mbox series

[v12,0/9] Coresight: Add support for TPDM and TPDA

Message ID 20220710021032.27455-1-quic_jinlmao@quicinc.com
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Series Coresight: Add support for TPDM and TPDA | expand

Message

Mao Jinlong July 10, 2022, 2:10 a.m. UTC
This series adds support for the trace performance monitoring and
diagnostics hardware (TPDM and TPDA). It is composed of two major
elements.
a) Changes for original coresight framework to support for TPDM and TPDA.
b) Add driver code for TPDM and TPDA.

Introduction of changes for original coresight framework
Support TPDM as new coresight source.
Since only STM and ETM are supported as coresight source originally.
TPDM is a newly added coresight source. We need to change
the original way of saving coresight path to support more types source
for coresight driver.
The following patch is to add support more coresight sources.
    coresight: core: Use IDR for non-cpu bound sources' paths.

Introduction of TPDM and TPDA
TPDM - The trace performance monitoring and diagnostics monitor or TPDM in
short serves as data collection component for various dataset types
specified in the QPMDA(Qualcomm performance monitoring and diagnostics
architecture) spec. The primary use case of the TPDM is to collect data
from different data sources and send it to a TPDA for packetization,
timestamping and funneling.
     Coresight: Add coresight TPDM source driver
     dt-bindings: arm: Adds CoreSight TPDM hardware definitions
     coresight-tpdm: Add DSB dataset support
     coresight-tpdm: Add integration test support
     docs: sysfs: coresight: Add sysfs ABI documentation for TPDM

TPDA - The trace performance monitoring and diagnostics aggregator or
TPDA in short serves as an arbitration and packetization engine for the
performance monitoring and diagnostics network as specified in the QPMDA
(Qualcomm performance monitoring and diagnostics architecture)
specification. The primary use case of the TPDA is to provide
packetization, funneling and timestamping of Monitor data as specified
in the QPMDA specification.
The following patch is to add driver for TPDA.
     Coresight: Add TPDA link driver
     dt-bindings: arm: Adds CoreSight TPDA hardware definitions

The last patch of this series is a device tree modification, which add
the TPDM and TPDA configuration to device tree for validating.
    ARM: dts: msm: Add coresight components for SM8250
    ARM: dts: msm: Add tpdm mm/prng for sm8250

Once this series patches are applied properly, the tpdm and tpda nodes
should be observed at the coresight path /sys/bus/coresight/devices
e.g.
/sys/bus/coresight/devices # ls -l | grep tpd
tpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0
tpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0

We can use the commands are similar to the below to validate TPDMs.
Enable coresight sink first.

echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
The test data will be collected in the coresight sink which is enabled.
If rwp register of the sink is keeping updating when do
integration_test (by cat tmc_etf0/mgmt/rwp), it means there is data
generated from TPDM to sink.

There must be a tpda between tpdm and the sink. When there are some
other trace event hw components in the same HW block with tpdm, tpdm
and these hw components will connect to the coresight funnel. When
there is only tpdm trace hw in the HW block, tpdm will connect to
tpda directly.
  
    +---------------+                +-------------+
    |  tpdm@6c08000 |                |tpdm@684C000 |
    +-------|-------+                +------|------+
            |                               |
    +-------|-------+                       |
    | funnel@6c0b000|                       |
    +-------|-------+                       |
            |                               |
    +-------|-------+                       |
    |funnel@6c2d000 |                       |
    +-------|-------+                       |
            |                               |
            |    +---------------+          |
            +----- tpda@6004000  -----------+
                 +-------|-------+
                         |
                 +-------|-------+
                 |funnel@6005000 |
                 +---------------+

This patch series depends on patch series:
"[v2,00/13] coresight: Add new API to allocate trace source ID values"
https://patchwork.kernel.org/project/linux-arm-kernel/cover/20220704081149.16797-1-mike.leach@linaro.org/

Changes from V11:
1. Clear bits for atid before setting them and relese atid when tpda
remove. -- Suzuki K Poulose <suzuki.poulose@arm.com>

Mao Jinlong (9):
  coresight: core: Use IDR for non-cpu bound sources' paths.
  Coresight: Add coresight TPDM source driver
  dt-bindings: arm: Adds CoreSight TPDM hardware definitions
  coresight-tpdm: Add DSB dataset support
  coresight-tpdm: Add integration test support
  Coresight: Add TPDA link driver
  dt-bindings: arm: Adds CoreSight TPDA hardware definitions
  arm64: dts: qcom: sm8250: Add coresight components
  arm64: dts: qcom: sm8250: Add tpdm mm/prng

