[PATCH v14 0/6] Enable PMUs in ACPI systems

[Jeremy Linton]

Hi,

On 01/24/2017 12:46 AM, Ganapatrao Kulkarni wrote:
> Hi Jeremy,
>
> do you have any public git branch to try these patches?

No, not at this time, sorry...



>
> thanks
> Ganapat
>
> On Tue, Jan 24, 2017 at 4:02 AM, Jeremy Linton <jeremy.linton at arm.com> wrote:
>> This patch expands and reworks the patches published by Mark Salter
>> in order to clean up a few of the previous review comments, as well as
>> add support for newer CPUs and big/little configurations.
>>
>> v14:
>> - drop rename patch requested for v6
>> - Shuffle couple include lines from one patch to a later
>>   patch.
>>
>> v13:
>> - Correct int/bool conversion bug in pmu_acpi_init()
>>   created during v10 code shuffle
>>
>> v12:
>> - Rebase to 4.10
>> - Removed lock in the hotplug path.
>>
>> v11:
>> - Add is_smp() check to read_specific_cpuid() for arch/arm. Update
>>   c_show() and various routines in arm_pmu_acpi() to use the macro.
>> - Moved the duplicate "generic" pmu detection code into its own
>>   patch and hoist it into arm_pmu_device_probe() so it works
>>   for DT based systems as well.
>>
>> v10:
>> - Rebase to 4.9
>> - Rework the arm_perf_start_cpu changes to support the 4.9 hotplug
>>   changes.
>> - Remove the call to acpi_register_gsi() from the cpu online code path.
>>   Instead the GSI's are registered during the initcall. This changes
>>   the error handling a bit because we now try to clean up the
>>   previously registered GSIs in a couple important places. This
>>   was also a result of the rebase.
>> - Dropped the MIDR partnumber usage, its no longer necessary to
>>   differentiate by only the partnum, so this helps to clarify the code
>>   a bit.
>> - Shuffle some code around and rename a few variables.
>> - Added a few comments to hopefully clarify some questions people have
>>   previously had about unused MADT entries, skipping processing cores
>>   with MIDR=0, etc.
>>
>> v9:
>> - Add/cleanup an additional hotplug patch I've had sitting around. This
>>   patch brings the ACPI PMU mostly on par with the DT functionality with
>>   respect to having CPUs offline during boot. This should help clarify
>>   some of the code structuring.
>> - Cleanup the list of PMU types early if we fail to allocate memory for an
>>   additional pmu type.
>>
>> v8:
>> - Rebase to 4.8rc4
>> - Assorted minor comment/hunk placement/etc tweaks per Punit Agrawal
>>
>> v7:
>> - Rebase to 4.8rc3
>> - Remove cpu affinity sysfs entry. While providing a CPU mask for
>>   ARMv8 PMU's is really helpful in big/little environments, reworking
>>   the PMU code to support the cpumask attribute for !arm64 PMUs is out
>>   of the scope of this patch set.
>> - Fix CPU miscount problem where an alloc failure followed by successfully
>>   allocating the structure can result in under counting the CPUs associated
>>   with the PMU. This bug was created in v6 with the conversion to a linked
>>   list.
>> - Remove initial platform device creation code by Mark Salter, and re-squash
>>   multiple platform device creation code together with helper routines.
>>   Other minor tweakage.
>>
>> v6:
>> - Added cpu affinity sysfs entry
>> - Converted pmu_types array, to linked list
>> - Restrict use of the armv8_pmu_probe_table to ACPI systems
>> - Rename MADT parsing routines in smp.c
>> - Convert sysfs PMU name to use index rather than partnum
>> - Remove pr_devel statements
>> - Other Minor cleanups
>> - Add Partial Ack-by Will Deacon
>>
>> v5:
>> - Remove list of CPU types for ACPI systems. We now match a generic
>>   event list, and use the PMCIED[01] to select events which exist on
>>   the given PMU. This avoids the need to update the kernel every time
>>   a new CPU is released.
>> - Update the maintainers list to include the new file.
>>
>> v4:
>> - Correct build issues with ARM (!ARM64) kernels.
>> - Add ThunderX to list of PMU types.
>>
>>
>> Jeremy Linton (5):
>>   arm: arm64: Add routine to determine cpuid of other cpus
>>   arm: arm64: pmu: Assign platform PMU CPU affinity
>>   arm64: pmu: Detect multiple generic PMUs and append counter
>>   arm64: pmu: Detect and enable multiple PMUs in an ACPI system
>>   arm: pmu: Add PMU definitions for cores not initially online
>>
>> Mark Salter (1):
>>   arm64: pmu: Cache PMU interrupt numbers from MADT parse
>>
>>  arch/arm/include/asm/cputype.h   |   4 +
>>  arch/arm/kernel/setup.c          |   2 +-
>>  arch/arm64/include/asm/cputype.h |   3 +
>>  arch/arm64/kernel/perf_event.c   |   2 +-
>>  arch/arm64/kernel/smp.c          |   5 +
>>  drivers/perf/Kconfig             |   4 +
>>  drivers/perf/Makefile            |   1 +
>>  drivers/perf/arm_pmu.c           | 103 +++++++++++++--
>>  drivers/perf/arm_pmu_acpi.c      | 271 +++++++++++++++++++++++++++++++++++++++
>>  include/linux/perf/arm_pmu.h     |  12 ++
>>  10 files changed, 393 insertions(+), 14 deletions(-)
>>  create mode 100644 drivers/perf/arm_pmu_acpi.c
>>
>> --
>> 2.7.4
>>
>>
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