[PATCH] How to validate this patch

[Yanjiang Jin]

I have a arm64 system, I can find the virtural memory layout during booting:

Virtual kernel memory layout:
.............................
    memory  : 0xffff800000200000 - 0xffff801800000000   ( 98302 MB)

Then I can read the elf_info in vmcore:

readelf -l vmcore

Program Headers:
Type Offset             VirtAddr           PhysAddr            FileSize
...............................................................................

LOAD 0x0000000076d40000 0xffff80017fe00000 0x0000000180000000 0x0000001680000000

The end of vmcore's VirtAddr is

(0xffff80017fe00000 + 0x0000001680000000) = 0xFFFF8017FFE00000

The end of vmlinux's VirtAddr is

0xffff801800000000

They have 0x20000 offset.

If we use vmcore-dmesg to read the log_buf from vmcore, we would get
the below error:

vmcore-dmesg vmcore

"No program header covering vaddr 0xffff8017ffe90000 found kexec bug?"

Since on my system, log_buf is in 0xffff8017ffe90000, it exceeds the end
of vmcore VirtAddr.

With my patch, vmcore-dmesg can read all dmesg info happily.

Yanjiang Jin (1):
  arm64: update PHYS_OFFSET to conform to kernel

 kexec/arch/arm64/kexec-arm64.c | 100 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)

--
1.8.3.1




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