 .../testing/sysfs-bus-coresight-devices-tpdm  |  13 +
 .../bindings/arm/qcom,coresight-tpda.yaml     | 111 +++
 .../bindings/arm/qcom,coresight-tpdm.yaml     |  93 +++
 MAINTAINERS                                   |   2 +
 arch/arm64/boot/dts/qcom/sm8250.dtsi          | 671 ++++++++++++++++++
 drivers/hwtracing/coresight/Kconfig           |  23 +
 drivers/hwtracing/coresight/Makefile          |   2 +
 drivers/hwtracing/coresight/coresight-core.c  |  42 +-
 drivers/hwtracing/coresight/coresight-tpda.c  | 208 ++++++
 drivers/hwtracing/coresight/coresight-tpda.h  |  35 +
 drivers/hwtracing/coresight/coresight-tpdm.c  | 259 +++++++
 drivers/hwtracing/coresight/coresight-tpdm.h  |  62 ++
 include/linux/coresight.h                     |   1 +
 13 files changed, 1510 insertions(+), 12 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
 create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
 create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
 create mode 100644 drivers/hwtracing/coresight/coresight-tpda.c
 create mode 100644 drivers/hwtracing/coresight/coresight-tpda.h
 create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.c
 create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.h

Comments

Mao Jinlong July 21, 2022, 3:30 p.m. UTC | #1
Hi all,

Please help to review V12 patches.

Thanks

Jinlong Mao

On 7/10/2022 10:10 AM, Mao Jinlong wrote:
> This series adds support for the trace performance monitoring and
> diagnostics hardware (TPDM and TPDA). It is composed of two major
> elements.
> a) Changes for original coresight framework to support for TPDM and TPDA.
> b) Add driver code for TPDM and TPDA.
>
> Introduction of changes for original coresight framework
> Support TPDM as new coresight source.
> Since only STM and ETM are supported as coresight source originally.
> TPDM is a newly added coresight source. We need to change
> the original way of saving coresight path to support more types source
> for coresight driver.
> The following patch is to add support more coresight sources.
>      coresight: core: Use IDR for non-cpu bound sources' paths.
>
> Introduction of TPDM and TPDA
> TPDM - The trace performance monitoring and diagnostics monitor or TPDM in
> short serves as data collection component for various dataset types
> specified in the QPMDA(Qualcomm performance monitoring and diagnostics
> architecture) spec. The primary use case of the TPDM is to collect data
> from different data sources and send it to a TPDA for packetization,
> timestamping and funneling.
>       Coresight: Add coresight TPDM source driver
>       dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>       coresight-tpdm: Add DSB dataset support
>       coresight-tpdm: Add integration test support
>       docs: sysfs: coresight: Add sysfs ABI documentation for TPDM
>
> TPDA - The trace performance monitoring and diagnostics aggregator or
> TPDA in short serves as an arbitration and packetization engine for the
> performance monitoring and diagnostics network as specified in the QPMDA
> (Qualcomm performance monitoring and diagnostics architecture)
> specification. The primary use case of the TPDA is to provide
> packetization, funneling and timestamping of Monitor data as specified
> in the QPMDA specification.
> The following patch is to add driver for TPDA.
>       Coresight: Add TPDA link driver
>       dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>
> The last patch of this series is a device tree modification, which add
> the TPDM and TPDA configuration to device tree for validating.
>      ARM: dts: msm: Add coresight components for SM8250
>      ARM: dts: msm: Add tpdm mm/prng for sm8250
>
> Once this series patches are applied properly, the tpdm and tpda nodes
> should be observed at the coresight path /sys/bus/coresight/devices
> e.g.
> /sys/bus/coresight/devices # ls -l | grep tpd
> tpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0
> tpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0
>
> We can use the commands are similar to the below to validate TPDMs.
> Enable coresight sink first.
>
> echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
> echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
> echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
> The test data will be collected in the coresight sink which is enabled.
> If rwp register of the sink is keeping updating when do
> integration_test (by cat tmc_etf0/mgmt/rwp), it means there is data
> generated from TPDM to sink.
>
> There must be a tpda between tpdm and the sink. When there are some
> other trace event hw components in the same HW block with tpdm, tpdm
> and these hw components will connect to the coresight funnel. When
> there is only tpdm trace hw in the HW block, tpdm will connect to
> tpda directly.
>    
>      +---------------+                +-------------+
>      |  tpdm@6c08000 |                |tpdm@684C000 |
>      +-------|-------+                +------|------+
>              |                               |
>      +-------|-------+                       |
>      | funnel@6c0b000|                       |
>      +-------|-------+                       |
>              |                               |
>      +-------|-------+                       |
>      |funnel@6c2d000 |                       |
>      +-------|-------+                       |
>              |                               |
>              |    +---------------+          |
>              +----- tpda@6004000  -----------+
>                   +-------|-------+
>                           |
>                   +-------|-------+
>                   |funnel@6005000 |
>                   +---------------+
>
> This patch series depends on patch series:
> "[v2,00/13] coresight: Add new API to allocate trace source ID values"
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20220704081149.16797-1-mike.leach@linaro.org/
>
> Changes from V11:
> 1. Clear bits for atid before setting them and relese atid when tpda
> remove. -- Suzuki K Poulose <suzuki.poulose@arm.com>
>
> Mao Jinlong (9):
>    coresight: core: Use IDR for non-cpu bound sources' paths.
>    Coresight: Add coresight TPDM source driver
>    dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>    coresight-tpdm: Add DSB dataset support
>    coresight-tpdm: Add integration test support
>    Coresight: Add TPDA link driver
>    dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>    arm64: dts: qcom: sm8250: Add coresight components
>    arm64: dts: qcom: sm8250: Add tpdm mm/prng
>
>   .../testing/sysfs-bus-coresight-devices-tpdm  |  13 +
>   .../bindings/arm/qcom,coresight-tpda.yaml     | 111 +++
>   .../bindings/arm/qcom,coresight-tpdm.yaml     |  93 +++
>   MAINTAINERS                                   |   2 +
>   arch/arm64/boot/dts/qcom/sm8250.dtsi          | 671 ++++++++++++++++++
>   drivers/hwtracing/coresight/Kconfig           |  23 +
>   drivers/hwtracing/coresight/Makefile          |   2 +
>   drivers/hwtracing/coresight/coresight-core.c  |  42 +-
>   drivers/hwtracing/coresight/coresight-tpda.c  | 208 ++++++
>   drivers/hwtracing/coresight/coresight-tpda.h  |  35 +
>   drivers/hwtracing/coresight/coresight-tpdm.c  | 259 +++++++
>   drivers/hwtracing/coresight/coresight-tpdm.h  |  62 ++
>   include/linux/coresight.h                     |   1 +
>   13 files changed, 1510 insertions(+), 12 deletions(-)
>   create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>   create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
>   create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
>   create mode 100644 drivers/hwtracing/coresight/coresight-tpda.c
>   create mode 100644 drivers/hwtracing/coresight/coresight-tpda.h
>   create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.c
>   create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.h
>
Mao Jinlong Aug. 2, 2022, 2:43 p.m. UTC | #2
Hi Reviewers,

