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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231116173301.708873-9-u.kleine-koenig@pengutronix.de
CCITMIN is a 12 bit field and doesn't fit in a u8, so extend it to u16.
This probably wasn't an issue previously because values higher than 255
never occurred.
But since commit 4aff040bcc8d ("coresight: etm: Override TRCIDR3.CCITMIN
on errata affected cpus"), a comparison with 256 was done to enable the
errata, generating the following W=1 build error:
coresight-etm4x-core.c:1188:24: error: result of comparison of
constant 256 with expression of type 'u8' (aka 'unsigned char') is
always false [-Werror,-Wtautological-constant-out-of-range-compare]
if (drvdata->ccitmin == 256)
Cc: stable@vger.kernel.org
Fixes: 2e1cdfe184b5 ("coresight-etm4x: Adding CoreSight ETM4x driver")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310302043.as36UFED-lkp@intel.com/
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231101115206.70810-1-james.clark@arm.com
Correct the property name of the DSB MSR number that needs to be
read in TPDM driver. The right property name is
"qcom,dsb-msrs-num".
Fixes: 350ba15ae187 ("coresight-tpdm: Add nodes for dsb msr support")
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
[ Fix checkpatch failure in the commit description ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1698128353-31157-1-git-send-email-quic_taozha@quicinc.com
In the current implementation, there're 4*4MiB trace buffer and hardware
will fill the buffer one by one. The driver will get notified if one
buffer is full and then copy data to the AUX buffer. If there's no
enough room for the next trace buffer, we'll commit the AUX buffer to
the perf core and try to apply a new one. In a typical configuration
the AUX buffer will be 16MiB, so we'll commit the data after the whole
AUX buffer is occupied. Then the driver cannot apply a new AUX buffer
immediately until the committed data is consumed by userspace and then
there's room in the AUX buffer again.
This patch tries to optimize this by commit the data after one single
trace buffer is filled. Since there's still room in the AUX buffer,
driver can apply a new one without failure and don't need to wait for
the userspace to consume the data.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-4-yangyicong@huawei.com
On trace end we disable the hardware but leave the interrupt
unmasked. Mask the interrupt to make the process reverse to
the start. No actual issue since hardware should send no
interrupt after disabled.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-2-yangyicong@huawei.com
Add the nodes for DSB subunit MSR(mux select register) support.
The TPDM MSR (mux select register) interface is an optional
interface and associated bank of registers per TPDM subunit.
The intent of mux select registers is to control muxing structures
driving the TPDM’s’ various subunit interfaces.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-14-git-send-email-quic_taozha@quicinc.com
Add property "qcom,dsb-msrs-num" to support DSB(Discrete Single
Bit) MSR(mux select register) for TPDM. It specifies the number
of MSR registers supported by the DSB TDPM.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-13-git-send-email-quic_taozha@quicinc.com
Add nodes to configure the timestamp request based on input
pattern match. Each TPDM that support DSB subunit has maximum of
n(n<7) TPR registers to configure value for timestamp request
based on input pattern match. Eight 32 bit registers providing
DSB interface timestamp request pattern match comparison. And
each TPDM that support DSB subunit has maximum of m(m<7) TPMR
registers to configure pattern mask for timestamp request. Eight
32 bit registers providing DSB interface timestamp request
pattern match mask generation. Add nodes to enable/disable
pattern timestamp and set pattern timestamp type.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-12-git-send-email-quic_taozha@quicinc.com
Add nodes to configure trigger pattern and trigger pattern mask.
Each DSB subunit TPDM has maximum of n(n<7) XPR registers to
configure trigger pattern match output. Eight 32 bit registers
providing DSB interface trigger output pattern match comparison.
And each DSB subunit TPDM has maximum of m(m<7) XPMR registers to
configure trigger pattern mask match output. Eight 32 bit
registers providing DSB interface trigger output pattern match
mask.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-11-git-send-email-quic_taozha@quicinc.com
Add the nodes to set value for DSB edge control and DSB edge
control mask. Each DSB subunit TPDM has maximum of n(n<16) EDCR
resgisters to configure edge control. DSB edge detection control
00: Rising edge detection
01: Falling edge detection
10: Rising and falling edge detection (toggle detection)
And each DSB subunit TPDM has maximum of m(m<8) ECDMR registers to
configure mask. Eight 32 bit registers providing DSB interface
edge detection mask control.
