Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9a43c683 authored by Wu Jin's avatar Wu Jin
Browse files

mach-msm: common_log: add common log support 



Add common log code to register kernel log buffer address with
the memory dump driver so that the __log_buf can be collected from
ramdumps without the need of an external System.map file.

Change-Id: I0652e9aaafaea2d5bbddf33da53acd48411a4520
Signed-off-by: default avatarJin Wu <jinw@codeaurora.org>
parent 8c750d7e

drivers/soc/qcom/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -255,6 +255,15 @@ config MSM_MEMORY_DUMP_V2 
	  of deadlocks or cpu hangs these dump regions are captured to

	  give a snapshot of the system at the time of the crash.



config MSM_COMMON_LOG

	bool "MSM Common Log Support"

	depends on MSM_MEMORY_DUMP

	help

	 Use this to export symbols of some log address and variables

	 that need to parse crash dump files to a memory dump table. This

	 table can be used by post analysis tools to extract information

	 from memory when device crashes.



config MSM_WATCHDOG_V2

	bool "MSM Watchdog Support"

	help

drivers/soc/qcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ obj-$(CONFIG_MSM_SCM) += scm.o scm-boot.o 
obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o smd_private.o smd_init_dt.o smsm_debug.o

obj-$(CONFIG_MSM_SMEM) += smem.o smem_debug.o

obj-$(CONFIG_MSM_SMEM_LOGGING) += smem_log.o

obj-$(CONFIG_MSM_COMMON_LOG) += common_log.o

obj-$(CONFIG_MSM_SMP2P) += smp2p.o smp2p_debug.o

obj-$(CONFIG_MSM_SMP2P_TEST) += smp2p_loopback.o smp2p_test.o smp2p_spinlock_test.o

obj-$(CONFIG_MSM_WATCHDOG_V2) += watchdog_v2.o

drivers/soc/qcom/common_log.c

0 → 100644
+44 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/kallsyms.h>

#include <soc/qcom/memory_dump.h>



static void __init common_log_register(void)

{

	struct msm_client_dump dump;

	char **log_bufp;

	uint32_t *log_buf_lenp;



	log_bufp = (char **)kallsyms_lookup_name("log_buf");

	log_buf_lenp = (uint32_t *)kallsyms_lookup_name("log_buf_len");

	if (!log_bufp || !log_buf_lenp) {

		pr_err("%s: Symbol log_buf not found!\n", __func__);

		return;

	}

	dump.id = MSM_LOG_BUF;

	dump.start_addr = virt_to_phys(*log_bufp);

	dump.end_addr = virt_to_phys(*log_bufp + *log_buf_lenp);

	if (msm_dump_tbl_register(&dump))

		pr_err("%s: Could not register log_buf.\n", __func__);

}



static int __init msm_common_log_init(void)

{

	common_log_register();

	return 0;

}

late_initcall(msm_common_log_init);

include/soc/qcom/memory_dump.h

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ enum dump_client_type { 
	MSM_ETM3_REG,

	MSM_TMC0_REG, /* TMC_ETR */

	MSM_TMC1_REG, /* TMC_ETF */

	MSM_LOG_BUF,

	MAX_NUM_CLIENTS,

};