* [PATCH 0/3] coresight: Patches for v5.11 (part 2)
@ 2020-12-08 18:26 ` Mathieu Poirier
0 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-kernel, linux-arm-kernel
Good morning,
As expected a few more fixes came late in the cycle - please
see if you can include them in the v5.11 cycle.
Applies cleanly on today's char-misc-next (ee64ed8153ab).
Thanks,
Mathieu
Arnd Bergmann (1):
coresight: remove broken __exit annotations
Qi Liu (1):
coresight: etm4x: Modify core-commit to avoid HiSilicon ETM overflow
Suzuki K Poulose (1):
coresight: tmc-etr: Fix barrier packet insertion for perf buffer
drivers/hwtracing/coresight/Kconfig | 8 ++
drivers/hwtracing/coresight/coresight-catu.c | 2 +-
.../hwtracing/coresight/coresight-cti-core.c | 2 +-
drivers/hwtracing/coresight/coresight-etb10.c | 2 +-
.../coresight/coresight-etm3x-core.c | 4 +-
.../coresight/coresight-etm4x-core.c | 102 +++++++++++++++++-
drivers/hwtracing/coresight/coresight-etm4x.h | 8 ++
.../hwtracing/coresight/coresight-funnel.c | 6 +-
.../coresight/coresight-replicator.c | 6 +-
drivers/hwtracing/coresight/coresight-stm.c | 2 +-
.../hwtracing/coresight/coresight-tmc-core.c | 2 +-
.../hwtracing/coresight/coresight-tmc-etr.c | 2 +-
drivers/hwtracing/coresight/coresight-tpiu.c | 2 +-
13 files changed, 131 insertions(+), 17 deletions(-)
--
2.25.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 1/3] coresight: tmc-etr: Fix barrier packet insertion for perf buffer
2020-12-08 18:26 ` Mathieu Poirier
@ 2020-12-08 18:26 ` Mathieu Poirier
-1 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-arm-kernel, linux-kernel
From: Suzuki K Poulose <suzuki.poulose@arm.com>
When the ETR is used in perf mode with a larger buffer (configured
via sysfs or the default size of 1M) than the perf aux buffer size,
we end up inserting the barrier packet at the wrong offset, while
moving the offset forward. i.e, instead of the "new moved offset",
we insert it at the current hardware buffer offset. These packets
will not be visible as they are never copied and could lead to
corruption in the trace decoding side, as the decoder is not aware
that it needs to reset the decoding.
Fixes: ec13c78d7b45 ("coresight: tmc-etr: Add barrier packets when moving offset forward")
Reported-by: Al Grant <al.grant@arm.com>
Tested-by: Mike Leach <mike.leach@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-tmc-etr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index a31a4d7ae25e..bf5230e39c5b 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1552,7 +1552,7 @@ tmc_update_etr_buffer(struct coresight_device *csdev,
/* Insert barrier packets at the beginning, if there was an overflow */
if (lost)
- tmc_etr_buf_insert_barrier_packet(etr_buf, etr_buf->offset);
+ tmc_etr_buf_insert_barrier_packet(etr_buf, offset);
tmc_etr_sync_perf_buffer(etr_perf, offset, size);
/*
--
2.25.1
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 1/3] coresight: tmc-etr: Fix barrier packet insertion for perf buffer
@ 2020-12-08 18:26 ` Mathieu Poirier
0 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-kernel, linux-arm-kernel
From: Suzuki K Poulose <suzuki.poulose@arm.com>
When the ETR is used in perf mode with a larger buffer (configured
via sysfs or the default size of 1M) than the perf aux buffer size,
we end up inserting the barrier packet at the wrong offset, while
moving the offset forward. i.e, instead of the "new moved offset",
we insert it at the current hardware buffer offset. These packets
will not be visible as they are never copied and could lead to
corruption in the trace decoding side, as the decoder is not aware
that it needs to reset the decoding.
