diff mbox series

[V3,4/4] coresight: trbe: Enable ACPI based TRBE devices

Message ID 20230803055652.1322801-5-anshuman.khandual@arm.com
State New
Headers
Series coresight: trbe: Enable ACPI based devices |

Commit Message

Anshuman Khandual Aug. 3, 2023, 5:56 a.m. UTC 
  This detects and enables ACPI based TRBE devices via the dummy platform
device created earlier for this purpose.

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>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 9 +++++++++
 drivers/hwtracing/coresight/coresight-trbe.h | 1 +
 2 files changed, 10 insertions(+)

Comments

Anshuman Khandual Aug. 7, 2023, 4:43 a.m. UTC | #1 
On 8/3/23 11:26, Anshuman Khandual wrote:
> This detects and enables ACPI based TRBE devices via the dummy platform
> device created earlier for this purpose.
> 
> 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>
> ---
>  drivers/hwtracing/coresight/coresight-trbe.c | 9 +++++++++
>  drivers/hwtracing/coresight/coresight-trbe.h | 1 +
>  2 files changed, 10 insertions(+)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
> index e1d9d06e7725..f884883e9018 100644
> --- a/drivers/hwtracing/coresight/coresight-trbe.c
> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
> @@ -1537,7 +1537,16 @@ static const struct of_device_id arm_trbe_of_match[] = {
>  };
>  MODULE_DEVICE_TABLE(of, arm_trbe_of_match);
>  
> +#ifdef CONFIG_ACPI
> +static const struct platform_device_id arm_trbe_acpi_match[] = {
> +	{ ARMV8_TRBE_PDEV_NAME, 0 },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
> +#endif
> +
>  static struct platform_driver arm_trbe_driver = {
> +	.id_table = arm_trbe_acpi_match,

The build problem [1] reported on the first version of the series still exists
here i.e arm_trbe_acpi_match is hidden without CONFIG_ACPI. I had assumed that
CONFIG_CORESIGHT always enables CONFIG_ACPI, which is not the case. Following
random config (with CONFIG_ACPI=n and CONFIG_CORESIGHT_TRBE=y) easily triggers
the build problem.

https://download.01.org/0day-ci/archive/20230805/202308052123.uqR35d19-lkp@intel.com/config

 make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -s -j 128
drivers/hwtracing/coresight/coresight-trbe.c:1563:23: error: implicit declaration of function ‘ACPI_PTR’ [-Werror=implicit-function-declaration]
 1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
      |                       ^~~~~~~~
drivers/hwtracing/coresight/coresight-trbe.c:1563:32: error: ‘arm_trbe_acpi_match’ undeclared here (not in a function); did you mean ‘arm_trbe_of_match’?
 1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
      |                                ^~~~~~~~~~~~~~~~~~~
      |                                arm_trbe_of_match

Following config wrap around fixes the problem.

--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1557,7 +1557,9 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
 #endif
 
 static struct platform_driver arm_trbe_driver = {
+#ifdef CONFIG_ACPI
        .id_table = arm_trbe_acpi_match,
+#endif
        .driver = {
                .name = DRVNAME,
                .of_match_table = of_match_ptr(arm_trbe_of_match),

Please not that unlike other coresight drivers, TRBE is not using 'acpi_device_id'
based "acpi_match_table = ACPI_PTR" construct. But regardless, ACPI_PTR() seems to
be an alternate (probably better) solution as well.

--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1557,7 +1557,7 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
 #endif
 
 static struct platform_driver arm_trbe_driver = {
-       .id_table = arm_trbe_acpi_match,
+       .id_table = ACPI_PTR(arm_trbe_acpi_match),
        .driver = {
                .name = DRVNAME,
                .of_match_table = of_match_ptr(arm_trbe_of_match),
diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h
index 94e67009848a..fce1735d5c58 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.h
+++ b/drivers/hwtracing/coresight/coresight-trbe.h
@@ -7,6 +7,7 @@
  *
  * Author: Anshuman Khandual <anshuman.khandual@arm.com>
  */
+#include <linux/acpi.h>
 #include <linux/coresight.h>
 #include <linux/device.h>
 #include <linux/irq.h>

