.
This patch corrects the link removal code.
Fixes: 73274abb6557 ("coresight: cti: Add in sysfs links to other coresight
devices")
Reported-by: Tingwei Zhang
Signed-off-by: Mike Leach
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/coresight-cti.c | 9 ++---
1 file
Yan
Cc: Alexander Shishkin
Cc: Randy Dunlap
Cc: Suzuki K Poulose
Cc: Greg Kroah-Hartman
Cc: Russell King
Co-developed-by: Mian Yousaf Kaukab
Signed-off-by: Mian Yousaf Kaukab
Signed-off-by: Kim Phillips
Signed-off-by: Tingwei Zhang
Tested-by: Mike Leach
Reviewed-by: Mathieu Poirier
Signed-off-by: Tingwei Zhang
Tested-by: Mike Leach
Suggested-by: Suzuki K Poulose
---
drivers/hwtracing/coresight/Kconfig | 5 +-
drivers/hwtracing/coresight/Makefile | 4 +-
...resight-etm4x.c => coresight-etm4x-core.c} | 84 ++-
3 files changed,
a MODULE_DEVICE_TABLE for autoloading on boot
Cc: Mathieu Poirier
Cc: Leo Yan
Cc: Alexander Shishkin
Cc: Randy Dunlap
Cc: Suzuki K Poulose
Cc: Greg Kroah-Hartman
Cc: Russell King
Signed-off-by: Kim Phillips
Signed-off-by: Tingwei Zhang
Reviewed-by: Mike Leach
---
drivers/hwtracing/coresight/Kconfig
When coresight device is in an active session, driver module of
that device should not be removed. Use try_get_module() in
coresight_grab_device() to prevent module to be unloaded.
Use get_device()/put_device() to protect device data
in the middle of active session.
Signed-off-by: Tingwei Zhang
: Greg Kroah-Hartman
Cc: Russell King
Signed-off-by: Kim Phillips
Signed-off-by: Tingwei Zhang
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/coresight-etm-perf.h | 2 +-
drivers/hwtracing/coresight/coresight-priv.h | 2 +-
include/linux
When coresight_build_path() fails on all the cpus, etm_setup_aux
calls etm_free_aux() to free allocated event_data.
WARN_ON(cpumask_empty(mask) will be triggered since cpu mask is empty.
Check event_data->snk_config is not NULL first to avoid this
warning.
Signed-off-by: Tingwei Zhang
Revie
Define a MODULE_DEVICE_TABLE for cpu_debug so module can
be auto loaded on boot.
Signed-off-by: Tingwei Zhang
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/coresight-cpu-debug.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers
From: Mian Yousaf Kaukab
Export symbols used among coresight modules.
Signed-off-by: Mian Yousaf Kaukab
Signed-off-by: Tingwei Zhang
Tested-by: Mike Leach
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/coresight-etm-perf.c | 1 +
drivers
Add coresight prefix to make it specific. It will be a export symbol.
Signed-off-by: Mian Yousaf Kaukab
Signed-off-by: Tingwei Zhang
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/coresight-etb10.c | 2 +-
drivers/hwtracing/coresight/coresight
-by: Kim Phillips
Signed-off-by: Tingwei Zhang
Tested-by: Mike Leach
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/Kconfig | 5 -
drivers/hwtracing/coresight/coresight-stm.c | 20 +++-
2 files changed, 23 insertions(+), 2
tion to register catu ops
Mike Leach (2):
coresight: cti: Fix remove sysfs link error
coresight: cti: Fix bug clearing sysfs links on callback
Tingwei Zhang (12):
coresight: cpu_debug: add module name in Kconfig
coresight: cpu_debug: define MODULE_DEVICE_TABLE
coresight: add coresigh
Provide name of cpu_debug module in Kconfig help section.
Signed-off-by: Tingwei Zhang
Tested-by: Mike Leach
Reviewed-by: Suzuki K Poulose
Reviewed-by: Mathieu Poirier
---
drivers/hwtracing/coresight/Kconfig | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/hwtracing/coresight
wered has been checked to be true with spinlock holded.
CTI is powered and can be programmed until spinlock is released.
