linux-kernel - Re: [PATCH v3] drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores

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Date:   Mon, 05 Sep 2022 16:30:48 +0200
From:   Andreas Schwab <schwab@...e.de>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     atishp@...shpatra.org, anup@...infault.org, will@...nel.org,
        mark.rutland@....com, paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Conor.Dooley@...rochip.com
Subject: Re: [PATCH v3] drivers/perf: riscv_pmu_sbi: add support for PMU
 variant on T-Head C9xx cores

On Sep 05 2022, Heiko Stuebner wrote:

> To work properly, this requires a matching change in SBI, though the actual
> interface between kernel and SBI does not change.

What happens if you mix different kernel and SBI versions?

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."