[1] https://lore.kernel.org/all/202308052123.uqR35d19-lkp@intel.com/

>  	.driver	= {
>  		.name = DRVNAME,
>  		.of_match_table = of_match_ptr(arm_trbe_of_match),
> diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h
> index 77cbb5c63878..94e67009848a 100644
> --- a/drivers/hwtracing/coresight/coresight-trbe.h
> +++ b/drivers/hwtracing/coresight/coresight-trbe.h
> @@ -12,6 +12,7 @@
>  #include <linux/irq.h>
>  #include <linux/kernel.h>
>  #include <linux/of.h>
> +#include <linux/perf/arm_pmu.h>
>  #include <linux/platform_device.h>
>  #include <linux/smp.h>
>
Suzuki K Poulose Aug. 7, 2023, 11:37 a.m. UTC | #2 
On 07/08/2023 05:43, Anshuman Khandual wrote:
> 
> 
> On 8/3/23 11:26, Anshuman Khandual wrote:
>> This detects and enables ACPI based TRBE devices via the dummy platform
>> device created earlier for this purpose.
>>
>> 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>
>> ---
>>   drivers/hwtracing/coresight/coresight-trbe.c | 9 +++++++++
>>   drivers/hwtracing/coresight/coresight-trbe.h | 1 +
>>   2 files changed, 10 insertions(+)
>>
>> diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
>> index e1d9d06e7725..f884883e9018 100644
>> --- a/drivers/hwtracing/coresight/coresight-trbe.c
>> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
>> @@ -1537,7 +1537,16 @@ static const struct of_device_id arm_trbe_of_match[] = {
>>   };
>>   MODULE_DEVICE_TABLE(of, arm_trbe_of_match);
>>   
>> +#ifdef CONFIG_ACPI
>> +static const struct platform_device_id arm_trbe_acpi_match[] = {
>> +	{ ARMV8_TRBE_PDEV_NAME, 0 },
>> +	{ }
>> +};
>> +MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>> +#endif
>> +
>>   static struct platform_driver arm_trbe_driver = {
>> +	.id_table = arm_trbe_acpi_match,
> 
> The build problem [1] reported on the first version of the series still exists
> here i.e arm_trbe_acpi_match is hidden without CONFIG_ACPI. I had assumed that
> CONFIG_CORESIGHT always enables CONFIG_ACPI, which is not the case. Following
> random config (with CONFIG_ACPI=n and CONFIG_CORESIGHT_TRBE=y) easily triggers
> the build problem.
> 
> https://download.01.org/0day-ci/archive/20230805/202308052123.uqR35d19-lkp@intel.com/config
> 
>   make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -s -j 128
> drivers/hwtracing/coresight/coresight-trbe.c:1563:23: error: implicit declaration of function ‘ACPI_PTR’ [-Werror=implicit-function-declaration]
>   1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
>        |                       ^~~~~~~~
> drivers/hwtracing/coresight/coresight-trbe.c:1563:32: error: ‘arm_trbe_acpi_match’ undeclared here (not in a function); did you mean ‘arm_trbe_of_match’?
>   1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
>        |                                ^~~~~~~~~~~~~~~~~~~
>        |                                arm_trbe_of_match
> 
> Following config wrap around fixes the problem.
> 
> --- a/drivers/hwtracing/coresight/coresight-trbe.c
> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
> @@ -1557,7 +1557,9 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>   #endif
>   
>   static struct platform_driver arm_trbe_driver = {
> +#ifdef CONFIG_ACPI
>          .id_table = arm_trbe_acpi_match,
> +#endif
>          .driver = {
>                  .name = DRVNAME,
>                  .of_match_table = of_match_ptr(arm_trbe_of_match),
> 
> Please not that unlike other coresight drivers, TRBE is not using 'acpi_device_id'
> based "acpi_match_table = ACPI_PTR" construct. But regardless, ACPI_PTR() seems to
> be an alternate (probably better) solution as well.
> 
> --- a/drivers/hwtracing/coresight/coresight-trbe.c
> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
> @@ -1557,7 +1557,7 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>   #endif
>   
>   static struct platform_driver arm_trbe_driver = {
> -       .id_table = arm_trbe_acpi_match,
> +       .id_table = ACPI_PTR(arm_trbe_acpi_match),

This is preferred.

