diff options
Diffstat (limited to 'kexec/kexec.c')
| -rw-r--r-- | kexec/kexec.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kexec/kexec.c b/kexec/kexec.c index a2ba79d..cfd837c 100644 --- a/kexec/kexec.c +++ b/kexec/kexec.c @@ -995,6 +995,7 @@ void usage(void) " --mem-max=<addr> Specify the highest memory address to\n" " load code into.\n" " --reuseinitrd Reuse initrd from first boot.\n" + " --print-ckr-size Print crash kernel region size.\n" " --load-preserve-context Load the new kernel and preserve\n" " context of current kernel during kexec.\n" " --load-jump-back-helper Load a helper image to jump back\n" @@ -1218,6 +1219,18 @@ static int do_kexec_file_load(int fileind, int argc, char **argv, return ret; } +static void print_crashkernel_region_size(void) +{ + uint64_t start = 0, end = 0; + + if (is_crashkernel_mem_reserved() && + get_crash_kernel_load_range(&start, &end)) { + fprintf(stderr, "get_crash_kernel_load_range() failed.\n"); + return; + } + + printf("%lu\n", (start != end) ? (end - start + 1) : 0UL); +} int main(int argc, char *argv[]) { @@ -1375,6 +1388,9 @@ int main(int argc, char *argv[]) case OPT_STATUS: do_status = 1; break; + case OPT_PRINT_CKR_SIZE: + print_crashkernel_region_size(); + return 0; default: break; } |