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

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Message-ID: <4b22e7c4-4d3d-43b9-bc27-ffd7a86ad26a@rivosinc.com>
Date: Wed, 26 Nov 2025 07:38:57 +0100
From: Clément Léger <cleger@...osinc.com>
To: Paul Walmsley <pjw@...nel.org>
Cc: 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



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.

Hey Paul,

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.

Thanks,

Clément


> 
> 
> - Paul