>          .driver = {
>                  .name = DRVNAME,
>                  .of_match_table = of_match_ptr(arm_trbe_of_match),
> diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h
> index 94e67009848a..fce1735d5c58 100644
> --- a/drivers/hwtracing/coresight/coresight-trbe.h
> +++ b/drivers/hwtracing/coresight/coresight-trbe.h
> @@ -7,6 +7,7 @@
>    *
>    * Author: Anshuman Khandual <anshuman.khandual@arm.com>
>    */
> +#include <linux/acpi.h>

Shouldn't this be added in trbe.c ? Does trbe.h depend on any ACPI headers ?

Suzuki
Anshuman Khandual Aug. 7, 2023, 11:58 a.m. UTC | #3 
On 8/7/23 17:07, Suzuki K Poulose wrote:
> On 07/08/2023 05:43, Anshuman Khandual wrote:
>>
>>
>> On 8/3/23 11:26, Anshuman Khandual wrote:
>>> This detects and enables ACPI based TRBE devices via the dummy platform
>>> device created earlier for this purpose.
>>>
>>> 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>
>>> ---
>>>   drivers/hwtracing/coresight/coresight-trbe.c | 9 +++++++++
>>>   drivers/hwtracing/coresight/coresight-trbe.h | 1 +
>>>   2 files changed, 10 insertions(+)
>>>
>>> diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
>>> index e1d9d06e7725..f884883e9018 100644
>>> --- a/drivers/hwtracing/coresight/coresight-trbe.c
>>> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
>>> @@ -1537,7 +1537,16 @@ static const struct of_device_id arm_trbe_of_match[] = {
>>>   };
>>>   MODULE_DEVICE_TABLE(of, arm_trbe_of_match);
>>>   +#ifdef CONFIG_ACPI
>>> +static const struct platform_device_id arm_trbe_acpi_match[] = {
>>> +    { ARMV8_TRBE_PDEV_NAME, 0 },
>>> +    { }
>>> +};
>>> +MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>>> +#endif
>>> +
>>>   static struct platform_driver arm_trbe_driver = {
>>> +    .id_table = arm_trbe_acpi_match,
>>
>> The build problem [1] reported on the first version of the series still exists
>> here i.e arm_trbe_acpi_match is hidden without CONFIG_ACPI. I had assumed that
>> CONFIG_CORESIGHT always enables CONFIG_ACPI, which is not the case. Following
>> random config (with CONFIG_ACPI=n and CONFIG_CORESIGHT_TRBE=y) easily triggers
>> the build problem.
>>
>> https://download.01.org/0day-ci/archive/20230805/202308052123.uqR35d19-lkp@intel.com/config
>>
>>   make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -s -j 128
>> drivers/hwtracing/coresight/coresight-trbe.c:1563:23: error: implicit declaration of function ‘ACPI_PTR’ [-Werror=implicit-function-declaration]
>>   1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
>>        |                       ^~~~~~~~
>> drivers/hwtracing/coresight/coresight-trbe.c:1563:32: error: ‘arm_trbe_acpi_match’ undeclared here (not in a function); did you mean ‘arm_trbe_of_match’?
>>   1563 |   .acpi_match_table = ACPI_PTR(arm_trbe_acpi_match),
>>        |                                ^~~~~~~~~~~~~~~~~~~
>>        |                                arm_trbe_of_match
>>
>> Following config wrap around fixes the problem.
>>
>> --- a/drivers/hwtracing/coresight/coresight-trbe.c
>> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
>> @@ -1557,7 +1557,9 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>>   #endif
>>     static struct platform_driver arm_trbe_driver = {
>> +#ifdef CONFIG_ACPI
>>          .id_table = arm_trbe_acpi_match,
>> +#endif
>>          .driver = {
>>                  .name = DRVNAME,
>>                  .of_match_table = of_match_ptr(arm_trbe_of_match),
>>
>> Please not that unlike other coresight drivers, TRBE is not using 'acpi_device_id'
>> based "acpi_match_table = ACPI_PTR" construct. But regardless, ACPI_PTR() seems to
>> be an alternate (probably better) solution as well.
>>
>> --- a/drivers/hwtracing/coresight/coresight-trbe.c
>> +++ b/drivers/hwtracing/coresight/coresight-trbe.c
>> @@ -1557,7 +1557,7 @@ MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
>>   #endif
>>     static struct platform_driver arm_trbe_driver = {
>> -       .id_table = arm_trbe_acpi_match,
>> +       .id_table = ACPI_PTR(arm_trbe_acpi_match),
> 
> This is preferred.
> 
>>          .driver = {
>>                  .name = DRVNAME,
>>                  .of_match_table = of_match_ptr(arm_trbe_of_match),
>> diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h
>> index 94e67009848a..fce1735d5c58 100644
>> --- a/drivers/hwtracing/coresight/coresight-trbe.h
>> +++ b/drivers/hwtracing/coresight/coresight-trbe.h
>> @@ -7,6 +7,7 @@
>>    *
>>    * Author: Anshuman Khandual <anshuman.khandual@arm.com>
>>    */
>> +#include <linux/acpi.h>
> 
> Shouldn't this be added in trbe.c ? Does trbe.h depend on any ACPI headers ?

