187 lines
4.9 KiB
Diff
187 lines
4.9 KiB
Diff
--- a/arch/mips/kernel/machine_kexec.c
|
|
+++ b/arch/mips/kernel/machine_kexec.c
|
|
@@ -23,67 +23,104 @@ void (*relocated_kexec_smp_wait) (void *
|
|
atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
|
|
#endif
|
|
|
|
-static void machine_kexec_init_args(void)
|
|
+#define KEXEC_MIPS_ARGV_BUF_SIZE COMMAND_LINE_SIZE
|
|
+#define KEXEC_MIPS_ARGV_MAX_ARGS (COMMAND_LINE_SIZE / 15)
|
|
+
|
|
+char kexec_argv_buf[KEXEC_MIPS_ARGV_BUF_SIZE] __kexec;
|
|
+int kexec_argv[KEXEC_MIPS_ARGV_MAX_ARGS] __kexec;
|
|
+
|
|
+static void
|
|
+machine_kexec_print_args(void)
|
|
{
|
|
- kexec_args[0] = fw_arg0;
|
|
- kexec_args[1] = fw_arg1;
|
|
- kexec_args[2] = fw_arg2;
|
|
- kexec_args[3] = fw_arg3;
|
|
+ int i;
|
|
|
|
pr_info("kexec_args[0] (argc): %lu\n", kexec_args[0]);
|
|
pr_info("kexec_args[1] (argv): %p\n", (void *)kexec_args[1]);
|
|
pr_info("kexec_args[2] (env ): %p\n", (void *)kexec_args[2]);
|
|
pr_info("kexec_args[3] (desc): %p\n", (void *)kexec_args[3]);
|
|
-}
|
|
|
|
-#define ARGV_MAX_ARGS (COMMAND_LINE_SIZE / 15)
|
|
+ for (i = 0; i < kexec_args[0]; i++)
|
|
+ pr_info("kexec_argv[%d] = %p, %s\n", i,
|
|
+ (char *)kexec_argv[i], (char *)kexec_argv[i]);
|
|
+}
|
|
|
|
-int machine_kexec_pass_args(struct kimage *image)
|
|
+static void
|
|
+machine_kexec_init_argv(struct kimage *image)
|
|
{
|
|
- int i, argc = 0;
|
|
- char *bootloader = "kexec";
|
|
- int *kexec_argv = (int *)kexec_args[1];
|
|
+ void __user *buf;
|
|
+ size_t bufsz;
|
|
+ size_t size;
|
|
+ int i;
|
|
|
|
+ bufsz = 0;
|
|
for (i = 0; i < image->nr_segments; i++) {
|
|
- if (!strncmp(bootloader, (char *)image->segment[i].buf,
|
|
- strlen(bootloader))) {
|
|
- /*
|
|
- * convert command line string to array
|
|
- * of parameters (as bootloader does).
|
|
- */
|
|
- /*
|
|
- * Note: we do treat the 1st string "kexec" as an
|
|
- * argument ;-) so, argc here is 1.
|
|
- */
|
|
- char *str = (char *)image->segment[i].buf;
|
|
- char *ptr = strchr(str, ' ');
|
|
- char *kbuf = (char *)kexec_argv[0];
|
|
- /* Whenever --command-line or --append used, "kexec" is copied */
|
|
- argc = 1;
|
|
- /* Parse the offset */
|
|
- while (ptr && (ARGV_MAX_ARGS > argc)) {
|
|
- *ptr = '\0';
|
|
- if (ptr[1] != ' ' && ptr[1] != '\0') {
|
|
- int offt = (int)(ptr - str + 1);
|
|
- kexec_argv[argc] = (int)kbuf + offt;
|
|
- argc++;
|
|
- }
|
|
- ptr = strchr(ptr + 1, ' ');
|
|
- }
|
|
- if (argc > 1) {
|
|
- /* Copy to kernel space */
|
|
- copy_from_user(kbuf, (char *)image->segment[i].buf, image->segment[i].bufsz);
|
|
- fw_arg0 = kexec_args[0] = argc;
|
|
- }
|
|
- break;
|
|
+ struct kexec_segment *seg;
|
|
+
|
|
+ seg = &image->segment[i];
|
|
+ if (seg->bufsz < 6)
|
|
+ continue;
|
|
+
|
|
+ if (strncmp((char *) seg->buf, "kexec", 5))
|
|
+ continue;
|
|
+
|
|
+ /* don't copy "kexec" */
|
|
+ buf = seg->buf + 5;
|
|
+ bufsz = seg->bufsz - 5;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ if (i >= image->nr_segments)
|
|
+ return;
|
|
+
|
|
+ size = KEXEC_MIPS_ARGV_BUF_SIZE - 1;
|
|
+ size = min(size, bufsz);
|
|
+ if (size < bufsz)
|
|
+ pr_warn("kexec command line truncated to %d bytes\n", size);
|
|
+
|
|
+ /* Copy to kernel space */
|
|
+ copy_from_user(kexec_argv_buf, buf, size);
|
|
+}
|
|
+
|
|
+static void
|
|
+machine_kexec_parse_argv(struct kimage *image)
|
|
+{
|
|
+ char *reboot_code_buffer;
|
|
+ int reloc_delta;
|
|
+ char *ptr;
|
|
+ int argc;
|
|
+ int i;
|
|
+
|
|
+ ptr = kexec_argv_buf;
|
|
+ argc = 0;
|
|
+
|
|
+ /*
|
|
+ * convert command line string to array of parameters
|
|
+ * (as bootloader does).