Add the nodes to configure DSB edge control and DSB edge control
mask. Each DSB subunit TPDM maximum of 256 edge detections can be
configured. The index and value sysfs files need to be paired and
written to order. The index sysfs file is to set the index number
of the edge detection which needs to be configured. And the value
sysfs file is to set the control or mask for the edge detection.
DSB edge detection control should be set as the following values.
00: Rising edge detection
01: Falling edge detection
10: Rising and falling edge detection (toggle detection)
And DSB edge mask should be set as 0 or 1.
Each DSB subunit TPDM has maximum of n(n<16) EDCR resgisters to
configure edge control. And each DSB subunit TPDM has maximum of
m(m<8) ECDMR registers to configure mask.
Add the nodes to read a set of the edge control value and mask
of the DSB in TPDM.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-10-git-send-email-quic_taozha@quicinc.com
Add node to set and show programming mode for TPDM DSB subunit.
Once the DSB programming mode is set, it will be written to the
register DSB_CR.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-9-git-send-email-quic_taozha@quicinc.com
The nodes are needed to set or show the trigger timestamp and
trigger type. This change is to add these nodes to achieve these
function.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-8-git-send-email-quic_taozha@quicinc.com
TPDM device need a node to reset the configurations and status of
it. This change provides a node to reset the configurations and
disable the TPDM if it has been enabled.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-7-git-send-email-quic_taozha@quicinc.com
DSB is used for monitoring “events”. Events are something that
occurs at some point in time. It could be a state decode, the
act of writing/reading a particular address, a FIFO being empty,
etc. This decoding of the event desired is done outside TPDM.
DSB subunit need to be configured in enablement and disablement.
A struct that specifics associated to dsb dataset is needed. It
saves the configuration and parameters of the dsb datasets. This
change is to add this struct and initialize the configuration of
DSB subunit.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-6-git-send-email-quic_taozha@quicinc.com
Add property "qcom,dsb-elem-size" to support DSB(Discrete Single
Bit) element for TPDM. The associated aggregator will read this
size before it is enabled. DSB element size currently only
supports 32-bit and 64-bit.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-3-git-send-email-quic_taozha@quicinc.com
Currently TMC-ETR automatically selects the buffer mode from all available
methods in the following sequentially fallback manner - also in that order.
1. FLAT mode with or without IOMMU
2. TMC-ETR-SG (scatter gather) mode when available
3. CATU mode when available
But this order might not be ideal for all situations. For example if there
is a CATU connected to ETR, it may be better to use TMC-ETR scatter gather
method, rather than CATU. But hard coding such order changes will prevent
us from testing or using a particular mode. This change provides following
new sysfs tunables for the user to control TMC-ETR buffer mode explicitly,
if required. This adds following new sysfs files for buffer mode selection
purpose explicitly in the user space.
/sys/bus/coresight/devices/tmc_etr<N>/buf_modes_available
/sys/bus/coresight/devices/tmc_etr<N>/buf_mode_preferred
$ cat buf_modes_available
auto flat tmc-sg catu ------------------> Supported TMC-ETR buffer modes
$ echo catu > buf_mode_preferred -------> Explicit buffer mode request
But explicit user request has to be within supported ETR buffer modes only.
These sysfs interface files are exclussive to ETR, and hence these are not
available for other TMC devices such as ETB or ETF etc.
A new auto' mode (i.e ETR_MODE_AUTO) has been added to help fallback to the
existing default behaviour, when user provided preferred buffer mode fails.
ETR_MODE_FLAT and ETR_MODE_AUTO are always available as preferred modes.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
[Fixup year in sysfs ABI documentation]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230818082112.554638-1-anshuman.khandual@arm.com
When cycle counting is enabled, we use a default threshold value i.e 0x100
for the instruction trace cycle counting.
This patch makes the cycle threshold user configurable via perf event
attributes( 'cc_threshold' => event->attr.config3[11:0] ), falling back
to the current default if unspecified.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230921033631.1298723-3-anshuman.khandual@arm.com
This work arounds errata 1490853 on Cortex-A76, and Neoverse-N1, errata
1491015 on Cortex-A77, errata 1502854 on Cortex-X1, and errata 1619801 on
Neoverse-V1, based affected cpus, where software read for TRCIDR3.CCITMIN
field in ETM gets an wrong value.
If software uses the value returned by the TRCIDR3.CCITMIN register field,
then it will limit the range which could be used for programming the ETM.