Fixes: ec13c78d7b45 ("coresight: tmc-etr: Add barrier packets when moving offset forward")
Reported-by: Al Grant <al.grant@arm.com>
Tested-by: Mike Leach <mike.leach@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-tmc-etr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index a31a4d7ae25e..bf5230e39c5b 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1552,7 +1552,7 @@ tmc_update_etr_buffer(struct coresight_device *csdev,
/* Insert barrier packets at the beginning, if there was an overflow */
if (lost)
- tmc_etr_buf_insert_barrier_packet(etr_buf, etr_buf->offset);
+ tmc_etr_buf_insert_barrier_packet(etr_buf, offset);
tmc_etr_sync_perf_buffer(etr_perf, offset, size);
/*
--
2.25.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3] coresight: remove broken __exit annotations
2020-12-08 18:26 ` Mathieu Poirier
@ 2020-12-08 18:26 ` Mathieu Poirier
-1 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-arm-kernel, linux-kernel
From: Arnd Bergmann <arnd@arndb.de>
Functions that are annotated __exit are discarded for built-in drivers,
but the .remove callback in a device driver must still be kept around
to allow bind/unbind operations.
There is now a linker warning for the discarded symbol references:
`tmc_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tmc-core.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tmc-core.o
`tpiu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tpiu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tpiu.o
`etb_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-etb10.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-etb10.o
`static_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
`dynamic_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
`static_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
`dynamic_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
`catu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-catu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-catu.o
Remove all those annotations.
Fixes: 8b0cf82677d1 ("coresight: stm: Allow to build coresight-stm as a module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-catu.c | 2 +-
drivers/hwtracing/coresight/coresight-cti-core.c | 2 +-
drivers/hwtracing/coresight/coresight-etb10.c | 2 +-
drivers/hwtracing/coresight/coresight-etm3x-core.c | 4 ++--
drivers/hwtracing/coresight/coresight-etm4x-core.c | 4 ++--
drivers/hwtracing/coresight/coresight-funnel.c | 6 +++---
drivers/hwtracing/coresight/coresight-replicator.c | 6 +++---
drivers/hwtracing/coresight/coresight-stm.c | 2 +-
drivers/hwtracing/coresight/coresight-tmc-core.c | 2 +-
drivers/hwtracing/coresight/coresight-tpiu.c | 2 +-
10 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 99430f6cf5a5..a61313f320bd 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -567,7 +567,7 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit catu_remove(struct amba_device *adev)
+static int catu_remove(struct amba_device *adev)
{
struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c
index d28eae93e55c..61dbc1afd8da 100644
--- a/drivers/hwtracing/coresight/coresight-cti-core.c
+++ b/drivers/hwtracing/coresight/coresight-cti-core.c
@@ -836,7 +836,7 @@ static void cti_device_release(struct device *dev)
if (drvdata->csdev_release)
drvdata->csdev_release(dev);
}
-static int __exit cti_remove(struct amba_device *adev)
+static int cti_remove(struct amba_device *adev)
{
struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 1b320ab581ca..0cf6f0b947b6 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -803,7 +803,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit etb_remove(struct amba_device *adev)
+static int etb_remove(struct amba_device *adev)
{
struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
index 47f610b1c2b1..5bf5a5a4ce6d 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -902,14 +902,14 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
return 0;
}
-static void __exit clear_etmdrvdata(void *info)
+static void clear_etmdrvdata(void *info)
{
int cpu = *(int *)info;
etmdrvdata[cpu] = NULL;
}
-static int __exit etm_remove(struct amba_device *adev)
+static int etm_remove(struct amba_device *adev)
{
struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index d78a37b6592c..3ad5c2a01033 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1575,14 +1575,14 @@ static struct amba_cs_uci_id uci_id_etm4[] = {
}
};
-static void __exit clear_etmdrvdata(void *info)
+static void clear_etmdrvdata(void *info)
{
int cpu = *(int *)info;
etmdrvdata[cpu] = NULL;
}
-static int __exit etm4_remove(struct amba_device *adev)