Please help to review V12 series of TPDM/TPDA patches.

Thanks

Jinlong Mao

On 7/21/2022 11:30 PM, Jinlong Mao wrote:
> Hi all,
>
> Please help to review V12 patches.
>
> Thanks
>
> Jinlong Mao
>
> On 7/10/2022 10:10 AM, Mao Jinlong wrote:
>> This series adds support for the trace performance monitoring and
>> diagnostics hardware (TPDM and TPDA). It is composed of two major
>> elements.
>> a) Changes for original coresight framework to support for TPDM and 
>> TPDA.
>> b) Add driver code for TPDM and TPDA.
>>
>> Introduction of changes for original coresight framework
>> Support TPDM as new coresight source.
>> Since only STM and ETM are supported as coresight source originally.
>> TPDM is a newly added coresight source. We need to change
>> the original way of saving coresight path to support more types source
>> for coresight driver.
>> The following patch is to add support more coresight sources.
>>      coresight: core: Use IDR for non-cpu bound sources' paths.
>>
>> Introduction of TPDM and TPDA
>> TPDM - The trace performance monitoring and diagnostics monitor or 
>> TPDM in
>> short serves as data collection component for various dataset types
>> specified in the QPMDA(Qualcomm performance monitoring and diagnostics
>> architecture) spec. The primary use case of the TPDM is to collect data
>> from different data sources and send it to a TPDA for packetization,
>> timestamping and funneling.
>>       Coresight: Add coresight TPDM source driver
>>       dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>>       coresight-tpdm: Add DSB dataset support
>>       coresight-tpdm: Add integration test support
>>       docs: sysfs: coresight: Add sysfs ABI documentation for TPDM
>>
>> TPDA - The trace performance monitoring and diagnostics aggregator or
>> TPDA in short serves as an arbitration and packetization engine for the
>> performance monitoring and diagnostics network as specified in the QPMDA
>> (Qualcomm performance monitoring and diagnostics architecture)
>> specification. The primary use case of the TPDA is to provide
>> packetization, funneling and timestamping of Monitor data as specified
>> in the QPMDA specification.
>> The following patch is to add driver for TPDA.
>>       Coresight: Add TPDA link driver
>>       dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>>
>> The last patch of this series is a device tree modification, which add
>> the TPDM and TPDA configuration to device tree for validating.
>>      ARM: dts: msm: Add coresight components for SM8250
>>      ARM: dts: msm: Add tpdm mm/prng for sm8250
>>
>> Once this series patches are applied properly, the tpdm and tpda nodes
>> should be observed at the coresight path /sys/bus/coresight/devices
>> e.g.
>> /sys/bus/coresight/devices # ls -l | grep tpd
>> tpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0
>> tpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0
>>
>> We can use the commands are similar to the below to validate TPDMs.
>> Enable coresight sink first.
>>
>> echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
>> echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
>> echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
>> echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
>> The test data will be collected in the coresight sink which is enabled.
>> If rwp register of the sink is keeping updating when do
>> integration_test (by cat tmc_etf0/mgmt/rwp), it means there is data
>> generated from TPDM to sink.
>>
>> There must be a tpda between tpdm and the sink. When there are some
>> other trace event hw components in the same HW block with tpdm, tpdm
>> and these hw components will connect to the coresight funnel. When
>> there is only tpdm trace hw in the HW block, tpdm will connect to
>> tpda directly.
>>         +---------------+                +-------------+
>>      |  tpdm@6c08000 |                |tpdm@684C000 |
>>      +-------|-------+                +------|------+
>>              |                               |
>>      +-------|-------+                       |
>>      | funnel@6c0b000|                       |
>>      +-------|-------+                       |
>>              |                               |
>>      +-------|-------+                       |
>>      |funnel@6c2d000 |                       |
>>      +-------|-------+                       |
>>              |                               |
>>              |    +---------------+          |
>>              +----- tpda@6004000  -----------+
>>                   +-------|-------+
>>                           |
>>                   +-------|-------+
>>                   |funnel@6005000 |
>>                   +---------------+
>>
>> This patch series depends on patch series:
>> "[v2,00/13] coresight: Add new API to allocate trace source ID values"
>> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20220704081149.16797-1-mike.leach@linaro.org/ 
>>
>>
>> Changes from V11:
>> 1. Clear bits for atid before setting them and relese atid when tpda
>> remove. -- Suzuki K Poulose <suzuki.poulose@arm.com>
>>
>> Mao Jinlong (9):
>>    coresight: core: Use IDR for non-cpu bound sources' paths.
>>    Coresight: Add coresight TPDM source driver
>>    dt-bindings: arm: Adds CoreSight TPDM hardware definitions
>>    coresight-tpdm: Add DSB dataset support
>>    coresight-tpdm: Add integration test support
>>    Coresight: Add TPDA link driver
>>    dt-bindings: arm: Adds CoreSight TPDA hardware definitions
>>    arm64: dts: qcom: sm8250: Add coresight components
>>    arm64: dts: qcom: sm8250: Add tpdm mm/prng
>>
>>   .../testing/sysfs-bus-coresight-devices-tpdm  |  13 +
>>   .../bindings/arm/qcom,coresight-tpda.yaml     | 111 +++
>>   .../bindings/arm/qcom,coresight-tpdm.yaml     |  93 +++
>>   MAINTAINERS                                   |   2 +
>>   arch/arm64/boot/dts/qcom/sm8250.dtsi          | 671 ++++++++++++++++++
>>   drivers/hwtracing/coresight/Kconfig           |  23 +
>>   drivers/hwtracing/coresight/Makefile          |   2 +
>>   drivers/hwtracing/coresight/coresight-core.c  |  42 +-
>>   drivers/hwtracing/coresight/coresight-tpda.c  | 208 ++++++
>>   drivers/hwtracing/coresight/coresight-tpda.h  |  35 +
>>   drivers/hwtracing/coresight/coresight-tpdm.c  | 259 +++++++
>>   drivers/hwtracing/coresight/coresight-tpdm.h  |  62 ++
>>   include/linux/coresight.h                     |   1 +
>>   13 files changed, 1510 insertions(+), 12 deletions(-)
>>   create mode 100644 
>> Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
>>   create mode 100644 
>> Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
>>   create mode 100644 
>> Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
>>   create mode 100644 drivers/hwtracing/coresight/coresight-tpda.c
>>   create mode 100644 drivers/hwtracing/coresight/coresight-tpda.h
>>   create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.c
>>   create mode 100644 drivers/hwtracing/coresight/coresight-tpdm.h
>>
Trilok Soni Aug. 2, 2022, 5:33 p.m. UTC | #3
On 8/2/2022 7:43 AM, Jinlong Mao wrote:
> Hi Reviewers,
> 
> Please help to review V12 series of TPDM/TPDA patches.
> 
> Thanks
> 