In reality, the ETM could be programmed with a much smaller value than what
is indicated by the TRCIDR3.CCITMIN field and still function correctly.
If software reads the TRCIDR3.CCITMIN register field, corresponding to the
instruction trace counting minimum threshold, observe the value 0x100 or a
minimum cycle count threshold of 256. The correct value should be 0x4 or a
minimum cycle count threshold of 4.
This work arounds the problem via storing 4 in drvdata->ccitmin on affected
systems where the TRCIDR3.CCITMIN has been 256, thus preserving cycle count
threshold granularity.
These errata information has been updated in Documentation/arch/arm64/silicon-errata.rst,
but without their corresponding configs because these have been implemented
directly in the driver.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
[ Fixed location of silicon-errata.rst in commit description ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230921033631.1298723-2-anshuman.khandual@arm.com
TRBE coresight devices do not need regular connections information, as the
paths get built between all percpu source and their respective percpu sink
devices. Please refer 'commit 2cd87a7b293d ("coresight: core: Add support
for dedicated percpu sinks")' which added support for percpu sink devices.
coresight_register() expect device connections via the platform_data. TRBE
devices do not have any graph connections and thus is empty. With upcoming
ACPI support for TRBE, we do not get a real acpi_device and thus
coresight_get_platform_dat() will end up in failures. Hence this allocates
a zeroed coresight_platform_data structure and assigns that back into the
device.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230829135405.1159449-2-anshuman.khandual@arm.com
I haven't done any meaningful work for a long while on Arm CoreSight and
it's unlikely I'll be able to do related work in the future.
Remove myself from the Arm CoreSight "Reviewers" list.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230904092311.389112-1-leo.yan@linaro.org
In smb_reset_buffer, the sdb->buf_hw_base variable is uninitialized
before use, which initializes it in smb_init_data_buffer. And the SMB
regiester are set in smb_config_inport.
So move the call after smb_config_inport.
Fixes: 06f5c2926aaa ("drivers/coresight: Add UltraSoc System Memory Buffer driver")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231114133346.30489-4-hejunhao3@huawei.com
The SMB dirver register the enable/disable sysfs interface in function
smb_register_sink(), however the buffer depends on the following
configuration to work well. So it'll be possible for user to access an
unreset one.
Move the config buffer operation to before register_sink().
Ignore the return value, if smb_config_inport() fails. That will
cause the hardwares disable trace path to fail, should not affect
SMB driver remove. So we make smb_remove() return success,
Fixes: 06f5c2926aaa ("drivers/coresight: Add UltraSoc System Memory Buffer driver")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231114133346.30489-3-hejunhao3@huawei.com
When we to enable the SMB by perf, the perf sched will call perf_ctx_lock()
to close system preempt in event_function_call(). But SMB::enable_smb() use
mutex to lock the critical section, which may sleep.
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 153023, name: perf
preempt_count: 2, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 0
hardirqs last enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<ffffa2983f5c5f40>] copy_process+0xae8/0x2b48
softirqs last enabled at (0): [<ffffa2983f5c5f40>] copy_process+0xae8/0x2b48
softirqs last disabled at (0): [<0000000000000000>] 0x0
CPU: 2 PID: 153023 Comm: perf Kdump: loaded Tainted: G W O 6.5.0-rc4+ #1
Call trace:
...
__mutex_lock+0xbc/0xa70
mutex_lock_nested+0x34/0x48
smb_update_buffer+0x58/0x360 [ultrasoc_smb]
etm_event_stop+0x204/0x2d8 [coresight]
etm_event_del+0x1c/0x30 [coresight]
event_sched_out+0x17c/0x3b8
group_sched_out.part.0+0x5c/0x208
__perf_event_disable+0x15c/0x210
event_function+0xe0/0x230
remote_function+0xb4/0xe8
generic_exec_single+0x160/0x268
smp_call_function_single+0x20c/0x2a0
event_function_call+0x20c/0x220
_perf_event_disable+0x5c/0x90
perf_event_for_each_child+0x58/0xc0
_perf_ioctl+0x34c/0x1250
perf_ioctl+0x64/0x98
...
Use spinlock to replace mutex to control driver data access to one at a
time. The function copy_to_user() may sleep, it cannot be in a spinlock
context, so we can't simply replace it in smb_read(). But we can ensure
that only one user gets the SMB device fd by smb_open(), so remove the
locks from smb_read() and buffer synchronization is guaranteed by the user.
Fixes: 06f5c2926aaa ("drivers/coresight: Add UltraSoc System Memory Buffer driver")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231114133346.30489-2-hejunhao3@huawei.com
This reference uses a glob pattern to match multiple files, but the
asterisk was escaped as \* in order to not be interpreted by sphinx
as reStructuredText markup.
refcheckdocs/documentation-file-ref-check doesn't know about rST syntax
and tries to interpret the \* literally (instead of as a glob).
We can work around the warning by putting the Documentation reference
inside double backticks (``..``), which allows us to not escape the
asterisk.
Fixes: c06475910b52 ("Documentation: coresight: Escape coresight bindings file wildcard")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Rob Herring <robh@kernel.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-next@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231022185806.919434-1-vegard.nossum@oracle.com
PTT is an uncore PMU and shouldn't be attached to any task. Block
the usage in pmu::event_init().
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-5-yangyicong@huawei.com
Handle the trace interrupt in the hardirq context, make sure the irq
core won't threaded it by declaring IRQF_NO_THREAD and userspace won't
balance it by declaring IRQF_NOBALANCING. Otherwise we may violate the
synchronization requirements of the perf core, referenced to the
change of arm-ccn PMU
commit 0811ef7e2f54 ("bus: arm-ccn: fix PMU interrupt flags").
In the interrupt handler we mainly doing 2 things:
- Copy the data from the local DMA buffer to the AUX buffer
- Commit the data in the AUX buffer
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[ Fixed commit description to suppress checkpatch warning ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-3-yangyicong@huawei.com
When start trace with perf option "-C $cpu" and immediately stop it
with SIGTERM or others, the perf core will invoke pmu::read() while
the driver doesn't implement it. Add a dummy pmu::read() to avoid
any issues.
Fixes: ff0de066b463 ("hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231010084731.30450-6-yangyicong@huawei.com
Partially revert the change in commit 6148652807ba ("coresight: Enable
and disable helper devices adjacent to the path") which changed the bare
call from source_ops(csdev)->enable() to coresight_enable_source() for
Perf sessions. It was missed that coresight_enable_source() is
specifically for the sysfs interface, rather than being a generic call.
This interferes with the sysfs reference counting to cause the following
crash:
$ perf record -e cs_etm/@tmc_etr0/ -C 0 &
$ echo 1 > /sys/bus/coresight/devices/tmc_etr0/enable_sink
$ echo 1 > /sys/bus/coresight/devices/etm0/enable_source
$ echo 0 > /sys/bus/coresight/devices/etm0/enable_source
Unable to handle kernel NULL pointer dereference at virtual
address 00000000000001d0
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
...
Call trace:
etm4_disable+0x54/0x150 [coresight_etm4x]
coresight_disable_source+0x6c/0x98 [coresight]
coresight_disable+0x74/0x1c0 [coresight]
enable_source_store+0x88/0xa0 [coresight]
dev_attr_store+0x20/0x40
sysfs_kf_write+0x4c/0x68
kernfs_fop_write_iter+0x120/0x1b8
vfs_write+0x2dc/0x3b0
ksys_write+0x70/0x108
__arm64_sys_write+0x24/0x38
invoke_syscall+0x50/0x128
el0_svc_common.constprop.0+0x104/0x130
do_el0_svc+0x40/0xb8
el0_svc+0x2c/0xb8
el0t_64_sync_handler+0xc0/0xc8
el0t_64_sync+0x1a4/0x1a8
Code: d53cd042 91002000 b9402a81 b8626800 (f940ead5)
---[ end trace 0000000000000000 ]---
This commit linked below also fixes the issue, but has unlocked updates
to the mode which could potentially race. So until we come up with a
more complete solution that takes all locking and interaction between
both modes into account, just revert back to the old behavior for Perf.
Reported-by: Junhao He <hejunhao3@huawei.com>
Closes: https://lore.kernel.org/linux-arm-kernel/20230921132904.60996-1-hejunhao3@huawei.com/
Fixes: 6148652807ba ("coresight: Enable and disable helper devices adjacent to the path")
Tested-by: Junhao He <hejunhao3@huawei.com>
Signed-off-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20231006131452.646721-1-james.clark@arm.com
etm4_platform_driver (which lives in ".data" contains a reference to
etm4_remove_platform_dev(). So the latter must not be marked with __exit
which results in the function being discarded for a build with
CONFIG_CORESIGHT_SOURCE_ETM4X=y which in turn makes the remove pointer
contain invalid data.
etm4x_amba_driver referencing etm4_remove_amba() has the same issue.
