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