch/arm64/kexec-image-arm64.c
@@ -4,10 +4,15 @@
#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
#include "crashdump-arm64.h"
+#include "image-header.h"
+#include "kexec.h"
#include "kexec-arm64.h"
#include "kexec-syscall.h"
-#include <limits.h>
+#include "arch/options.h"
int image_arm64_probe(const char *kernel_buf, off_t kernel_size)
{
@@ -35,6 +40,27 @@ int image_arm64_load(int argc, char **argv, const char *kernel_buf,
unsigned long kernel_segment;
int result;
+ if (info->file_mode) {
+ if (arm64_opts.initrd) {
+ info->initrd_fd = open(arm64_opts.initrd, O_RDONLY);
+ if (info->initrd_fd == -1) {
+ fprintf(stderr,
+ "Could not open initrd file %s:%s\n",
+ arm64_opts.initrd, strerror(errno));
+ result = EFAILED;
+ goto exit;
+ }
+ }
+
+ if (arm64_opts.command_line) {
+ info->command_line = (char *)arm64_opts.command_line;
+ info->command_line_len =
+ strlen(arm64_opts.command_line) + 1;
+ }
+
+ return 0;
+ }
+
header = (const struct arm64_image_header *)(kernel_buf);
if (arm64_process_image_header(header))
diff --git a/kexec/arch/arm64/kexec-uImage-arm64.c b/kexec/arch/arm64/kexec-uImage-arm64.c
index 022d7ee4693a..126ea9c2555b 100644
--- a/kexec/arch/arm64/kexec-uImage-arm64.c
+++ b/kexec/arch/arm64/kexec-uImage-arm64.c
@@ -20,6 +20,13 @@ int uImage_arm64_load(int argc, char **argv, const char *buf, off_t len,
struct Image_info img;
int ret;
+ if (info->file_mode) {
+ fprintf(stderr,
+ "uImage is not supported in kexec_file\n");
+
+ return EFAILED;
+ }
+
ret = uImage_load(buf, len, &img);
if (ret)
return ret;
diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
index b96e02aaae13..dac1c1f7564e 100644
--- a/kexec/kexec-syscall.h
+++ b/kexec/kexec-syscall.h
@@ -67,6 +67,9 @@
#ifdef __s390x__
#define __NR_kexec_file_load 381
#endif
+#ifdef __aarch64__
+#define __NR_kexec_file_load 294
+#endif
#ifndef __NR_kexec_file_load
/* system call not available for the arch */