Drop the __exit annotations for the two affected functions and a third
one that is called by the other two.
For reasons I don't understand this isn't catched by building with
CONFIG_DEBUG_SECTION_MISMATCH=y.
Fixes: c23bc382ef0e ("coresight: etm4x: Refactor probing routine")
Fixes: 5214b563588e ("coresight: etm4x: Add support for sysreg only devices")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/all/20230929081540.yija47lsj35xtj4v@pengutronix.de/
Link: https://lore.kernel.org/r/20230929081637.2377335-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
The commands should be sorted inside the group definition.
Fix the ordering so we won't get following warning:
WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg))
Link: https://lore.kernel.org/regressions/2fa930bb-54dd-4942-a88d-05a47c8e9731@gmail.com/
Link: https://lore.kernel.org/linux-wireless/CAHk-=wix6kqQ5vHZXjOPpZBfM7mMm9bBZxi2Jh7XnaKCqVf94w@mail.gmail.com/
Fixes: b6e3d1ba4fcf ("wifi: iwlwifi: mvm: implement new firmware API for statistics")
Tested-by: Niklāvs Koļesņikovs <pinkflames.linux@gmail.com>
Tested-by: Damian Tometzki <damian@riscv-rocks.de>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Include upper 5 address bits of physical address in iitlbp
- Prevent booting 64-bit kernels on PA1.x machines
- parport-gsc: mark init function static
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Merge tag 'parisc-for-6.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc architecture fixes from Helge Deller:
- Include the upper 5 address bits when inserting TLB entries on a
64-bit kernel.
On physical machines those are ignored, but in qemu it's nice to have
them included and to be correct.
- Stop the 64-bit kernel and show a warning if someone tries to boot on
a machine with a 32-bit CPU
- Fix a "no previous prototype" warning in parport-gsc
* tag 'parisc-for-6.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Prevent booting 64-bit kernels on PA1.x machines
parport: gsc: mark init function static
parisc/pgtable: Do not drop upper 5 address bits of physical address
1, Support PREEMPT_DYNAMIC with static keys;
2, Relax memory ordering for atomic operations;
3, Support BPF CPU v4 instructions for LoongArch;
4, Some build and runtime warning fixes.
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Merge tag 'loongarch-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- support PREEMPT_DYNAMIC with static keys
- relax memory ordering for atomic operations
- support BPF CPU v4 instructions for LoongArch
- some build and runtime warning fixes
* tag 'loongarch-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
selftests/bpf: Enable cpu v4 tests for LoongArch
LoongArch: BPF: Support signed mod instructions
LoongArch: BPF: Support signed div instructions
LoongArch: BPF: Support 32-bit offset jmp instructions
LoongArch: BPF: Support unconditional bswap instructions
LoongArch: BPF: Support sign-extension mov instructions
LoongArch: BPF: Support sign-extension load instructions
LoongArch: Add more instruction opcodes and emit_* helpers
LoongArch/smp: Call rcutree_report_cpu_starting() earlier
LoongArch: Relax memory ordering for atomic operations
LoongArch: Mark __percpu functions as always inline
LoongArch: Disable module from accessing external data directly
LoongArch: Support PREEMPT_DYNAMIC with static keys
- Finish a refactor of pgprot_framebuffer() which dependend on some changes
that were merged via the drm tree.
- Fix some kernel-doc warnings to quieten the bots.
Thanks to: Nathan Lynch, Thomas Zimmermann.
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Merge tag 'powerpc-6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Finish a refactor of pgprot_framebuffer() which dependend
on some changes that were merged via the drm tree
- Fix some kernel-doc warnings to quieten the bots
Thanks to Nathan Lynch and Thomas Zimmermann.