Suzuki and Mathieu, we are almost there it seems in getting the 
acceptance of these patches, so I hope you find the time to review these 
patches. I guess it is almost a year now for these patches and had a 
good amount of reviews and revisions :)

---Trilok Soni
Suzuki K Poulose Aug. 2, 2022, 5:43 p.m. UTC | #4
Hi Trilok,

On 02/08/2022 18:33, Trilok Soni wrote:
> 
> 
> On 8/2/2022 7:43 AM, Jinlong Mao wrote:
>> Hi Reviewers,
>>
>> Please help to review V12 series of TPDM/TPDA patches.
>>
>> Thanks
>>
> 
> Suzuki and Mathieu, we are almost there it seems in getting the 
> acceptance of these patches, so I hope you find the time to review these 
> patches. I guess it is almost a year now for these patches and had a 
> good amount of reviews and revisions :)

This series has been reviewed for the previous versions (which is why
we have it in v12) and this one depends on a series worked on by Mike
Leach. We cannot push this without the dynamic Trace ID allocation
scheme, which is clearly mentioned in the cover letter for this
series.

As such this series is in a good shape, assuming all the comments
in the previous version has been addressed. So, we would rather
get Mike's work priority and pull that in, so that we can eventually
get this upstream.

Kind regards
Suzuki

> 
> ---Trilok Soni
Trilok Soni Aug. 2, 2022, 6:09 p.m. UTC | #5
Hi Suzuki,

On 8/2/2022 10:43 AM, Suzuki K Poulose wrote:
> Hi Trilok,
> 
> On 02/08/2022 18:33, Trilok Soni wrote:
>>
>>
>> On 8/2/2022 7:43 AM, Jinlong Mao wrote:
>>> Hi Reviewers,
>>>
>>> Please help to review V12 series of TPDM/TPDA patches.
>>>
>>> Thanks
>>>
>>
>> Suzuki and Mathieu, we are almost there it seems in getting the 
>> acceptance of these patches, so I hope you find the time to review 
>> these patches. I guess it is almost a year now for these patches and 
>> had a good amount of reviews and revisions :)
> 
> This series has been reviewed for the previous versions (which is why
> we have it in v12) and this one depends on a series worked on by Mike
> Leach. We cannot push this without the dynamic Trace ID allocation
> scheme, which is clearly mentioned in the cover letter for this
> series.
> 
> As such this series is in a good shape, assuming all the comments
> in the previous version has been addressed. So, we would rather
> get Mike's work priority and pull that in, so that we can eventually
> get this upstream.
> 
> 

I believe we have addressed all the comments in v12. Are you ok, if we 
post additional features series (around ~2k to ~3k SLOC)? I just want to 
make sure we are not creating flood of patches w/ features.

---Trilok Soni
Suzuki K Poulose Aug. 3, 2022, 9:05 a.m. UTC | #6
On 02/08/2022 19:09, Trilok Soni wrote:
> Hi Suzuki,
> 
> On 8/2/2022 10:43 AM, Suzuki K Poulose wrote:
>> Hi Trilok,
>>
>> On 02/08/2022 18:33, Trilok Soni wrote:
>>>
>>>
>>> On 8/2/2022 7:43 AM, Jinlong Mao wrote:
>>>> Hi Reviewers,
>>>>
>>>> Please help to review V12 series of TPDM/TPDA patches.
>>>>
>>>> Thanks
>>>>
>>>
>>> Suzuki and Mathieu, we are almost there it seems in getting the 
>>> acceptance of these patches, so I hope you find the time to review 
>>> these patches. I guess it is almost a year now for these patches and 
>>> had a good amount of reviews and revisions :)
>>
>> This series has been reviewed for the previous versions (which is why
>> we have it in v12) and this one depends on a series worked on by Mike
>> Leach. We cannot push this without the dynamic Trace ID allocation
>> scheme, which is clearly mentioned in the cover letter for this
>> series.
>>
>> As such this series is in a good shape, assuming all the comments
>> in the previous version has been addressed. So, we would rather
>> get Mike's work priority and pull that in, so that we can eventually
>> get this upstream.
>>
>>
> 
> I believe we have addressed all the comments in v12. Are you ok, if we 
> post additional features series (around ~2k to ~3k SLOC)? I just want to 
> make sure we are not creating flood of patches w/ features.

You are free to post the patches, as long as you clearly mention the
dependencies in the cover letter. Please be mindful about the merge window.

Suzuki