From: Drew Fustini <fustini@kernel.org>
To: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
Cc: Drew Fustini <dfustini@oss.tenstorrent.com>,
Joel Stanley <jms@oss.tenstorrent.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, Michael Neuling <mikey@neuling.org>
Subject: Re: [PATCH] riscv: dts: tenstorrent: Add PMU node to blackhole for Linux perf support
Date: Fri, 10 Apr 2026 18:38:35 -0700 [thread overview]
Message-ID: <admmG0jkzpx0OzXi@x1> (raw)
In-Reply-To: <20260409-blackhole_pmu-v1-1-01a34bf46a1c@oss.tenstorrent.com>
On Thu, Apr 09, 2026 at 09:49:59PM -0500, Anirudh Srinivasan wrote:
> From: Michael Neuling <mikey@neuling.org>
>
> Add a riscv,pmu device tree node with SBI PMU event mappings for the
> SiFive X280 hardware performance counters. This enables OpenSBI to
> expose the SBI PMU extension, allowing Linux perf to use the 4
> programmable counters (mhpmcounter3-6) across 3 event classes:
> instruction commit, microarchitectural, and memory system events.
>
> Event encodings are derived from the SiFive Tenstorrent X280 MC Manual
> (21G3.04.00) Table 13, section 3.10.5.
>
> Assisted-by: Claude:claude-opus-4-6[1m]
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> Signed-off-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com>
> ---
> Added a dependency of [1] to b4 so that checkpatch doesn't complain
> about the Assisted-by tag
>
> [1] https://lore.kernel.org/all/20260311152039.254244-1-sashal@kernel.org/
> ---
> arch/riscv/boot/dts/tenstorrent/blackhole.dtsi | 48 ++++++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
Reviewed-by: Drew Fustini <fustini@kernel.org>
If there are no objections, then I will apply it to
tenstorrent-dt-for-next.
Thanks,
Drew
prev parent reply other threads:[~2026-04-11 1:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-10 2:49 [PATCH] riscv: dts: tenstorrent: Add PMU node to blackhole for Linux perf support Anirudh Srinivasan
2026-04-11 1:38 ` Drew Fustini [this message]
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