From: "Pratik R. Sampat" <psampat@linux.ibm.com>
To: mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org,
linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
linux-kernel@vger.kernel.org, psampat@linux.ibm.com,
pratik.r.sampat@gmail.com
Subject: [PATCH 0/1] Interface to represent PAPR firmware attributes
Date: Wed, 16 Jun 2021 19:12:39 +0530 [thread overview]
Message-ID: <20210616134240.62195-1-psampat@linux.ibm.com> (raw)
RFC --> v1
RFC: https://lkml.org/lkml/2021/6/4/791
Changelog:
Overhaul in interface design to the following:
/sys/firmware/papr/energy_scale_info/
|-- <id>/
|-- desc
|-- value
|-- value_desc (if exists)
|-- <id>/
|-- desc
|-- value
|-- value_desc (if exists)
Also implemented a POC using this interface for the powerpc-utils'
ppc64_cpu --frequency command-line tool to utilize this information
in userspace.
The POC for the new interface has been hosted here:
https://github.com/pratiksampat/powerpc-utils/tree/H_GET_ENERGY_SCALE_INFO_v2
Sample output from the powerpc-utils tool is as follows:
# ppc64_cpu --frequency
Power and Performance Mode: XXXX
Idle Power Saver Status : XXXX
Processor Folding Status : XXXX --> Printed if Idle power save status is supported
Platform reported frequencies --> Frequencies reported from the platform's H_CALL i.e PAPR interface
min : NNNN GHz
max : NNNN GHz
static : NNNN GHz
Tool Computed frequencies
min : NNNN GHz (cpu XX)
max : NNNN GHz (cpu XX)
avg : NNNN GHz
Pratik R. Sampat (1):
powerpc/pseries: Interface to represent PAPR firmware attributes
.../sysfs-firmware-papr-energy-scale-info | 26 ++
arch/powerpc/include/asm/hvcall.h | 21 +-
arch/powerpc/kvm/trace_hv.h | 1 +
arch/powerpc/platforms/pseries/Makefile | 3 +-
.../pseries/papr_platform_attributes.c | 292 ++++++++++++++++++
5 files changed, 341 insertions(+), 2 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-firmware-papr-energy-scale-info
create mode 100644 arch/powerpc/platforms/pseries/papr_platform_attributes.c
--
2.30.2
next reply other threads:[~2021-06-16 13:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 13:42 Pratik R. Sampat [this message]
2021-06-16 13:42 ` [PATCH 1/1] powerpc/pseries: Interface to represent PAPR firmware attributes Pratik R. Sampat
2021-06-18 9:02 ` Gautham R Shenoy
2021-06-18 20:58 ` Fabiano Rosas
2021-06-21 15:35 ` Pratik Sampat
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