summaryrefslogtreecommitdiffstats
path: root/kexec/arch/s390/kexec-image.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 02:56:35 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 02:56:35 +0000
commiteba0cfa6b0bef4f2e73c8630a7efa3944df8b0f8 (patch)
tree74c37eede1f0634cc5de1c63c934edaa1630c6bc /kexec/arch/s390/kexec-image.c
parentInitial commit. (diff)
downloadkexec-tools-eba0cfa6b0bef4f2e73c8630a7efa3944df8b0f8.tar.xz
kexec-tools-eba0cfa6b0bef4f2e73c8630a7efa3944df8b0f8.zip
Adding upstream version 1:2.0.27.upstream/1%2.0.27upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'kexec/arch/s390/kexec-image.c')
-rw-r--r--kexec/arch/s390/kexec-image.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/kexec/arch/s390/kexec-image.c b/kexec/arch/s390/kexec-image.c
new file mode 100644
index 0000000..69aaf96
--- /dev/null
+++ b/kexec/arch/s390/kexec-image.c
@@ -0,0 +1,236 @@
+/*
+ * kexec/arch/s390/kexec-image.c
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <getopt.h>
+#include "../../kexec.h"
+#include "../../kexec-syscall.h"
+#include "../../kexec/crashdump.h"
+#include "kexec-s390.h"
+#include <arch/options.h>
+#include <fcntl.h>
+
+static uint64_t crash_base, crash_end;
+
+static void add_segment_check(struct kexec_info *info, const void *buf,
+ size_t bufsz, unsigned long base, size_t memsz)
+{
+ if (info->kexec_flags & KEXEC_ON_CRASH)
+ if (base + memsz > crash_end - crash_base)
+ die("Not enough crashkernel memory to load segments\n");
+ add_segment(info, buf, bufsz, crash_base + base, memsz);
+}
+
+int command_line_add(struct kexec_info *info, const char *str)
+{
+ char *tmp = NULL;
+
+ tmp = concat_cmdline(info->command_line, str);
+ if (!tmp) {
+ fprintf(stderr, "out of memory\n");
+ return -1;
+ }
+
+ free(info->command_line);
+ info->command_line = tmp;
+ return 0;
+}
+
+int image_s390_load_file(int argc, char **argv, struct kexec_info *info)
+{
+ const char *ramdisk = NULL;
+ int opt;
+
+ static const struct option options[] =
+ {
+ KEXEC_ALL_OPTIONS
+ {0, 0, 0, 0},
+ };
+ static const char short_options[] = KEXEC_OPT_STR "";
+
+ while ((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
+ switch(opt) {
+ case OPT_APPEND:
+ if (command_line_add(info, optarg))
+ return -1;
+ break;
+ case OPT_RAMDISK:
+ ramdisk = optarg;
+ break;
+ case OPT_REUSE_CMDLINE:
+ free(info->command_line);
+ info->command_line = get_command_line();
+ break;
+ }
+ }
+
+ if (ramdisk) {
+ info->initrd_fd = open(ramdisk, O_RDONLY);
+ if (info->initrd_fd == -1) {
+ fprintf(stderr, "Could not open initrd file %s:%s\n",
+ ramdisk, strerror(errno));
+ free(info->command_line);
+ info->command_line = NULL;
+ return -1;
+ }
+ }
+
+ if (info->command_line)
+ info->command_line_len = strlen(info->command_line) + 1;
+ else
+ info->command_line_len = 0;
+ return 0;
+}
+
+int
+image_s390_load(int argc, char **argv, const char *kernel_buf,
+ off_t kernel_size, struct kexec_info *info)
+{
+ void *krnl_buffer;
+ char *rd_buffer;
+ const char *ramdisk;
+ off_t ramdisk_len;
+ unsigned int ramdisk_origin;
+ int opt, ret = -1;
+
+ if (info->file_mode)
+ return image_s390_load_file(argc, argv, info);
+
+ static const struct option options[] =
+ {
+ KEXEC_ALL_OPTIONS
+ {0, 0, 0, 0},
+ };
+ static const char short_options[] = KEXEC_OPT_STR "";
+
+ ramdisk = NULL;
+ ramdisk_len = 0;
+ ramdisk_origin = 0;
+
+ while ((opt = getopt_long(argc,argv,short_options,options,0)) != -1) {
+ switch(opt) {
+ case OPT_APPEND:
+ if (command_line_add(info, optarg))
+ return -1;
+ break;
+ case OPT_REUSE_CMDLINE:
+ free(info->command_line);
+ info->command_line = get_command_line();
+ break;
+ case OPT_RAMDISK:
+ ramdisk = optarg;
+ break;
+ }
+ }
+
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ if (parse_iomem_single("Crash kernel\n", &crash_base,
+ &crash_end))
+ goto out;
+ }
+
+ /* Add kernel segment */
+ add_segment_check(info, kernel_buf + IMAGE_READ_OFFSET,
+ kernel_size - IMAGE_READ_OFFSET, IMAGE_READ_OFFSET,
+ kernel_size - IMAGE_READ_OFFSET);
+
+ /* We do want to change the kernel image */
+ krnl_buffer = (void *) kernel_buf + IMAGE_READ_OFFSET;
+
+ /*
+ * Load ramdisk if present: If image is larger than RAMDISK_ORIGIN_ADDR,
+ * we load the ramdisk directly behind the image with 1 MiB alignment.
+ */
+ if (ramdisk) {
+ rd_buffer = slurp_file_mmap(ramdisk, &ramdisk_len);
+ if (rd_buffer == NULL) {
+ fprintf(stderr, "Could not read ramdisk.\n");
+ goto out;
+ }
+ ramdisk_origin = MAX(RAMDISK_ORIGIN_ADDR, kernel_size);
+ ramdisk_origin = _ALIGN_UP(ramdisk_origin, 0x100000);
+ add_segment_check(info, rd_buffer, ramdisk_len,
+ ramdisk_origin, ramdisk_len);
+ }
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ if (load_crashdump_segments(info, crash_base, crash_end))
+ goto out;
+ } else {
+ info->entry = (void *) IMAGE_READ_OFFSET;
+ }
+
+ /* Register the ramdisk and crashkernel memory in the kernel. */
+ {
+ unsigned long long *tmp;
+
+ tmp = krnl_buffer + INITRD_START_OFFS;
+ *tmp = (unsigned long long) ramdisk_origin;
+
+ tmp = krnl_buffer + INITRD_SIZE_OFFS;
+ *tmp = (unsigned long long) ramdisk_len;
+
+ if (info->kexec_flags & KEXEC_ON_CRASH) {
+ tmp = krnl_buffer + OLDMEM_BASE_OFFS;
+ *tmp = crash_base;
+
+ tmp = krnl_buffer + OLDMEM_SIZE_OFFS;
+ *tmp = crash_end - crash_base + 1;
+ }
+ }
+
+ if (info->command_line) {
+ unsigned long maxsize;
+ char *dest = krnl_buffer + COMMAND_LINE_OFFS;
+
+ maxsize = *(unsigned long *)(krnl_buffer + MAX_COMMAND_LINESIZE_OFFS);
+ if (!maxsize)
+ maxsize = LEGACY_COMMAND_LINESIZE;
+
+ if (strlen(info->command_line) > maxsize-1) {
+ fprintf(stderr, "command line too long, maximum allowed size %ld\n",
+ maxsize-1);
+ goto out;
+ }
+ strncpy(dest, info->command_line, maxsize-1);
+ dest[maxsize-1] = '\0';
+ }
+ ret = 0;
+out:
+ free(info->command_line);
+ info->command_line = NULL;
+ return ret;
+}
+
+int
+image_s390_probe(const char *UNUSED(kernel_buf), off_t UNUSED(kernel_size))
+{
+ /*
+ * Can't reliably tell if an image is valid,
+ * therefore everything is valid.
+ */
+ return 0;
+}
+
+void
+image_s390_usage(void)
+{
+ printf("--command-line=STRING Set the kernel command line to STRING.\n"
+ "--append=STRING Set the kernel command line to STRING.\n"
+ "--initrd=FILENAME Use the file FILENAME as a ramdisk.\n"
+ "--reuse-cmdline Use kernel command line from running system.\n"
+ );
+}