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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2017-04-03 02:24:37 (GMT) |
|---|---|---|
| committer | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2017-06-08 10:17:36 (GMT) |
| commit | d651c5a1cf72dd0fe2e6b2a3759b13792eced5ff (patch) | |
| tree | cbf42fbeacf00f2ba513c8f7a4c135260c7a0c81 /arch/arm64/kernel | |
| parent | 302143b3fe0ed40b3d3de18fd6de47a7f3a96aee (diff) | |
| download | linux-d651c5a1cf72dd0fe2e6b2a3759b13792eced5ff.tar.xz | |
arm64: kdump: add VMCOREINFO's for user-space tools
In addition to common VMCOREINFO's defined in
crash_save_vmcoreinfo_init(), we need to know, for crash utility,
- kimage_voffset
- PHYS_OFFSET
to examine the contents of a dump file (/proc/vmcore) correctly
due to the introduction of KASLR (CONFIG_RANDOMIZE_BASE) in v4.6.
- VA_BITS
is also required for makedumpfile command.
arch_crash_save_vmcoreinfo() appends them to the dump file.
More VMCOREINFO's may be added later.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/machine_kexec.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 779a800..481f54a 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -18,6 +18,7 @@ #include <asm/cacheflush.h> #include <asm/cpu_ops.h> +#include <asm/memory.h> #include <asm/mmu.h> #include <asm/mmu_context.h> #include <asm/page.h> @@ -351,3 +352,13 @@ void crash_free_reserved_phys_range(unsigned long begin, unsigned long end) } } #endif /* CONFIG_HIBERNATION */ + +void arch_crash_save_vmcoreinfo(void) +{ + VMCOREINFO_NUMBER(VA_BITS); + /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */ + vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n", + kimage_voffset); + vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n", + PHYS_OFFSET); +} |