diff options
| -rw-r--r-- | arch/powerpc/kernel/fadump.c | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index 958eb5cd2a9e..986ec476fd5d 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -908,22 +908,41 @@ static int allocate_crash_memory_ranges(void) static inline int fadump_add_crash_memory(unsigned long long base, unsigned long long end) { + u64 start, size; + bool is_adjacent = false; + if (base == end) return 0; - if (crash_mem_ranges == max_crash_mem_ranges) { - int ret; + /* + * Fold adjacent memory ranges to bring down the memory ranges/ + * PT_LOAD segments count. + */ + if (crash_mem_ranges) { + start = crash_memory_ranges[crash_mem_ranges - 1].base; + size = crash_memory_ranges[crash_mem_ranges - 1].size; - ret = allocate_crash_memory_ranges(); - if (ret) - return ret; + if ((start + size) == base) + is_adjacent = true; + } + if (!is_adjacent) { + /* resize the array on reaching the limit */ + if (crash_mem_ranges == max_crash_mem_ranges) { + int ret; + + ret = allocate_crash_memory_ranges(); + if (ret) + return ret; + } + + start = base; + crash_memory_ranges[crash_mem_ranges].base = start; + crash_mem_ranges++; } + crash_memory_ranges[crash_mem_ranges - 1].size = (end - start); pr_debug("crash_memory_range[%d] [%#016llx-%#016llx], %#llx bytes\n", - crash_mem_ranges, base, end - 1, (end - base)); - crash_memory_ranges[crash_mem_ranges].base = base; - crash_memory_ranges[crash_mem_ranges].size = end - base; - crash_mem_ranges++; + (crash_mem_ranges - 1), start, end - 1, (end - start)); return 0; } @@ -999,6 +1018,14 @@ static int fadump_setup_crash_memory_ranges(void) pr_debug("Setup crash memory ranges.\n"); crash_mem_ranges = 0; + + /* allocate memory for crash memory ranges for the first time */ + if (!max_crash_mem_ranges) { + ret = allocate_crash_memory_ranges(); + if (ret) + return ret; + } + /* * add the first memory chunk (RMA_START through boot_memory_size) as * a separate memory chunk. The reason is, at the time crash firmware |