From: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Implement get_crash_kernel_load_range() in support of
print crash kernel region size option.
Signed-off-by: Daniel Kiper <daniel.kiper at oracle.com>
Signed-off-by: Eric DeVolder <eric.devolder at oracle.com>
---
kexec/arch/ppc64/crashdump-ppc64.c | 21 +++++++++++++++++++++
kexec/arch/ppc64/kexec-ppc64.c | 27 +++++++++++++++++++++++++++
kexec/arch/ppc64/kexec-ppc64.h | 2 ++
3 files changed, 50 insertions(+)
diff --git a/kexec/arch/ppc64/crashdump-ppc64.c b/kexec/arch/ppc64/crashdump-ppc64.c
index f62b159..af9adb4 100644
--- a/kexec/arch/ppc64/crashdump-ppc64.c
+++ b/kexec/arch/ppc64/crashdump-ppc64.c
@@ -526,6 +526,27 @@ void add_usable_mem_rgns(unsigned long long base, unsigned long long size)
usablemem_rgns.size, base, size);
}
+int get_crash_kernel_load_range(uint64_t *start, uint64_t *end)
+{
+ unsigned long long value;
+ int ret = 0;
+
+ if (get_devtree_value("/proc/device-tree/chosen/linux,crashkernel-base", &value))
+ *start = value;
+ else {
+ *start = 0;
+ ret = -1;
+ }
+ if (get_devtree_value("/proc/device-tree/chosen/linux,crashkernel-size", &value))
+ *end = *start + value - 1;
+ else {
+ *end = 0;
+ ret = -1;
+ }
+
+ return ret;
+}
+
int is_crashkernel_mem_reserved(void)
{
int fd;
diff --git a/kexec/arch/ppc64/kexec-ppc64.c b/kexec/arch/ppc64/kexec-ppc64.c
index 09ee025..33bc76f 100644
--- a/kexec/arch/ppc64/kexec-ppc64.c
+++ b/kexec/arch/ppc64/kexec-ppc64.c
@@ -356,6 +356,33 @@ void scan_reserved_ranges(unsigned long kexec_flags, int *range_index)
*range_index = i;
}
+int get_devtree_value(const char *fname, unsigned long long *pvalue)
+{
+ /* Return 1 if fname/value valid, 0 otherwise */
+ FILE *file;
+ char buf[MAXBYTES];
+ int ret = 1, n = -1;
+ unsigned long long value = 0;
+
+ if ((file = fopen(fname, "r"))) {
+ n = fread(buf, 1, MAXBYTES, file);
+ fclose(file);
+ }
+
+ if (n == sizeof(uint32_t))
+ value = ((uint32_t *)buf)[0];
+ else if (n == sizeof(uint64_t))
+ value = ((uint64_t *)buf)[0];
+ else {
+ fprintf(stderr, "%s node has invalid size: %d\n", fname, n);
+ ret = 0;
+ }
+
+ if (pvalue)
+ *pvalue = value;
+ return ret;
+}
+
/* Get devtree details and create exclude_range array
* Also create usablemem_ranges for KEXEC_ON_CRASH
*/
diff --git a/kexec/arch/ppc64/kexec-ppc64.h b/kexec/arch/ppc64/kexec-ppc64.h
index 89ee942..3d20419 100644
--- a/kexec/arch/ppc64/kexec-ppc64.h
+++ b/kexec/arch/ppc64/kexec-ppc64.h
@@ -14,6 +14,8 @@
#define HAVE_DYNAMIC_MEMORY
#define NEED_RESERVE_DTB
+extern int get_devtree_value (const char *fname, unsigned long long *pvalue);
+
int setup_memory_ranges(unsigned long kexec_flags);
int elf_ppc64_probe(const char *buf, off_t len);
--
2.7.4