Fixes: 6a0953ce7de9 ("coresight: cti: Add CPU idle pm notifer to CTI devices")
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/coresight/coresight-cti.c | 17 +-
] cpuhp_invoke_callback+0x84/0x1e0
[ 105.800814] notify_cpu_starting+0x9c/0xb8
[ 105.800834] secondary_start_kernel+0xd8/0x164
[ 105.800933] CPU1: Booted secondary processor 0x000100 [0x517f803c]
Fixes: e9b880581d55 ("coresight: cti: Add CPU Hotplug handling to CTI driver")
Signed-off-by: Tin
/0x18
Fixes: e9b880581d55 ("coresight: cti: Add CPU Hotplug handling to CTI driver")
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/coresight/coresight-cti.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-cti.c
b/drivers
On Thu, Aug 13, 2020 at 12:49:25AM +0800, Mathieu Poirier wrote:
> On Tue, Aug 11, 2020 at 11:57:20AM +0800, Tingwei Zhang wrote:
> > Ftrace has ability to export trace packets to other destination.
> > Currently, only function trace can be exported. This series extends the
>
To avoid mixup of packets from differnt ftrace packets simultaneously,
use different channel for packets from different CPU.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff
Set flags for trace_export. Export function trace, event trace
and trace marker to stm.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing
function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.
Tingwei Zhang (6):
stm class: ftrace: change dependency to TRACING
tracing: add flag to control different traces
tracing: add
More traces like event trace or trace marker will be supported.
Add flag for difference traces, so that they can be controlled
separately. Move current function trace to it's own flag
instead of global ftrace enable flag.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
Only function traces can be exported to other destinations currently.
This patch exports event trace as well. Move trace export related
function to the beginning of file so other trace can call
trace_process_export() to export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
We will support copying event trace to STM. Change
STM_SOURCE_FTRACE to depend on TRACING since we will
support multiple tracers.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff
Add the support to route trace_marker buffer to other destination
via trace_export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
include/linux/trace.h | 1 +
kernel/trace/trace.c | 9 +
2 files changed, 10 insertions(+)
diff --git a/include/linux/trace.h b
On Tue, Aug 11, 2020 at 12:03:33PM +0800, Steven Rostedt wrote:
> On Tue, 11 Aug 2020 11:49:46 +0800
> Tingwei Zhang wrote:
>
> > On Tue, Aug 11, 2020 at 11:19:54AM +0800, Steven Rostedt wrote:
> > > On Tue, 11 Aug 2020 11:04:18 +0800
> > > Tingwei Zhang wrote:
Set flags for trace_export. Export function trace, event trace
and trace marker to stm.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing
To avoid mixup of packets from differnt ftrace packets simultaneously,
use different channel for packets from different CPU.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff
function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.
Tingwei Zhang (6):
stm class: ftrace: change dependency to TRACING
tracing: add flag to control different traces
tracing: add
We will support copying event trace to STM. Change
STM_SOURCE_FTRACE to depend on TRACING since we will
support multiple tracers.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff
More traces like event trace or trace marker will be supported.
Add flag for difference traces, so that they can be controlled
separately. Move current function trace to it's own flag
instead of global ftrace enable flag.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
Only function traces can be exported to other destinations currently.
This patch exports event trace as well. Move trace export related
function to the beginning of file so other trace can call
trace_process_export() to export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
Add the support to route trace_marker buffer to other destination
via trace_export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
include/linux/trace.h | 1 +
kernel/trace/trace.c | 9 +
2 files changed, 10 insertions(+)
diff --git a/include/linux/trace.h b
Hi Steven,
On Tue, Jul 28, 2020 at 09:33:53AM +0800, Tingwei Zhang wrote:
> Ftrace has ability to export trace packets to other destination.
> Currently, only function trace can be exported. This series extends the
> support to event trace and trace_maker. STM is one possible de
On Wed, Jul 29, 2020 at 01:13:10PM +0800, Sai Prakash Ranjan wrote:
> etm4_count keeps track of number of ETMv4 registered and on some systems,
> a race is observed on etm4_count variable which can lead to multiple calls
> to cpuhp_setup_state_nocalls_cpuslocked(). This function internally calls
>
Add the support to route trace_marker buffer to other destination
via trace_export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
include/linux/trace.h | 1 +
kernel/trace/trace.c | 9 +
2 files changed, 10 insertions(+)
diff --git a/include/linux/trace.h b
function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.