+static int etm4_remove(struct amba_device *adev)
{
struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 39be46b74dfe..071c723227db 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -274,7 +274,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
return ret;
}
-static int __exit funnel_remove(struct device *dev)
+static int funnel_remove(struct device *dev)
{
struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
@@ -328,7 +328,7 @@ static int static_funnel_probe(struct platform_device *pdev)
return ret;
}
-static int __exit static_funnel_remove(struct platform_device *pdev)
+static int static_funnel_remove(struct platform_device *pdev)
{
funnel_remove(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -370,7 +370,7 @@ static int dynamic_funnel_probe(struct amba_device *adev,
return funnel_probe(&adev->dev, &adev->res);
}
-static int __exit dynamic_funnel_remove(struct amba_device *adev)
+static int dynamic_funnel_remove(struct amba_device *adev)
{
return funnel_remove(&adev->dev);
}
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 6772f23e5c4b..7e2a2b7f503f 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -291,7 +291,7 @@ static int replicator_probe(struct device *dev, struct resource *res)
return ret;
}
-static int __exit replicator_remove(struct device *dev)
+static int replicator_remove(struct device *dev)
{
struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
@@ -318,7 +318,7 @@ static int static_replicator_probe(struct platform_device *pdev)
return ret;
}
-static int __exit static_replicator_remove(struct platform_device *pdev)
+static int static_replicator_remove(struct platform_device *pdev)
{
replicator_remove(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -388,7 +388,7 @@ static int dynamic_replicator_probe(struct amba_device *adev,
return replicator_probe(&adev->dev, &adev->res);
}
-static int __exit dynamic_replicator_remove(struct amba_device *adev)
+static int dynamic_replicator_remove(struct amba_device *adev)
{
return replicator_remove(&adev->dev);
}
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 32d29704206b..99791773f682 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -951,7 +951,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit stm_remove(struct amba_device *adev)
+static int stm_remove(struct amba_device *adev)
{
struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
index 5653e0945c74..8169dff5a9f6 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -559,7 +559,7 @@ static void tmc_shutdown(struct amba_device *adev)
spin_unlock_irqrestore(&drvdata->spinlock, flags);
}
-static int __exit tmc_remove(struct amba_device *adev)
+static int tmc_remove(struct amba_device *adev)
{
struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 010762a46087..d5dfee9ee556 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -173,7 +173,7 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
return PTR_ERR(drvdata->csdev);
}
-static int __exit tpiu_remove(struct amba_device *adev)
+static int tpiu_remove(struct amba_device *adev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
--
2.25.1
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 2/3] coresight: remove broken __exit annotations
@ 2020-12-08 18:26 ` Mathieu Poirier
0 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-kernel, linux-arm-kernel
From: Arnd Bergmann <arnd@arndb.de>
Functions that are annotated __exit are discarded for built-in drivers,
but the .remove callback in a device driver must still be kept around
to allow bind/unbind operations.
There is now a linker warning for the discarded symbol references:
`tmc_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tmc-core.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tmc-core.o
`tpiu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-tpiu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-tpiu.o
`etb_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-etb10.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-etb10.o
`static_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
`dynamic_funnel_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-funnel.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-funnel.o
`static_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
`dynamic_replicator_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-replicator.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-replicator.o
`catu_remove' referenced in section `.data' of drivers/hwtracing/coresight/coresight-catu.o: defined in discarded section `.exit.text' of drivers/hwtracing/coresight/coresight-catu.o
Remove all those annotations.
