kernel could have that in /proc/iomem, will use it for kdump kernel for dma32
Signed-off-by: Yinghai Lu <[email protected]> --- kexec/arch/i386/crashdump-x86.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c index 245402c..83bff5e 100644 --- a/kexec/arch/i386/crashdump-x86.c +++ b/kexec/arch/i386/crashdump-x86.c @@ -188,6 +188,8 @@ static struct memory_range crash_memory_range[CRASH_MAX_MEMORY_RANGES]; /* Memory region reserved for storing panic kernel and other data. */ static struct memory_range crash_reserved_mem; +/* under 4G parts */ +static struct memory_range crash_reserved_low_mem; /* Reads the appropriate file and retrieves the SYSTEM RAM regions for whom to * create Elf headers. Keeping it separate from get_memory_ranges() as @@ -282,6 +284,10 @@ static int get_crash_memory_ranges(struct memory_range **range, int *ranges, if (exclude_region(&memory_ranges, crash_reserved_mem.start, crash_reserved_mem.end) < 0) return -1; + if (crash_reserved_low_mem.start && + exclude_region(&memory_ranges, crash_reserved_low_mem.start, + crash_reserved_low_mem.end) < 0) + return -1; if (gart) { /* exclude GART region if the system has one */ if (exclude_region(&memory_ranges, gart_start, gart_end) < 0) @@ -984,6 +990,12 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline, return ENOCRASHKERNEL; } + if (crash_reserved_low_mem.start) { + sz = crash_reserved_low_mem.end - crash_reserved_low_mem.start + +1; + add_memmap(memmap_p, crash_reserved_low_mem.start, sz); + } + /* Create a backup region segment to store backup data*/ if (!(info->kexec_flags & KEXEC_PRESERVE_CONTEXT)) { sz = (info->backup_src_size + align) & ~(align - 1); @@ -1059,5 +1071,14 @@ int is_crashkernel_mem_reserved(void) crash_reserved_mem.end = end; crash_reserved_mem.type = RANGE_RAM; + /* If there is no Crash low kernel, still can go on */ + if (parse_iomem_single("Crash kernel low\n", &start, &end) || + start == end) + return 1; + + crash_reserved_low_mem.start = start; + crash_reserved_low_mem.end = end; + crash_reserved_low_mem.type = RANGE_RAM; + return 1; } -- 1.7.10.4 _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
