linux-kernel - Re: [PATCH v8 00/10] Support Andes PMU extension

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Date: Thu, 22 Feb 2024 11:23:00 +0800
From: Yu-Chien Peter Lin <peterlin@...estech.com>
To: Palmer Dabbelt <palmer@...belt.com>
CC: <acme@...nel.org>, <adrian.hunter@...el.com>, <ajones@...tanamicro.com>,
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Subject: Re: [PATCH v8 00/10] Support Andes PMU extension

Hi Palmer,

On Wed, Feb 21, 2024 at 12:58:31PM -0800, Palmer Dabbelt wrote:
> On Mon, 29 Jan 2024 01:25:43 PST (-0800), peterlin@...estech.com wrote:
> > Hi All,
> > 
> > This patch series introduces the Andes PMU extension, which serves the
> > same purpose as Sscofpmf and Smcntrpmf. Its non-standard local interrupt
> > is assigned to bit 18 in the custom S-mode local interrupt enable and
> > pending registers (slie/slip), while the interrupt cause is (256 + 18).
> > 
> > Linux patches based on:
> > - ed5b7cf ("riscv: errata: andes: Probe for IOCP only once in boot stage")
> > It can be found on Andes Technology GitHub:
> > - https://github.com/andestech/linux/commits/andes-pmu-support-v8
> > 
> > The PMU device tree node used on AX45MP:
> > - https://github.com/riscv-software-src/opensbi/blob/master/docs/pmu_support.md#example-3
> > 
> > Locus Wei-Han Chen (1):
> >   riscv: andes: Support specifying symbolic firmware and hardware raw
> >     events
> > 
> > Yu Chien Peter Lin (9):
> >   riscv: errata: Rename defines for Andes
> >   irqchip/riscv-intc: Allow large non-standard interrupt number
> >   irqchip/riscv-intc: Introduce Andes hart-level interrupt controller
> >   dt-bindings: riscv: Add Andes interrupt controller compatible string
> >   riscv: dts: renesas: r9a07g043f: Update compatible string to use Andes
> >     INTC
> >   perf: RISC-V: Eliminate redundant interrupt enable/disable operations
> >   perf: RISC-V: Introduce Andes PMU to support perf event sampling
> >   dt-bindings: riscv: Add Andes PMU extension description
> >   riscv: dts: renesas: Add Andes PMU extension for r9a07g043f
> > 
> >  .../devicetree/bindings/riscv/cpus.yaml       |   6 +-
> >  .../devicetree/bindings/riscv/extensions.yaml |   7 +
> >  arch/riscv/boot/dts/renesas/r9a07g043f.dtsi   |   4 +-
> >  arch/riscv/errata/andes/errata.c              |  10 +-
> >  arch/riscv/include/asm/errata_list.h          |  13 +-
> >  arch/riscv/include/asm/hwcap.h                |   1 +
> >  arch/riscv/include/asm/vendorid_list.h        |   2 +-
> >  arch/riscv/kernel/alternative.c               |   2 +-
> >  arch/riscv/kernel/cpufeature.c                |   1 +
> >  drivers/irqchip/irq-riscv-intc.c              |  88 ++++++++++--
> >  drivers/perf/Kconfig                          |  14 ++
> >  drivers/perf/riscv_pmu_sbi.c                  |  37 ++++-
> >  include/linux/soc/andes/irq.h                 |  18 +++
> >  .../arch/riscv/andes/ax45/firmware.json       |  68 ++++++++++
> >  .../arch/riscv/andes/ax45/instructions.json   | 127 ++++++++++++++++++
> >  .../arch/riscv/andes/ax45/memory.json         |  57 ++++++++
> >  .../arch/riscv/andes/ax45/microarch.json      |  77 +++++++++++
> >  tools/perf/pmu-events/arch/riscv/mapfile.csv  |   1 +
> >  18 files changed, 494 insertions(+), 39 deletions(-)
> >  create mode 100644 include/linux/soc/andes/irq.h
> >  create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/firmware.json
> >  create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/instructions.json
> >  create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/memory.json
> >  create mode 100644 tools/perf/pmu-events/arch/riscv/andes/ax45/microarch.json
> 
> Acked-by: Palmer Dabbelt <palmer@...osinc.com>
> 
> in case someone wants to take this via another tree.  I'm also OK taking it
> via the RISC-V tree, pending a resolution to Thomas' comments on patch 2.
> For now I'm going to assume there's a v9 coming.

Yes, I'm working on v9, please hold off taking the series, thanks.

Regards,
Peter Lin

> Thanks!