Fixes: 8b0cf82677d1 ("coresight: stm: Allow to build coresight-stm as a module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-catu.c | 2 +-
drivers/hwtracing/coresight/coresight-cti-core.c | 2 +-
drivers/hwtracing/coresight/coresight-etb10.c | 2 +-
drivers/hwtracing/coresight/coresight-etm3x-core.c | 4 ++--
drivers/hwtracing/coresight/coresight-etm4x-core.c | 4 ++--
drivers/hwtracing/coresight/coresight-funnel.c | 6 +++---
drivers/hwtracing/coresight/coresight-replicator.c | 6 +++---
drivers/hwtracing/coresight/coresight-stm.c | 2 +-
drivers/hwtracing/coresight/coresight-tmc-core.c | 2 +-
drivers/hwtracing/coresight/coresight-tpiu.c | 2 +-
10 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 99430f6cf5a5..a61313f320bd 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -567,7 +567,7 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit catu_remove(struct amba_device *adev)
+static int catu_remove(struct amba_device *adev)
{
struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c
index d28eae93e55c..61dbc1afd8da 100644
--- a/drivers/hwtracing/coresight/coresight-cti-core.c
+++ b/drivers/hwtracing/coresight/coresight-cti-core.c
@@ -836,7 +836,7 @@ static void cti_device_release(struct device *dev)
if (drvdata->csdev_release)
drvdata->csdev_release(dev);
}
-static int __exit cti_remove(struct amba_device *adev)
+static int cti_remove(struct amba_device *adev)
{
struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 1b320ab581ca..0cf6f0b947b6 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -803,7 +803,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit etb_remove(struct amba_device *adev)
+static int etb_remove(struct amba_device *adev)
{
struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
index 47f610b1c2b1..5bf5a5a4ce6d 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -902,14 +902,14 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
return 0;
}
-static void __exit clear_etmdrvdata(void *info)
+static void clear_etmdrvdata(void *info)
{
int cpu = *(int *)info;
etmdrvdata[cpu] = NULL;
}
-static int __exit etm_remove(struct amba_device *adev)
+static int etm_remove(struct amba_device *adev)
{
struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index d78a37b6592c..3ad5c2a01033 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1575,14 +1575,14 @@ static struct amba_cs_uci_id uci_id_etm4[] = {
}
};
-static void __exit clear_etmdrvdata(void *info)
+static void clear_etmdrvdata(void *info)
{
int cpu = *(int *)info;
etmdrvdata[cpu] = NULL;
}
-static int __exit etm4_remove(struct amba_device *adev)
+static int etm4_remove(struct amba_device *adev)
{
struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 39be46b74dfe..071c723227db 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -274,7 +274,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
return ret;
}
-static int __exit funnel_remove(struct device *dev)
+static int funnel_remove(struct device *dev)
{
struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
@@ -328,7 +328,7 @@ static int static_funnel_probe(struct platform_device *pdev)
return ret;
}
-static int __exit static_funnel_remove(struct platform_device *pdev)
+static int static_funnel_remove(struct platform_device *pdev)
{
funnel_remove(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -370,7 +370,7 @@ static int dynamic_funnel_probe(struct amba_device *adev,
return funnel_probe(&adev->dev, &adev->res);
}
-static int __exit dynamic_funnel_remove(struct amba_device *adev)
+static int dynamic_funnel_remove(struct amba_device *adev)
{
return funnel_remove(&adev->dev);
}
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 6772f23e5c4b..7e2a2b7f503f 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -291,7 +291,7 @@ static int replicator_probe(struct device *dev, struct resource *res)
return ret;
}
-static int __exit replicator_remove(struct device *dev)
+static int replicator_remove(struct device *dev)
{
struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
@@ -318,7 +318,7 @@ static int static_replicator_probe(struct platform_device *pdev)
return ret;
}
-static int __exit static_replicator_remove(struct platform_device *pdev)
+static int static_replicator_remove(struct platform_device *pdev)
{
replicator_remove(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -388,7 +388,7 @@ static int dynamic_replicator_probe(struct amba_device *adev,
return replicator_probe(&adev->dev, &adev->res);
}
-static int __exit dynamic_replicator_remove(struct amba_device *adev)
+static int dynamic_replicator_remove(struct amba_device *adev)
{
return replicator_remove(&adev->dev);
}
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 32d29704206b..99791773f682 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -951,7 +951,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
-static int __exit stm_remove(struct amba_device *adev)
+static int stm_remove(struct amba_device *adev)
{
struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
index 5653e0945c74..8169dff5a9f6 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -559,7 +559,7 @@ static void tmc_shutdown(struct amba_device *adev)
spin_unlock_irqrestore(&drvdata->spinlock, flags);
}
-static int __exit tmc_remove(struct amba_device *adev)
+static int tmc_remove(struct amba_device *adev)
{
struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 010762a46087..d5dfee9ee556 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -173,7 +173,7 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
return PTR_ERR(drvdata->csdev);
}
-static int __exit tpiu_remove(struct amba_device *adev)
+static int tpiu_remove(struct amba_device *adev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
--
2.25.1
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 3/3] coresight: etm4x: Modify core-commit to avoid HiSilicon ETM overflow
2020-12-08 18:26 ` Mathieu Poirier
@ 2020-12-08 18:26 ` Mathieu Poirier
-1 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-arm-kernel, linux-kernel
From: Qi Liu <liuqi115@huawei.com>
The ETM device can't keep up with the core pipeline when cpu core
is at full speed. This may cause overflow within core and its ETM.
