| Message ID | 1466563613-31578-3-git-send-email-zhang.chunyan@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi,
[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.7-rc4 next-20160623]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Chunyan-Zhang/Integration-of-function-trace-with-System-Trace-IP-blocks/20160622-115305
config: m32r-allmodconfig (attached as .config)
compiler: m32r-linux-gcc (GCC) 4.9.0
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=m32r
All errors (new ones prefixed by >>):
ERROR: "bad_dma_ops" [sound/soc/fsl/snd-soc-fsl-asrc.ko] undefined!
ERROR: "bad_dma_ops" [sound/soc/atmel/snd-soc-atmel-pcm-pdc.ko] undefined!
ERROR: "bad_dma_ops" [sound/core/snd-pcm.ko] undefined!
ERROR: "dma_common_mmap" [sound/core/snd-pcm.ko] undefined!
ERROR: "__ucmpdi2" [lib/842/842_decompress.ko] undefined!
ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined!
ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined!
ERROR: "__ucmpdi2" [drivers/md/bcache/bcache.ko] undefined!
ERROR: "__ucmpdi2" [drivers/iio/imu/inv_mpu6050/inv-mpu6050.ko] undefined!
>> ERROR: "trace_rm_output" [drivers/hwtracing/stm/stm_ftrace.ko] undefined!
>> ERROR: "trace_add_output" [drivers/hwtracing/stm/stm_ftrace.ko] undefined!
ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined!
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi,
[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.7-rc4 next-20160623]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Chunyan-Zhang/Integration-of-function-trace-with-System-Trace-IP-blocks/20160622-115305
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=m68k
All errors (new ones prefixed by >>):
drivers/built-in.o: In function `stm_ftrace_unlink':
>> ftrace.c:(.text+0x12197ac): undefined reference to `trace_rm_output'
drivers/built-in.o: In function `stm_ftrace_link':
>> ftrace.c:(.text+0x12197be): undefined reference to `trace_add_output'
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/drivers/hwtracing/stm/Kconfig b/drivers/hwtracing/stm/Kconfig index 847a39b..f4c69d2 100644 --- a/drivers/hwtracing/stm/Kconfig +++ b/drivers/hwtracing/stm/Kconfig @@ -39,4 +39,14 @@ config STM_SOURCE_HEARTBEAT If you want to send heartbeat messages over STM devices, say Y. +config STM_SOURCE_FTRACE + tristate "Copy the output from kernel Ftrace to STM engine" + help + This option can be used to copy the output from kernel Ftrace + to STM engine. Enabling this option will introduce a slight + timing effect. + + If you want to send kernel Ftrace messages over STM devices, + say Y. + endif diff --git a/drivers/hwtracing/stm/Makefile b/drivers/hwtracing/stm/Makefile index a9ce3d4..3abd84c 100644 --- a/drivers/hwtracing/stm/Makefile +++ b/drivers/hwtracing/stm/Makefile @@ -6,6 +6,8 @@ obj-$(CONFIG_STM_DUMMY) += dummy_stm.o obj-$(CONFIG_STM_SOURCE_CONSOLE) += stm_console.o obj-$(CONFIG_STM_SOURCE_HEARTBEAT) += stm_heartbeat.o +obj-$(CONFIG_STM_SOURCE_FTRACE) += stm_ftrace.o stm_console-y := console.o stm_heartbeat-y := heartbeat.o +stm_ftrace-y := ftrace.o diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing/stm/ftrace.c new file mode 100644 index 0000000..ccce91e --- /dev/null +++ b/drivers/hwtracing/stm/ftrace.c @@ -0,0 +1,77 @@ +/* + * Simple kernel driver to link kernel Ftrace and an STM device + * Copyright (c) 2016, Linaro Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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/stm.h> +#include <linux/trace_output_stm.h> + +#define STM_FTRACE_NR_CHANNELS 1 + +static int stm_ftrace_link(struct stm_source_data *data); +static void stm_ftrace_unlink(struct stm_source_data *data); +static void stm_ftrace_write(struct stm_source_data *data, const char *buf, + unsigned int len, unsigned int chan); + +static struct stm_ftrace ftrace = { + .data = { + .name = "ftrace", + .nr_chans = STM_FTRACE_NR_CHANNELS, + .link = stm_ftrace_link, + .unlink = stm_ftrace_unlink, + }, + .write = stm_ftrace_write, +}; + +/** + * stm_ftrace_write() - write data to STM via 'stm_ftrace' source + * @buf: buffer containing the data packet + * @len: length of the data packet + * @chan: offset above the start channel number allocated to 'stm_ftrace' + */ +static void notrace stm_ftrace_write(struct stm_source_data *data, + const char *buf, unsigned int len, + unsigned int chan) +{ + stm_source_write(data, chan, buf, len); +} + +static int stm_ftrace_link(struct stm_source_data *data) +{ + struct stm_ftrace *sf = container_of(data, struct stm_ftrace, data); + + trace_add_output(sf); + + return 0; +} + +static void stm_ftrace_unlink(struct stm_source_data *data) +{ + trace_rm_output(); +} + +static int __init stm_ftrace_init(void) +{ + return stm_source_register_device(NULL, &ftrace.data); +} + +static void __exit stm_ftrace_exit(void) +{ + stm_source_unregister_device(&ftrace.data); +} + +module_init(stm_ftrace_init); +module_exit(stm_ftrace_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("stm_ftrace driver"); +MODULE_AUTHOR("Chunyan Zhang <zhang.chunyan@linaro.org>");
This patch adds a driver that models itself as an stm_source and who's sole purpose is to be an interface to the rest of the kernel. Once the stm and stm_source have been linked via sysfs, everything that is passed to the interface will endup in the STM trace engine. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> --- drivers/hwtracing/stm/Kconfig | 10 ++++++ drivers/hwtracing/stm/Makefile | 2 ++ drivers/hwtracing/stm/ftrace.c | 77 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 89 insertions(+) create mode 100644 drivers/hwtracing/stm/ftrace.c