Tingwei Zhang (6):
stm class: ftrace: change dependency to TRACING
tracing: add flag to control different traces
tracing: add
To avoid mixup of packets from differnt ftrace packets simultaneously,
use different channel for packets from different CPU.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff
More traces like event trace or trace marker will be supported.
Add flag for difference traces, so that they can be controlled
separately. Move current function trace to it's own flag
instead of global ftrace enable flag.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
We will support copying event trace to STM. Change
STM_SOURCE_FTRACE to depend on TRACING since we will
support multiple tracers.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff
Set flags for trace_export. Export function trace, event trace
and trace marker to stm.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware)
---
drivers/hwtracing/stm/ftrace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing
Only function traces can be exported to other destinations currently.
This patch exports event trace as well. Move trace export related
function to the beginning of file so other trace can call
trace_process_export() to export.
Signed-off-by: Tingwei Zhang
Reviewed-by: Steven Rostedt (VMware
Hi Steve,
On Tue, Jul 28, 2020 at 02:45:50AM +0800, Steven Rostedt wrote:
> On Sun, 26 Jul 2020 10:59:27 +0800
> Tingwei Zhang wrote:
>
>
> > diff --git a/include/linux/trace.h b/include/linux/trace.h
> > index 7fd86d3c691f..d2fdf9be84b5 100644
> > --- a/include/l
Hi Steve,
On Tue, Jul 28, 2020 at 03:08:12AM +0800, Steven Rostedt wrote:
> On Sun, 26 Jul 2020 10:59:31 +0800
> Tingwei Zhang wrote:
>
> > --- a/drivers/hwtracing/stm/ftrace.c
> > +++ b/drivers/hwtracing/stm/ftrace.c
> > @@ -37,8 +37,9 @@ static void notrace
&
Set flags for trace_export. Export function trace, event trace
and trace marker to stm.
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/stm/ftrace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hwtracing/stm/ftrace.c b/drivers/hwtracing/stm/ftrace.c
index ce868e095410
More traces like event trace or trace marker will be supported.
Add flag for difference traces, so that they can be controlled
separately. Move current function trace to it's own flag
instead of global ftrace enable flag.
Signed-off-by: Tingwei Zhang
---
include/linux/trace.h | 5 +
kernel
Only function traces can be exported to other destinations currently.
This patch exports event trace as well. Move trace export related
function to the beginning of file so other trace can call
trace_process_export() to export.
Signed-off-by: Tingwei Zhang
---
include/linux/trace.h | 1
To avoid mixup of packets from differnt ftrace packets simultaneously,
use different channel for packets from different CPU.
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/stm/ftrace.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/stm/ftrace.c b
Add the support to route trace_marker buffer to other destination
via trace_export.
Signed-off-by: Tingwei Zhang
---
include/linux/trace.h | 1 +
kernel/trace/trace.c | 9 +
2 files changed, 10 insertions(+)
diff --git a/include/linux/trace.h b/include/linux/trace.h
index 91f6f1c0f2db
We will support copying event trace to STM. Change
STM_SOURCE_FTRACE to depend on TRACING since we will
support multiple tracers.
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/stm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/stm/Kconfig b
different
CPUs together.
Change from v1:
All changes are suggested by Steven Rostedt.
User seperate flag to control function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.
Tingwei Zhang (6
To avoid mixup of packets from differnt ftrace packets simultaneously,
use different channel for packets from different CPU.
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/stm/ftrace.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/hwtracing/stm/ftrace.c b
Only function traces can be exported to other destinations currently.
This patch exports event trace as well.
Signed-off-by: Tingwei Zhang
---
kernel/trace/trace.c | 24 +---
1 file changed, 13 insertions(+), 11 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace
Add the support to route trace_marker buffer to other destination
via trace_export.
Signed-off-by: Tingwei Zhang
---
kernel/trace/trace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index aef6330836e2..ac18e0ee9246 100644
--- a/kernel/trace
We will support copying event trace to STM. Change
STM_SOURCE_FTRACE to depend on TRACING since we will
support multiple tracers.
Signed-off-by: Tingwei Zhang
---
drivers/hwtracing/stm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/stm/Kconfig b
different
CPUs together.
Tingwei Zhang (4):
stm class: ftrace: change dependency to TRACING
tracing: add trace_export support for event trace
tracing: add trace_export support for trace_marker
stm class: ftrace: use different channel accroding to CPU
drivers/hwtracing/stm/Kconfig | 2
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