This is a common phenomenon on ETM devices.
On HiSilicon Hip08 platform, a specific feature is added to set
core pipeline. So commit rate can be reduced manually to avoid ETM
overflow.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Qi Liu <liuqi115@huawei.com>
[Modified changelog title and Kconfig description]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/Kconfig | 8 ++
.../coresight/coresight-etm4x-core.c | 98 +++++++++++++++++++
drivers/hwtracing/coresight/coresight-etm4x.h | 8 ++
3 files changed, 114 insertions(+)
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index c1198245461d..7b44ba22cbe1 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -110,6 +110,14 @@ config CORESIGHT_SOURCE_ETM4X
To compile this driver as a module, choose M here: the
module will be called coresight-etm4x.
+config ETM4X_IMPDEF_FEATURE
+ bool "Control implementation defined overflow support in ETM 4.x driver"
+ depends on CORESIGHT_SOURCE_ETM4X
+ help
+ This control provides implementation define control for CoreSight
+ ETM 4.x tracer module that can't reduce commit rate automatically.
+ This avoids overflow between the ETM tracer module and the cpu core.
+
config CORESIGHT_STM
tristate "CoreSight System Trace Macrocell driver"
depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 3ad5c2a01033..b20b6ff17cf6 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -3,6 +3,7 @@
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*/
+#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@@ -28,7 +29,9 @@
#include <linux/perf_event.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
+
#include <asm/sections.h>
+#include <asm/sysreg.h>
#include <asm/local.h>
#include <asm/virt.h>
@@ -103,6 +106,97 @@ struct etm4_enable_arg {
int rc;
};
+#ifdef CONFIG_ETM4X_IMPDEF_FEATURE
+
+#define HISI_HIP08_AMBA_ID 0x000b6d01
+#define ETM4_AMBA_MASK 0xfffff
+#define HISI_HIP08_CORE_COMMIT_MASK 0x3000
+#define HISI_HIP08_CORE_COMMIT_SHIFT 12
+#define HISI_HIP08_CORE_COMMIT_FULL 0b00
+#define HISI_HIP08_CORE_COMMIT_LVL_1 0b01
+#define HISI_HIP08_CORE_COMMIT_REG sys_reg(3, 1, 15, 2, 5)
+
+struct etm4_arch_features {
+ void (*arch_callback)(bool enable);
+};
+
+static bool etm4_hisi_match_pid(unsigned int id)
+{
+ return (id & ETM4_AMBA_MASK) == HISI_HIP08_AMBA_ID;
+}
+
+static void etm4_hisi_config_core_commit(bool enable)
+{
+ u8 commit = enable ? HISI_HIP08_CORE_COMMIT_LVL_1 :
+ HISI_HIP08_CORE_COMMIT_FULL;
+ u64 val;
+
+ /*
+ * bit 12 and 13 of HISI_HIP08_CORE_COMMIT_REG are used together
+ * to set core-commit, 2'b00 means cpu is at full speed, 2'b01,
+ * 2'b10, 2'b11 mean reduce pipeline speed, and 2'b01 means level-1
+ * speed(minimun value). So bit 12 and 13 should be cleared together.