|
|
+ */
|
|
+ while (ptr && *ptr && (KEXEC_MIPS_ARGV_MAX_ARGS > argc)) {
|
|
+ if (*ptr == ' ') {
|
|
+ *ptr++ = '\0';
|
|
+ continue;
|
|
}
|
|
+
|
|
+ kexec_argv[argc++] = (int) ptr;
|
|
+ ptr = strchr(ptr, ' ');
|
|
}
|
|
|
|
- pr_info("argc = %lu\n", kexec_args[0]);
|
|
- for (i = 0; i < kexec_args[0]; i++)
|
|
- pr_info("argv[%d] = %p, %s\n", i, (char *)kexec_argv[i], (char *)kexec_argv[i]);
|
|
+ if (!argc)
|
|
+ return;
|
|
|
|
- return 0;
|
|
+ kexec_args[0] = argc;
|
|
+ kexec_args[1] = (int) kexec_argv;
|
|
+ kexec_args[2] = 0;
|
|
+ kexec_args[3] = 0;
|
|
+
|
|
+ reboot_code_buffer = page_address(image->control_code_page);
|
|
+ reloc_delta = reboot_code_buffer - (char *) &__start___kexec_relocate;
|
|
+
|
|
+ kexec_args[1] += reloc_delta;
|
|
+ for (i = 0; i < argc; i++)
|
|
+ kexec_argv[i] += reloc_delta;
|
|
}
|
|
|
|
int
|
|
@@ -95,8 +132,14 @@ machine_kexec_prepare(struct kimage *kim
|
|
*
|
|
* This can be overrided by _machine_kexec_prepare().
|
|
*/
|
|
- machine_kexec_init_args();
|
|
- machine_kexec_pass_args(kimage);
|
|
+
|
|
+ kexec_args[0] = fw_arg0;
|
|
+ kexec_args[1] = fw_arg1;
|
|
+ kexec_args[2] = fw_arg2;
|
|
+ kexec_args[3] = fw_arg3;
|
|
+
|
|
+ machine_kexec_init_argv(kimage);
|
|
+ machine_kexec_parse_argv(kimage);
|
|
|
|
if (_machine_kexec_prepare)
|
|
return _machine_kexec_prepare(kimage);
|
|
@@ -152,11 +195,13 @@ machine_kexec(struct kimage *image)
|
|
pr_info("kexec_indirection_page = %p\n",
|
|
(void *)kexec_indirection_page);
|
|
|
|
+ pr_info("Copy kexec_relocate section from %p to reboot_code_buffer: %p\n",
|
|
+ &__start___kexec_relocate, (void *)reboot_code_buffer);
|
|
+
|
|
memcpy((void *)reboot_code_buffer, &__start___kexec_relocate,
|
|
kexec_relocate_size);
|
|
|
|
- pr_info("Copy kexec_relocate section from %p to reboot_code_buffer: %p\n",
|
|
- &__start___kexec_relocate, (void *)reboot_code_buffer);
|
|
+ machine_kexec_print_args();
|
|
|
|
/*
|
|
* The generic kexec code builds a page list with physical
|