Add a common feature for architectures to retrieve AX_PHYSMEM_BITS
from vmcoreinfo, which was added by kernel commit 1d50e5d0c505 ("
crash_core, vmcoreinfo: Append 'MAX_PHYSMEM_BITS' to vmcoreinfo").
This makes makedumpfile adaptable for future MAX_PHYSMEM_BITS changes.
Also ensure backward compatibility for kernel versions in which
MAX_PHYSMEM_BITS is not available in vmcoreinfo.
Signed-off-by: Youling Tang <tangyoul...@loongson.cn>
---
arch/mips64.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/mips64.c b/arch/mips64.c
index c968082..d541c3e 100644
--- a/arch/mips64.c
+++ b/arch/mips64.c
@@ -35,9 +35,14 @@ get_phys_base_mips64(void)
int
get_machdep_info_mips64(void)
{
- info->max_physmem_bits = _MAX_PHYSMEM_BITS;
info->section_size_bits = _SECTION_SIZE_BITS;
+ /* Check if we can get MAX_PHYSMEM_BITS from vmcoreinfo */
+ if (NUMBER(MAX_PHYSMEM_BITS) != NOT_FOUND_NUMBER)
+ info->max_physmem_bits = NUMBER(MAX_PHYSMEM_BITS);
+ else
+ info->max_physmem_bits = _MAX_PHYSMEM_BITS;
+
DEBUG_MSG("max_physmem_bits : %lx\n", info->max_physmem_bits);
DEBUG_MSG("section_size_bits: %lx\n", info->section_size_bits);
--
2.1.0
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