+ */
+ val = read_sysreg_s(HISI_HIP08_CORE_COMMIT_REG);
+ val &= ~HISI_HIP08_CORE_COMMIT_MASK;
+ val |= commit << HISI_HIP08_CORE_COMMIT_SHIFT;
+ write_sysreg_s(val, HISI_HIP08_CORE_COMMIT_REG);
+}
+
+static struct etm4_arch_features etm4_features[] = {
+ [ETM4_IMPDEF_HISI_CORE_COMMIT] = {
+ .arch_callback = etm4_hisi_config_core_commit,
+ },
+ {},
+};
+
+static void etm4_enable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+ struct etm4_arch_features *ftr;
+ int bit;
+
+ for_each_set_bit(bit, drvdata->arch_features, ETM4_IMPDEF_FEATURE_MAX) {
+ ftr = &etm4_features[bit];
+
+ if (ftr->arch_callback)
+ ftr->arch_callback(true);
+ }
+}
+
+static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+ struct etm4_arch_features *ftr;
+ int bit;
+
+ for_each_set_bit(bit, drvdata->arch_features, ETM4_IMPDEF_FEATURE_MAX) {
+ ftr = &etm4_features[bit];
+
+ if (ftr->arch_callback)
+ ftr->arch_callback(false);
+ }
+}
+
+static void etm4_check_arch_features(struct etmv4_drvdata *drvdata,
+ unsigned int id)
+{
+ if (etm4_hisi_match_pid(id))
+ set_bit(ETM4_IMPDEF_HISI_CORE_COMMIT, drvdata->arch_features);
+}
+#else
+static void etm4_enable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+}
+
+static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+}
+
+static void etm4_check_arch_features(struct etmv4_drvdata *drvdata,
+ unsigned int id)
+{
+}
+#endif /* CONFIG_ETM4X_IMPDEF_FEATURE */
+
static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
{
int i, rc;
@@ -110,6 +204,7 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
struct device *etm_dev = &drvdata->csdev->dev;
CS_UNLOCK(drvdata->base);
+ etm4_enable_arch_specific(drvdata);
etm4_os_unlock(drvdata);
@@ -479,6 +574,7 @@ static void etm4_disable_hw(void *info)
int i;
CS_UNLOCK(drvdata->base);
+ etm4_disable_arch_specific(drvdata);
if (!drvdata->skip_power_up) {
/* power can be removed from the trace unit now */
@@ -1563,6 +1659,8 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->boot_enable = true;
}
+ etm4_check_arch_features(drvdata, id->id);
+
return 0;
}
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index eefc7371c6c4..3dd3e0633328 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -8,6 +8,7 @@
#include <asm/local.h>
#include <linux/spinlock.h>
+#include <linux/types.h>
#include "coresight-priv.h"
/*
@@ -203,6 +204,11 @@
/* Interpretation of resource numbers change at ETM v4.3 architecture */
#define ETM4X_ARCH_4V3 0x43
+enum etm_impdef_type {
+ ETM4_IMPDEF_HISI_CORE_COMMIT,
+ ETM4_IMPDEF_FEATURE_MAX,
+};
+
/**
* struct etmv4_config - configuration information related to an ETMv4
* @mode: Controls various modes supported by this ETM.
@@ -415,6 +421,7 @@ struct etmv4_save_state {
* @state_needs_restore: True when there is context to restore after PM exit
* @skip_power_up: Indicates if an implementation can skip powering up
* the trace unit.
+ * @arch_features: Bitmap of arch features of etmv4 devices.
