31 Aug, 2016
2 commits
-
Both ETMv3 and ETMv4 drivers are declaring an 'enum etm_addr_type',
creating reduncancy.This patch removes the enumeration from the driver files and adds
it to a common header.Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
The Coresight ETMv4 architecture provides a way to request to keep the
power to the trace unit. This might help to collect the traces without
the need to disable the CPU power management(entering/exiting deeper
idle states).Trace PowerDown Control Register provides powerup request bit which when
set requests the system to retain power to the trace unit and emulate
the powerdown request.Typically, a trace unit drives a signal to the power controller to
request that the trace unit core power domain is powered up. However,
if the trace unit and the CPU are in the same power domain then the
implementation might combine the trace unit power up status with a
signal from the CPU.This patch requests to retain power to the trace unit when active and
to remove when inactive. Note this change will only request but the
behaviour depends on the implementation. However, it matches the
exact behaviour expected when the external debugger is connected with
respect to CPU power states.Cc: Mathieu Poirier
Signed-off-by: Sudeep Holla
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman
04 May, 2016
1 commit
-
Because this operation exceed the range of boolean,
so we should modify q_support to unit8 bit.
drvdata->q_support = BMVAL(etmidr0, 15, 16)Signed-off-by: Li Pengcheng
Signed-off-by: Li Zhong
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman
02 May, 2016
5 commits
-
Adding new mode to limit tracing to kernel or user space.
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
Similarly to ETMv3, moving etmv4_drvdata::enable to an atomic
type that gives the 'mode' of a tracer and prevents multiple,
simultanious access by different subsystems.Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
Splitting and updating the default initialisation for each etmv4
configuration so that it can be called at the beginning of each
session rather than initialisation time only.Since the trace ID isn't expected to change with every session,
moving it with the default tracer initialisation.Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
Similar to what was done on etm3x, splitting driver structure
etmv4_drvdata in two. One half is concerned with the HW
characteristics that are generally static in nature. The other
half deals with user configuration and will change from one
trace session to another.No gain/loss of functionality is incurred from this patch.
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
As with the etm3x driver, sysFS entries are big enough to justify
their own file. As such moving all sysFS related declarations to
a dedicated location.No gain/loss of functionality is incurred from this patch.
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman
06 Aug, 2015
2 commits
-
Like ETTv3, ETMv4 also needs the similar modifications to support Context
ID tracing when PID namespace is enabled.Signed-off-by: Chunyan Zhang
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman -
'ctxid_val' array was used to store the value of ETM context ID comparator
which actually stores the process ID to be traced, so using 'ctxid_pid' as
its name instead make it easier to understand.This patch also changes the ABI, it is normally not allowed, but
fortunately it is a testing ABI and very new for now. Nevertheless,
if you don't think it should be changed, we could always add an alias
for userspace.Signed-off-by: Chunyan Zhang
Reviewed-by: Mark Brown
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman
25 May, 2015
1 commit
-
This driver manages the CoreSight ETMv4 (Embedded Trace Macrocell) IP block
to support HW assisted tracing on ARMv7 and ARMv8 architectures.Signed-off-by: Pratik Patel
Signed-off-by: Kaixu Xia
Signed-off-by: Mathieu Poirier
Signed-off-by: Greg Kroah-Hartman
