[PATCH 4/4] 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 <[EMAIL PROTECTED]>
---
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
}
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;
+}
--
1.4.2
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