*/
struct etmv4_drvdata {
void __iomem *base;
@@ -463,6 +470,7 @@ struct etmv4_drvdata {
struct etmv4_save_state *save_state;
bool state_needs_restore;
bool skip_power_up;
+ DECLARE_BITMAP(arch_features, ETM4_IMPDEF_FEATURE_MAX);
};
/* Address comparator access types */
--
2.25.1
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 3/3] coresight: etm4x: Modify core-commit to avoid HiSilicon ETM overflow
@ 2020-12-08 18:26 ` Mathieu Poirier
0 siblings, 0 replies; 8+ messages in thread
From: Mathieu Poirier @ 2020-12-08 18:26 UTC (permalink / raw)
To: gregkh; +Cc: linux-kernel, linux-arm-kernel
From: Qi Liu <liuqi115@huawei.com>
The ETM device can't keep up with the core pipeline when cpu core
is at full speed. This may cause overflow within core and its ETM.
This is a common phenomenon on ETM devices.
On HiSilicon Hip08 platform, a specific feature is added to set
core pipeline. So commit rate can be reduced manually to avoid ETM
overflow.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Qi Liu <liuqi115@huawei.com>
[Modified changelog title and Kconfig description]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/Kconfig | 8 ++
.../coresight/coresight-etm4x-core.c | 98 +++++++++++++++++++
drivers/hwtracing/coresight/coresight-etm4x.h | 8 ++
3 files changed, 114 insertions(+)
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index c1198245461d..7b44ba22cbe1 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -110,6 +110,14 @@ config CORESIGHT_SOURCE_ETM4X
To compile this driver as a module, choose M here: the
module will be called coresight-etm4x.
+config ETM4X_IMPDEF_FEATURE
+ bool "Control implementation defined overflow support in ETM 4.x driver"
+ depends on CORESIGHT_SOURCE_ETM4X
+ help
+ This control provides implementation define control for CoreSight
+ ETM 4.x tracer module that can't reduce commit rate automatically.
+ This avoids overflow between the ETM tracer module and the cpu core.
+
config CORESIGHT_STM
tristate "CoreSight System Trace Macrocell driver"
depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 3ad5c2a01033..b20b6ff17cf6 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -3,6 +3,7 @@
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*/
+#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@@ -28,7 +29,9 @@
#include <linux/perf_event.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
+
#include <asm/sections.h>
+#include <asm/sysreg.h>
#include <asm/local.h>
#include <asm/virt.h>
@@ -103,6 +106,97 @@ struct etm4_enable_arg {
int rc;
};
+#ifdef CONFIG_ETM4X_IMPDEF_FEATURE
+
+#define HISI_HIP08_AMBA_ID 0x000b6d01
+#define ETM4_AMBA_MASK 0xfffff
+#define HISI_HIP08_CORE_COMMIT_MASK 0x3000
+#define HISI_HIP08_CORE_COMMIT_SHIFT 12
+#define HISI_HIP08_CORE_COMMIT_FULL 0b00
+#define HISI_HIP08_CORE_COMMIT_LVL_1 0b01
+#define HISI_HIP08_CORE_COMMIT_REG sys_reg(3, 1, 15, 2, 5)
+
+struct etm4_arch_features {
+ void (*arch_callback)(bool enable);
+};
+
+static bool etm4_hisi_match_pid(unsigned int id)
+{
+ return (id & ETM4_AMBA_MASK) == HISI_HIP08_AMBA_ID;
+}
+
+static void etm4_hisi_config_core_commit(bool enable)
+{
+ u8 commit = enable ? HISI_HIP08_CORE_COMMIT_LVL_1 :
+ HISI_HIP08_CORE_COMMIT_FULL;
+ u64 val;
+
+ /*
+ * bit 12 and 13 of HISI_HIP08_CORE_COMMIT_REG are used together
+ * to set core-commit, 2'b00 means cpu is at full speed, 2'b01,
+ * 2'b10, 2'b11 mean reduce pipeline speed, and 2'b01 means level-1
+ * speed(minimun value). So bit 12 and 13 should be cleared together.