* tag 'powerpc-6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/rtas: Fix ppc_rtas_rmo_buf_show() kernel-doc
powerpc/pseries/rtas-work-area: Fix rtas_work_area_reserve_arena() kernel-doc
powerpc/fb: Call internal __phys_mem_access_prot() in fbdev code
powerpc: Remove file parameter from phys_mem_access_prot()
powerpc/machdep: Remove trailing whitespaces
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Merge tag '6.7-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- ctime caching fix (for setxattr)
- encryption fix
- DNS resolver mount fix
- debugging improvements
- multichannel fixes including cases where server stops or starts
supporting multichannel after mount
- reconnect fix
- minor cleanups
* tag '6.7-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal module version number for cifs.ko
cifs: handle when server stops supporting multichannel
cifs: handle when server starts supporting multichannel
Missing field not being returned in ioctl CIFS_IOC_GET_MNT_INFO
smb3: allow dumping session and tcon id to improve stats analysis and debugging
smb: client: fix mount when dns_resolver key is not available
smb3: fix caching of ctime on setxattr
smb3: minor cleanup of session handling code
cifs: reconnect work should have reference on server struct
cifs: do not pass cifs_sb when trying to add channels
cifs: account for primary channel in the interface list
cifs: distribute channels across interfaces based on speed
cifs: handle cases where a channel is closed
smb3: more minor cleanups for session handling routines
smb3: minor RDMA cleanup
cifs: Fix encryption of cleared, but unset rq_iter data buffers
- Documentation update: Add a note about argument and return value
fetching is the best effort because it depends on the type.
- objpool: Fix to make internal global variables static in
test_objpool.c.
- kprobes: Unify kprobes_exceptions_nofify() prototypes. There are
the same prototypes in asm/kprobes.h for some architectures, but
some of them are missing the prototype and it causes a warning.
So move the prototype into linux/kprobes.h.
- tracing: Fix to check the tracepoint event and return event at
parsing stage. The tracepoint event doesn't support %return
but if $retval exists, it will be converted to %return silently.
This finds that case and rejects it.
- tracing: Fix the order of the descriptions about the parameters
of __kprobe_event_gen_cmd_start() to be consistent with the
argument list of the function.
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Merge tag 'probes-fixes-v6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fixes from Masami Hiramatsu:
- Documentation update: Add a note about argument and return value
fetching is the best effort because it depends on the type.
- objpool: Fix to make internal global variables static in
test_objpool.c.
- kprobes: Unify kprobes_exceptions_nofify() prototypes. There are the
same prototypes in asm/kprobes.h for some architectures, but some of
them are missing the prototype and it causes a warning. So move the
prototype into linux/kprobes.h.
- tracing: Fix to check the tracepoint event and return event at
parsing stage. The tracepoint event doesn't support %return but if
$retval exists, it will be converted to %return silently. This finds
that case and rejects it.
- tracing: Fix the order of the descriptions about the parameters of
__kprobe_event_gen_cmd_start() to be consistent with the argument
list of the function.
* tag 'probes-fixes-v6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing/kprobes: Fix the order of argument descriptions
tracing: fprobe-event: Fix to check tracepoint event and return
kprobes: unify kprobes_exceptions_nofify() prototypes
lib: test_objpool: make global variables static
Documentation: tracing: Add a note about argument and retval access
- fix double free and resource leaks in imsttfb
- lots of remove callback cleanups and section mismatch fixes in omapfb,
amifb and atmel_lcdfb
- error code fix and memparse simplification in omapfb
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Merge tag 'fbdev-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev fixes and cleanups from Helge Deller:
- fix double free and resource leaks in imsttfb
- lots of remove callback cleanups and section mismatch fixes in
omapfb, amifb and atmel_lcdfb
- error code fix and memparse simplification in omapfb
* tag 'fbdev-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (31 commits)
fbdev: fsl-diu-fb: mark wr_reg_wa() static
fbdev: amifb: Convert to platform remove callback returning void
fbdev: amifb: Mark driver struct with __refdata to prevent section mismatch warning
fbdev: hyperv_fb: fix uninitialized local variable use
fbdev: omapfb/tpd12s015: Convert to platform remove callback returning void
fbdev: omapfb/tfp410: Convert to platform remove callback returning void
fbdev: omapfb/sharp-ls037v7dw01: Convert to platform remove callback returning void
fbdev: omapfb/opa362: Convert to platform remove callback returning void
fbdev: omapfb/hdmi: Convert to platform remove callback returning void
fbdev: omapfb/dvi: Convert to platform remove callback returning void
fbdev: omapfb/dsi-cm: Convert to platform remove callback returning void
fbdev: omapfb/dpi: Convert to platform remove callback returning void
fbdev: omapfb/analog-tv: Convert to platform remove callback returning void
fbdev: atmel_lcdfb: Convert to platform remove callback returning void
fbdev: omapfb/tpd12s015: Don't put .remove() in .exit.text and drop suppress_bind_attrs
fbdev: omapfb/tfp410: Don't put .remove() in .exit.text and drop suppress_bind_attrs
fbdev: omapfb/sharp-ls037v7dw01: Don't put .remove() in .exit.text and drop suppress_bind_attrs
fbdev: omapfb/opa362: Don't put .remove() in .exit.text and drop suppress_bind_attrs
fbdev: omapfb/hdmi: Don't put .remove() in .exit.text and drop suppress_bind_attrs
fbdev: omapfb/dvi: Don't put .remove() in .exit.text and drop suppress_bind_attrs
...