The convention we have followed till now is all include/linux/ headers required
in TRBE driver is included via trbe.h not directly in trbe.c, just followed the
same principle this time around for acpi.h and perf/arm_pmu.h as well.
kernel test robot Aug. 13, 2023, 9:43 p.m. UTC | #4 
Hi Anshuman,

kernel test robot noticed the following build errors:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on arm/for-next soc/for-next linus/master arm/fixes v6.5-rc5 next-20230809]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Anshuman-Khandual/arm_pmu-acpi-Refactor-arm_spe_acpi_register_device/20230803-135907
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20230803055652.1322801-5-anshuman.khandual%40arm.com
patch subject: [PATCH V3 4/4] coresight: trbe: Enable ACPI based TRBE devices
config: arm64-randconfig-r071-20230813 (https://download.01.org/0day-ci/archive/20230814/202308140529.wEpy3fPK-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230814/202308140529.wEpy3fPK-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308140529.wEpy3fPK-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/hwtracing/coresight/coresight-trbe.c:1549:21: error: 'arm_trbe_acpi_match' undeclared here (not in a function); did you mean 'arm_trbe_of_match'?
    1549 |         .id_table = arm_trbe_acpi_match,
         |                     ^~~~~~~~~~~~~~~~~~~
         |                     arm_trbe_of_match


vim +1549 drivers/hwtracing/coresight/coresight-trbe.c

  1547	
  1548	static struct platform_driver arm_trbe_driver = {
> 1549		.id_table = arm_trbe_acpi_match,
  1550		.driver	= {
  1551			.name = DRVNAME,
  1552			.of_match_table = of_match_ptr(arm_trbe_of_match),
  1553			.suppress_bind_attrs = true,
  1554		},
  1555		.probe	= arm_trbe_device_probe,
  1556		.remove	= arm_trbe_device_remove,
  1557	};
  1558
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index e1d9d06e7725..f884883e9018 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1537,7 +1537,16 @@  static const struct of_device_id arm_trbe_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, arm_trbe_of_match);
 
+#ifdef CONFIG_ACPI
+static const struct platform_device_id arm_trbe_acpi_match[] = {
+	{ ARMV8_TRBE_PDEV_NAME, 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, arm_trbe_acpi_match);
+#endif
+
 static struct platform_driver arm_trbe_driver = {
+	.id_table = arm_trbe_acpi_match,
 	.driver	= {
 		.name = DRVNAME,
 		.of_match_table = of_match_ptr(arm_trbe_of_match),
diff --git a/drivers/hwtracing/coresight/coresight-trbe.h b/drivers/hwtracing/coresight/coresight-trbe.h
index 77cbb5c63878..94e67009848a 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.h
+++ b/drivers/hwtracing/coresight/coresight-trbe.h
@@ -12,6 +12,7 @@ 
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
+#include <linux/perf/arm_pmu.h>
 #include <linux/platform_device.h>
 #include <linux/smp.h>