+ */
+ val = read_sysreg_s(HISI_HIP08_CORE_COMMIT_REG);
+ val &= ~HISI_HIP08_CORE_COMMIT_MASK;
+ val |= commit << HISI_HIP08_CORE_COMMIT_SHIFT;
+ write_sysreg_s(val, HISI_HIP08_CORE_COMMIT_REG);
+}
+
+static struct etm4_arch_features etm4_features[] = {
+ [ETM4_IMPDEF_HISI_CORE_COMMIT] = {
+ .arch_callback = etm4_hisi_config_core_commit,
+ },
+ {},
+};
+
+static void etm4_enable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+ struct etm4_arch_features *ftr;
+ int bit;
+
+ for_each_set_bit(bit, drvdata->arch_features, ETM4_IMPDEF_FEATURE_MAX) {
+ ftr = &etm4_features[bit];
+
+ if (ftr->arch_callback)
+ ftr->arch_callback(true);
+ }
+}
+
+static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+ struct etm4_arch_features *ftr;
+ int bit;
+
+ for_each_set_bit(bit, drvdata->arch_features, ETM4_IMPDEF_FEATURE_MAX) {
+ ftr = &etm4_features[bit];
+
+ if (ftr->arch_callback)
+ ftr->arch_callback(false);
+ }
+}
+
+static void etm4_check_arch_features(struct etmv4_drvdata *drvdata,
+ unsigned int id)
+{
+ if (etm4_hisi_match_pid(id))
+ set_bit(ETM4_IMPDEF_HISI_CORE_COMMIT, drvdata->arch_features);
+}
+#else
+static void etm4_enable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+}
+
+static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata)
+{
+}
+
+static void etm4_check_arch_features(struct etmv4_drvdata *drvdata,
+ unsigned int id)
+{
+}
+#endif /* CONFIG_ETM4X_IMPDEF_FEATURE */
+
static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
{
int i, rc;
@@ -110,6 +204,7 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata)
struct device *etm_dev = &drvdata->csdev->dev;
CS_UNLOCK(drvdata->base);
+ etm4_enable_arch_specific(drvdata);
etm4_os_unlock(drvdata);
@@ -479,6 +574,7 @@ static void etm4_disable_hw(void *info)
int i;
CS_UNLOCK(drvdata->base);
+ etm4_disable_arch_specific(drvdata);
if (!drvdata->skip_power_up) {
/* power can be removed from the trace unit now */
@@ -1563,6 +1659,8 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->boot_enable = true;
}
+ etm4_check_arch_features(drvdata, id->id);
+
return 0;
}
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index eefc7371c6c4..3dd3e0633328 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -8,6 +8,7 @@
#include <asm/local.h>
#include <linux/spinlock.h>
+#include <linux/types.h>
#include "coresight-priv.h"
/*
@@ -203,6 +204,11 @@
/* Interpretation of resource numbers change at ETM v4.3 architecture */
#define ETM4X_ARCH_4V3 0x43
+enum etm_impdef_type {
+ ETM4_IMPDEF_HISI_CORE_COMMIT,
+ ETM4_IMPDEF_FEATURE_MAX,
+};
+
/**
* struct etmv4_config - configuration information related to an ETMv4
* @mode: Controls various modes supported by this ETM.
@@ -415,6 +421,7 @@ struct etmv4_save_state {
* @state_needs_restore: True when there is context to restore after PM exit
* @skip_power_up: Indicates if an implementation can skip powering up
* the trace unit.
+ * @arch_features: Bitmap of arch features of etmv4 devices.
*/
struct etmv4_drvdata {
void __iomem *base;
@@ -463,6 +470,7 @@ struct etmv4_drvdata {
struct etmv4_save_state *save_state;
bool state_needs_restore;
bool skip_power_up;
+ DECLARE_BITMAP(arch_features, ETM4_IMPDEF_FEATURE_MAX);
};
/* Address comparator access types */
--
2.25.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread