On 05/16/18 at 02:27pm, Philipp Rudo wrote:
> Since kernel 4.17-rc2 s390 supports the kexec_file_load system call. Add
> the new system call to kexec-tools and provide the -s (--kexec-file-syscall)
> option for s390 to support this new feature.
>
> Signed-off-by: Philipp Rudo <prudo@xxxxxxxxxxxxx>
> ---
> kexec/arch/s390/kexec-image.c | 46 +++++++++++++++++++++++++++++++++++++++++++
> kexec/kexec-syscall.h | 3 +++
> 2 files changed, 49 insertions(+)
>
> diff --git a/kexec/arch/s390/kexec-image.c b/kexec/arch/s390/kexec-image.c
> index 0c8937b..8b39566 100644
> --- a/kexec/arch/s390/kexec-image.c
> +++ b/kexec/arch/s390/kexec-image.c
> @@ -22,6 +22,7 @@
> #include "../../kexec/crashdump.h"
> #include "kexec-s390.h"
> #include <arch/options.h>
> +#include <fcntl.h>
>
> static uint64_t crash_base, crash_end;
> static char command_line[COMMAND_LINESIZE];
> @@ -45,6 +46,48 @@ int command_line_add(const char *str)
> 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_OPTIONS
> + {"command-line", 1, 0, OPT_APPEND},
> + {"append", 1, 0, OPT_APPEND},
> + {"initrd", 1, 0, OPT_RAMDISK},
> + {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(optarg))
> + return -1;
> + break;
> + case OPT_RAMDISK:
> + ramdisk = optarg;
> + 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));
> + return -1;
> + }
> + }
> +
> + info->command_line = command_line;
> + info->command_line_len = strlen (command_line) + 1;
> +
> + return 0;
> +}
> +
> int
> image_s390_load(int argc, char **argv, const char *kernel_buf,
> off_t kernel_size, struct kexec_info *info)
> @@ -56,6 +99,9 @@ image_s390_load(int argc, char **argv, const char *kernel_buf,
> unsigned int ramdisk_origin;
> int opt;
>
> + if (info->file_mode)
> + return image_s390_load_file(argc, argv, info);
> +
> static const struct option options[] =
> {
> KEXEC_OPTIONS
> diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
> index 33638c2..b96e02a 100644
> --- a/kexec/kexec-syscall.h
> +++ b/kexec/kexec-syscall.h
> @@ -64,6 +64,9 @@
> #ifdef __powerpc64__
> #define __NR_kexec_file_load 382
> #endif
> +#ifdef __s390x__
> +#define __NR_kexec_file_load 381
> +#endif
>
> #ifndef __NR_kexec_file_load
> /* system call not available for the arch */
> --
> 2.16.3
>
>
> _______________________________________________
> kexec mailing list
> kexec@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/kexec
Acked-by: Dave Young <dyoung@xxxxxxxxxx>
Thanks
Dave
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