From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Tue, 24 Jan 2017 17:50:01 +0900 Subject: [PATCH v30 07/11] arm64: kdump: add VMCOREINFO's for user-space tools In-Reply-To: <20170124084638.3770-1-takahiro.akashi@linaro.org> References: <20170124084638.3770-1-takahiro.akashi@linaro.org> Message-ID: <20170124085004.3892-6-takahiro.akashi@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 Reviewed-by: James Morse Acked-by: Catalin Marinas --- 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 d56ea8c805a8..84c5761af336 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -17,6 +17,7 @@ #include #include +#include #include #include @@ -275,3 +276,13 @@ void arch_kexec_unprotect_crashkres(void) flush_tlb_all(); } + +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); +} -- 2.11.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg0-f54.google.com ([74.125.83.54]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cVwp7-0000HS-KN for kexec@lists.infradead.org; Tue, 24 Jan 2017 08:51:32 +0000 Received: by mail-pg0-f54.google.com with SMTP id t6so53336690pgt.3 for ; Tue, 24 Jan 2017 00:51:08 -0800 (PST) From: AKASHI Takahiro Subject: [PATCH v30 07/11] arm64: kdump: add VMCOREINFO's for user-space tools Date: Tue, 24 Jan 2017 17:50:01 +0900 Message-Id: <20170124085004.3892-6-takahiro.akashi@linaro.org> In-Reply-To: <20170124084638.3770-1-takahiro.akashi@linaro.org> References: <20170124084638.3770-1-takahiro.akashi@linaro.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: catalin.marinas@arm.com, will.deacon@arm.com Cc: mark.rutland@arm.com, geoff@infradead.org, kexec@lists.infradead.org, AKASHI Takahiro , james.morse@arm.com, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, linux-arm-kernel@lists.infradead.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 Reviewed-by: James Morse Acked-by: Catalin Marinas --- 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 d56ea8c805a8..84c5761af336 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -17,6 +17,7 @@ #include #include +#include #include #include @@ -275,3 +276,13 @@ void arch_kexec_unprotect_crashkres(void) flush_tlb_all(); } + +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); +} -- 2.11.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec