linux-kernel - Re: [PATCH v6 0/8] Add SBI v3.0 PMU enhancements

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Message-ID: <f740b716-6c8b-46a5-31ae-ecc37e766152@kernel.org>
Date: Mon, 15 Sep 2025 00:25:52 -0600 (MDT)
From: Paul Walmsley <pjw@...nel.org>
To: Atish Patra <atishp@...osinc.com>, Anup Patel <anup@...infault.org>
cc: Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, 
    Paul Walmsley <paul.walmsley@...ive.com>, 
    Palmer Dabbelt <palmer@...belt.com>, 
    Mayuresh Chitale <mchitale@...tanamicro.com>, 
    linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
    linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
    kvm-riscv@...ts.infradead.org, Sean Christopherson <seanjc@...gle.com>
Subject: Re: [PATCH v6 0/8] Add SBI v3.0 PMU enhancements

On Tue, 9 Sep 2025, Atish Patra wrote:

> SBI v3.0 specification[1] added two new improvements to the PMU chaper.
> The SBI v3.0 specification is frozen and under public review phase as
> per the RISC-V International guidelines. 
> 
> 1. Added an additional get_event_info function to query event availablity
> in bulk instead of individual SBI calls for each event. This helps in
> improving the boot time.
> 
> 2. Raw event width allowed by the platform is widened to have 56 bits
> with RAW event v2 as per new clarification in the priv ISA[2].
> 
> Apart from implementing these new features, this series improves the gpa
> range check in KVM and updates the kvm SBI implementation to SBI v3.0.
> 
> The opensbi patches have been merged. This series can be found at [3].
> 
> [1] https://github.com/riscv-non-isa/riscv-sbi-doc/releases/download/v3.0-rc7/riscv-sbi.pdf 
> [2] https://github.com/riscv/riscv-isa-manual/issues/1578
> [3] https://github.com/atishp04/linux/tree/b4/pmu_event_info_v6
> 
> Signed-off-by: Atish Patra <atishp@...osinc.com>

For the series:

Acked-by: Paul Walmsley <pjw@...nel.org>


- Paul