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From:   Heiko Stuebner <heiko@sntech.de>
To:     atishp@atishpatra.org, anup@brainfault.org, will@kernel.org,
        mark.rutland@arm.com, paul.walmsley@sifive.com, palmer@dabbelt.com,
        aou@eecs.berkeley.edu
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        Conor.Dooley@microchip.com, ajones@ventanamicro.com,
        Heiko Stuebner <heiko@sntech.de>
Subject: [PATCH v5 0/2] riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores
Date:   Mon, 10 Oct 2022 14:27:24 +0200
Message-Id: <20221010122726.2405153-1-heiko@sntech.de>
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The PMU on T-Head C9xx cores is quite similar to the SSCOFPMF extension
but not completely identical, so this series

changes in v5:
- add received Reviews
- fix sbi caching wrt. negative values (Drew)
- add comment about specific c9xx arch- and imp-ids (Conor)

changes in v4:
- add new patch to cache sbi mvendor, march and mimp-ids (Atish)
- errata dependencies in one line (Conor)
- make driver detection conditional on CONFIG_ERRATA_THEAD_PMU too (Atish)

changes in v3:
- improve commit message (Atish, Conor)
- IS_ENABLED and BIT() in errata probe (Conor)

The change depends on my cpufeature/t-head errata probe cleanup series [1].


changes in v2:
- use alternatives for the CSR access
- make the irq num selection a bit nicer

There is of course a matching opensbi-part whose most recent implementation
can be found on [0].


[0] https://patchwork.ozlabs.org/project/opensbi/cover/20221004164227.1381825-1-heiko@sntech.de
[1] https://lore.kernel.org/all/20220905111027.2463297-1-heiko@sntech.de/

Heiko Stuebner (2):
  RISC-V: Cache SBI vendor values
  drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head
    C9xx cores

 arch/riscv/Kconfig.erratas           | 13 +++++++++++
 arch/riscv/errata/thead/errata.c     | 19 ++++++++++++++++
 arch/riscv/include/asm/errata_list.h | 16 +++++++++++++-
 arch/riscv/kernel/sbi.c              | 30 ++++++++++++++++++++++---
 drivers/perf/riscv_pmu_sbi.c         | 33 +++++++++++++++++++---------
 5 files changed, 97 insertions(+), 14 deletions(-)

-- 
2.35.1