linux-kernel - Re: [PATCH v8 0/5] riscv: add support for SBI Supervisor Software Events

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Message-ID: <39079362-64ce-e951-6906-0302b1e9e55d@kernel.org>
Date: Wed, 26 Nov 2025 13:00:28 -0700 (MST)
From: Paul Walmsley <pjw@...nel.org>
To: Clément Léger <cleger@...osinc.com>
cc: Paul Walmsley <pjw@...nel.org>, linux-riscv@...ts.infradead.org, 
    paul.walmsley@...ive.com, palmer@...belt.com, linux-kernel@...r.kernel.org, 
    linux-arm-kernel@...ts.infradead.org, hchauhan@...tanamicro.com, 
    apatel@...tanamicro.com, luxu.kernel@...edance.com, atishp@...shpatra.org, 
    bjorn@...osinc.com, cuiyunhui@...edance.com, 
    张展鹏 <zhangzhanpeng.jasper@...edance.com>
Subject: Re: [PATCH v8 0/5] riscv: add support for SBI Supervisor Software
 Events

Hi Clément,

On Wed, 26 Nov 2025, Clément Léger wrote:

> On 11/19/25 16:52, Paul Walmsley wrote:
> > 
> > To add more context:
> > 
> > On Wed, 19 Nov 2025, patchwork-bot+linux-riscv@...nel.org wrote:
> > 
> >> This series was applied to riscv/linux.git (for-next)
> >> by Paul Walmsley <pjw@...nel.org>:
> >>
> >> On Wed,  5 Nov 2025 08:26:32 +0000 you wrote:
> >>> The SBI Supervisor Software Events (SSE) extensions provides a mechanism
> >>> to inject software events from an SBI implementation to supervisor
> >>> software such that it preempts all other supervisor level traps and
> >>> interrupts. This extension is introduced by the SBI v3.0 specification[1].
> >>>
> >>> Various events are defined and can be send asynchronously to supervisor
> >>> software (RAS, PMU, DEBUG, Asynchronous page fault) from SBI as well
> >>> as platform specific events. Events can be either local (per-hart) or
> >>> global. Events can be nested on top of each other based on priority and
> >>> can interrupt the kernel at any time.
> >>>
> >>> [...]
> >>
> >> Here is the summary with links:
> >>   - [v8,1/5] riscv: add SBI SSE extension definitions
> >>     https://git.kernel.org/riscv/c/7bba38249b8a
> >>   - [v8,2/5] riscv: add support for SBI Supervisor Software Events extension
> >>     https://git.kernel.org/riscv/c/b52179e6de7d
> >>   - [v8,3/5] drivers: firmware: add riscv SSE support
> >>     https://git.kernel.org/riscv/c/5ffe60d26107
> >>   - [v8,4/5] perf: RISC-V: add support for SSE event
> >>     https://git.kernel.org/riscv/c/c6f3f04d2a9c
> >>   - [v8,5/5] selftests/riscv: add SSE test module
> >>     https://git.kernel.org/riscv/c/a123316660af
> > 
> > This is a pretty sophisticated series.  I was hoping to get more test 
> > reports on it and reviews (as Clément requested as well). In the meantime 
> > I've pulled them into for-next in the hopes that it might increase the 
> > number of potential testers.  Am still very much interested in any test 
> > reports or additional reviews; if they come in this week, I'll consider 
> > rebuilding for-next to add them.
> 
> Since we gathered additional bug/starvation reports with SSE from
> Zhanpeng, it would be preferable to remove this series from your branch
> if still possible. I'm not currently really available (just had a
> newborn) so I won't be able to fix this quickly.

No problem, we'll drop it.


Congratulations on the new addition to your family,

- Paul