From: takahiro.akashi@linaro.org (AKASHI Takahiro)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v28 5/9] arm64: kdump: add VMCOREINFO's for user-space tools
Date: Thu, 24 Nov 2016 18:58:06 +0900 [thread overview]
Message-ID: <20161124095809.7092-4-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20161124095523.6972-1-takahiro.akashi@linaro.org>
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>
---
arch/arm64/kernel/machine_kexec.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index c60346d..994fe0b 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c
@@ -17,6 +17,7 @@
#include <asm/cacheflush.h>
#include <asm/cpu_ops.h>
+#include <asm/memory.h>
#include <asm/mmu_context.h>
#include "cpu-reset.h"
@@ -260,3 +261,13 @@ void machine_crash_shutdown(struct pt_regs *regs)
pr_info("Starting crashdump kernel...\n");
}
+
+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);
+}
--
2.10.0
next prev parent reply other threads:[~2016-11-24 9:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-24 9:55 [PATCH v28 0/9] arm64: add kdump support AKASHI Takahiro
2016-11-24 9:57 ` [PATCH v28 1/9] memblock: add memblock_cap_memory_range() AKASHI Takahiro
2016-11-24 10:26 ` Catalin Marinas
2016-11-24 9:58 ` [PATCH v28 2/9] arm64: limit memory regions based on DT property, usable-memory-range AKASHI Takahiro
2016-11-24 9:58 ` [PATCH v28 3/9] arm64: kdump: reserve memory for crash dump kernel AKASHI Takahiro
2016-11-24 9:58 ` [PATCH v28 4/9] arm64: kdump: implement machine_crash_shutdown() AKASHI Takahiro
2016-11-28 15:04 ` Catalin Marinas
2016-11-29 5:47 ` AKASHI Takahiro
2016-11-24 9:58 ` AKASHI Takahiro [this message]
2016-11-24 9:58 ` [PATCH v28 6/9] arm64: kdump: provide /proc/vmcore file AKASHI Takahiro
2016-11-24 9:58 ` [PATCH v28 7/9] arm64: kdump: enable kdump in defconfig AKASHI Takahiro
2016-11-24 9:58 ` [PATCH v28 8/9] Documentation: kdump: describe arm64 port AKASHI Takahiro
2016-11-24 9:59 ` [PATCH v28 9/9] Documentation: dt: chosen properties for arm64 kdump AKASHI Takahiro
2016-11-24 17:14 ` Catalin Marinas
2016-11-30 20:44 ` Rob Herring
2016-11-25 16:20 ` [PATCH v28 0/9] arm64: add kdump support Catalin Marinas
2016-11-29 11:05 ` Will Deacon
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