diff options
| author | Mohan Kumar M <mohan@in.ibm.com> | 2006-10-09 14:56:19 +0530 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2006-10-13 16:04:17 +0900 |
| commit | 2e9b9aed5d7ddf6195fb3d7da9c62596df11e308 (patch) | |
| tree | 46dc575ae0a86336283ab364d3ecdf510f7f7aef | |
| parent | fcd1df8df66762b741a99319434405817e4c31ec (diff) | |
Check for crashkernel reservation in x86_64
Check whether memory for crashkernel is reserved or not by looking for the
entry "Crash kernel" in /proc/iomem.
Signed-off-by: Mohan Kumar M <mohan@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
| -rw-r--r-- | kexec/arch/x86_64/crashdump-x86_64.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kexec/arch/x86_64/crashdump-x86_64.c b/kexec/arch/x86_64/crashdump-x86_64.c index 9d9ab66..c23fb30 100644 --- a/kexec/arch/x86_64/crashdump-x86_64.c +++ b/kexec/arch/x86_64/crashdump-x86_64.c @@ -808,3 +808,33 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline, } return 0; } + +int is_crashkernel_mem_reserved(void) +{ + const char iomem[]= "/proc/iomem"; + char line[MAX_LINE]; + FILE *fp; + unsigned long long start, end; + char *str; + int consumed; + int count; + + fp = fopen(iomem, "r"); + if (!fp) + die("Cannot open /proc/iomem"); + + while(fgets(line, sizeof(line), fp) != 0) { + count = sscanf(line, "%Lx-%Lx : %n", &start, &end, &consumed); + if (count != 2) + continue; + str = line + consumed; + if (memcmp(str, "Crash kernel\n", 13) == 0) + break; + } + + fclose(fp); + if (!memcmp(str, "Crash kernel\n", 13) == 0 || (start == end)) + return 0; + else + return 1; +} |