Messages in this thread | ![/](/images/icornerl.gif) | | From | Inochi Amaoto <> | Subject | Re: [PATCH v4 09/13] dt-bindings: riscv: Add T-Head PMU extension description | Date | Thu, 30 Nov 2023 16:29:22 +0800 |
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> >Hi Guo Ren, > >On Thu, Nov 23, 2023 at 05:14:30AM +0800, Guo Ren wrote: >> On Wed, Nov 22, 2023 at 8:17 PM Yu Chien Peter Lin >> <peterlin@andestech.com> wrote: >>> >>> Document the ISA string for T-Head performance monitor extension >>> which provides counter overflow interrupt mechanism. >>> >>> Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com> >>> --- >>> Changes v2 -> v3: >>> - New patch >>> Changes v3 -> v4: >>> - No change >>> --- >>> Documentation/devicetree/bindings/riscv/extensions.yaml | 6 ++++++ >>> 1 file changed, 6 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml >>> index c91ab0e46648..694efaea8fce 100644 >>> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml >>> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml >>> @@ -258,5 +258,11 @@ properties: >>> in commit 2e5236 ("Ztso is now ratified.") of the >>> riscv-isa-manual. >>> >>> + - const: xtheadpmu >>> + description: >>> + The T-Head performance monitor extension for counter overflow. For more >>> + details, see the chapter 12 in the Xuantie C906 user manual. >>> + https://github.com/T-head-Semi/openc906/tree/main/doc >>> + >>> additionalProperties: true >>> ... >>> -- >>> 2.34.1 >>> >> Reviewed-by: Guo Ren <guoren@kernel.org> > >Thanks for the review. >Would you share document about T-Head PMU? >
Hi, Peter Lin:
You can use the following two document to get all events: https://github.com/T-head-Semi/openc906/tree/main/doc https://github.com/T-head-Semi/openc910/tree/main/doc
There are also some RTL code can describe these events: https://github.com/T-head-Semi/openc910/blob/e0c4ad8ec7f8c70f649d826ebd6c949086453272/C910_RTL_FACTORY/gen_rtl/pmu/rtl/ct_hpcp_top.v#L1123 https://github.com/T-head-Semi/openc906/blob/af5614d72de7e5a4b8609c427d2e20af1deb21c4/C906_RTL_FACTORY/gen_rtl/pmu/rtl/aq_hpcp_top.v#L543
The perf events json can also be used as document, this is already applied (with more detailed explanation): https://lore.kernel.org/all/IA1PR20MB495325FCF603BAA841E29281BBBAA@IA1PR20MB4953.namprd20.prod.outlook.com/
Best regards, Inochi
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