aboutsummaryrefslogtreecommitdiff
path: root/arch/arm64/kernel/machine_kexec.c
diff options
context:
space:
mode:
authorAKASHI Takahiro <takahiro.akashi@linaro.org>2017-04-03 11:24:37 +0900
committerAKASHI Takahiro <takahiro.akashi@linaro.org>2017-06-08 19:17:36 +0900
commitd651c5a1cf72dd0fe2e6b2a3759b13792eced5ff (patch)
treecbf42fbeacf00f2ba513c8f7a4c135260c7a0c81 /arch/arm64/kernel/machine_kexec.c
parent302143b3fe0ed40b3d3de18fd6de47a7f3a96aee (diff)
downloadlinux-aarch64-d651c5a1cf72dd0fe2e6b2a3759b13792eced5ff.tar.gz
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/machine_kexec.c')
-rw-r--r--arch/arm64/kernel/machine_kexec.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index 779a80046066..481f54a866c5 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);
+}