The order of descriptions should be consistent with the argument list of
the function, so "kretprobe" should be the second one.
int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, bool kretprobe,
const char *name, const char *loc, ...)
Link: https://lore.kernel.org/all/20231031041305.3363712-1-yujie.liu@intel.com/
Fixes: 2a588dd1d5d6 ("tracing: Add kprobe event command generation functions")
Suggested-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Yujie Liu <yujie.liu@intel.com>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
- big pile of amd fixes, but mostly hw support newly added in 6.7
- i915 fixes, mostly minor things
- qxl memory leak fix
- vc4 uaf fix in mock helpers
- syncobj fix for DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE
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Merge tag 'drm-next-2023-11-10' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Daniel Vetter:
"Dave's VPN to the big machine died, so it's on me to do fixes pr this
and next week while everyone else is at plumbers.
- big pile of amd fixes, but mostly for hw support newly added in 6.7
- i915 fixes, mostly minor things
- qxl memory leak fix
- vc4 uaf fix in mock helpers
- syncobj fix for DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE"
* tag 'drm-next-2023-11-10' of git://anongit.freedesktop.org/drm/drm: (78 commits)
drm/amdgpu: fix error handling in amdgpu_vm_init
drm/amdgpu: Fix possible null pointer dereference
drm/amdgpu: move UVD and VCE sched entity init after sched init
drm/amdgpu: move kfd_resume before the ip late init
drm/amd: Explicitly check for GFXOFF to be enabled for s0ix
drm/amdgpu: Change WREG32_RLC to WREG32_SOC15_RLC where inst != 0 (v2)
drm/amdgpu: Use correct KIQ MEC engine for gfx9.4.3 (v5)
drm/amdgpu: add smu v13.0.6 pcs xgmi ras error query support
drm/amdgpu: fix software pci_unplug on some chips
drm/amd/display: remove duplicated argument
drm/amdgpu: correct mca debugfs dump reg list
drm/amdgpu: correct acclerator check architecutre dump
drm/amdgpu: add pcs xgmi v6.4.0 ras support
drm/amdgpu: Change extended-scope MTYPE on GC 9.4.3
drm/amdgpu: disable smu v13.0.6 mca debug mode by default
drm/amdgpu: Support multiple error query modes
drm/amdgpu: refine smu v13.0.6 mca dump driver
drm/amdgpu: Do not program PF-only regs in hdp_v4_0.c under SRIOV (v2)
drm/amdgpu: Skip PCTL0_MMHUB_DEEPSLEEP_IB write in jpegv4.0.3 under SRIOV
drm: amd: Resolve Sphinx unexpected indentation warning
...
- Move the MediaTek GIC quirk handling from irqchip to core. Before the
merging window commit 44bd78dd2b88 ("irqchip/gic-v3: Disable pseudo
NMIs on MediaTek devices w/ firmware issues") temporarily addressed
this issue. Fixed now at a deeper level in the arch code.
- Reject events meant for other PMUs in the CoreSight PMU driver,
otherwise some of the core PMU events would disappear.
- Fix the Armv8 PMUv3 driver driver to not truncate 64-bit registers,
causing some events to be invisible.
- Remove duplicate declaration of __arm64_sys##name following the patch
to avoid prototype warning for syscalls.
- Typos in the elf_hwcap documentation.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
"Mostly PMU fixes and a reworking of the pseudo-NMI disabling on broken
MediaTek firmware:
- Move the MediaTek GIC quirk handling from irqchip to core. Before
the merging window commit 44bd78dd2b88 ("irqchip/gic-v3: Disable
pseudo NMIs on MediaTek devices w/ firmware issues") temporarily
addressed this issue. Fixed now at a deeper level in the arch code
- Reject events meant for other PMUs in the CoreSight PMU driver,
otherwise some of the core PMU events would disappear
- Fix the Armv8 PMUv3 driver driver to not truncate 64-bit registers,
causing some events to be invisible
- Remove duplicate declaration of __arm64_sys##name following the
patch to avoid prototype warning for syscalls
- Typos in the elf_hwcap documentation"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64/syscall: Remove duplicate declaration
Revert "arm64: smp: avoid NMI IPIs with broken MediaTek FW"
arm64: Move MediaTek GIC quirk handling from irqchip to core
arm64/arm: arm_pmuv3: perf: Don't truncate 64-bit registers
perf: arm_cspmu: Reject events meant for other PMUs
Documentation/arm64: Fix typos in elf_hwcaps
A collection of fixes for RC1. Majority of changes are various
ASoC driver-specific small fixes and usual HD-audio quirks, while
there are a couple of core changes: a fix in ALSA core procfs code
to avoid deadlocks at disconnection and an ASoC core fix for DAPM
clock widgets.
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Merge tag 'sound-fix-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of fixes for rc1.
The majority of changes are various ASoC driver-specific small fixes
and usual HD-audio quirks, while there are a couple of core changes: a
fix in ALSA core procfs code to avoid deadlocks at disconnection and
an ASoC core fix for DAPM clock widgets"
* tag 'sound-fix-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
OSS: dmasound/paula: Convert to platform remove callback returning void
ALSA: hda: ASUS UM5302LA: Added quirks for cs35L41/10431A83 on i2c bus
ALSA: info: Fix potential deadlock at disconnection
ASoC: nau8540: Add self recovery to improve capture quility
ALSA: hda/realtek: Add support dual speaker for Dell
ALSA: hda: Add ASRock X670E Taichi to denylist
ALSA: hda/realtek: Add quirk for ASUS UX7602ZM
ASoC: SOF: sof-client: trivial: fix comment typo
ASoC: dapm: fix clock get name
ASoC: hdmi-codec: register hpd callback on component probe
ASoC: mediatek: mt8186_mt6366_rt1019_rt5682s: trivial: fix error messages
ASoC: da7219: Improve system suspend and resume handling
ASoC: codecs: Modify macro value error
ASoC: codecs: Modify the wrong judgment of re value
ASoC: codecs: Modify the maximum value of calib
ASoC: amd: acp: fix for i2s mode register field update
ASoC: codecs: aw88399: Fix -Wuninitialized in aw_dev_set_vcalb()
ASoC: rt712-sdca: fix speaker route missing issue
ASoC: rockchip: Fix unused rockchip_i2s_tdm_match warning for !CONFIG_OF
ASoC: ti: omap-mcbsp: Fix runtime PM underflow warnings
A couple of fixes that came in during the merge window, one Kconfig
dependency fix and another fix for a long standing issue where in the
case where a sync transfer races with system suspend.
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Merge tag 'spi-fix-v6.7-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A couple of fixes that came in during the merge window: one Kconfig
dependency fix and another fix for a long standing issue where a sync
transfer races with system suspend"
* tag 'spi-fix-v6.7-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: Fix null dereference on suspend
spi: spi-zynq-qspi: add spi-mem to driver kconfig dependencies
- Fix broken cache-flush support for Micron eMMCs
- Revert "mmc: core: Capture correct oemid-bits for eMMC cards"
MMC host:
- sdhci_am654: Fix TAP value parsing for legacy speed mode
- sdhci-pci-gli: Fix support for ASPM mode for GL9755/GL9750
- vub300: Fix an error path in probe
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Merge tag 'mmc-v6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC core:
- Fix broken cache-flush support for Micron eMMCs
- Revert 'mmc: core: Capture correct oemid-bits for eMMC cards'
MMC host:
- sdhci_am654: Fix TAP value parsing for legacy speed mode
- sdhci-pci-gli: Fix support for ASPM mode for GL9755/GL9750
- vub300: Fix an error path in probe"
* tag 'mmc-v6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-pci-gli: GL9750: Mask the replay timer timeout of AER
mmc: sdhci-pci-gli: GL9755: Mask the replay timer timeout of AER
Revert "mmc: core: Capture correct oemid-bits for eMMC cards"
mmc: vub300: fix an error code
mmc: Add quirk MMC_QUIRK_BROKEN_CACHE_FLUSH for Micron eMMC Q2J54A
mmc: sdhci_am654: fix start loop index for TAP value parsing
