linux-kernel - Re: [PATCH v4 07/13] RISC-V: Move T-Head PMU to CPU feature alternative framework

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20231123-snub-headdress-23a80f001ccd@wendy>
Date:   Thu, 23 Nov 2023 14:45:59 +0000
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Yu Chien Peter Lin <peterlin@...estech.com>
CC:     <acme@...nel.org>, <adrian.hunter@...el.com>,
        <ajones@...tanamicro.com>, <alexander.shishkin@...ux.intel.com>,
        <andre.przywara@....com>, <anup@...infault.org>,
        <aou@...s.berkeley.edu>, <atishp@...shpatra.org>,
        <conor+dt@...nel.org>, <conor@...nel.org>,
        <devicetree@...r.kernel.org>, <dminus@...estech.com>,
        <evan@...osinc.com>, <geert+renesas@...der.be>,
        <guoren@...nel.org>, <heiko@...ech.de>, <irogers@...gle.com>,
        <jernej.skrabec@...il.com>, <jolsa@...nel.org>,
        <jszhang@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <linux-renesas-soc@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-sunxi@...ts.linux.dev>,
        <locus84@...estech.com>, <magnus.damm@...il.com>,
        <mark.rutland@....com>, <mingo@...hat.com>, <n.shubin@...ro.com>,
        <namhyung@...nel.org>, <palmer@...belt.com>,
        <paul.walmsley@...ive.com>, <peterz@...radead.org>,
        <prabhakar.mahadev-lad.rj@...renesas.com>, <rdunlap@...radead.org>,
        <robh+dt@...nel.org>, <samuel@...lland.org>,
        <sunilvl@...tanamicro.com>, <tglx@...utronix.de>,
        <tim609@...estech.com>, <uwu@...nowy.me>, <wens@...e.org>,
        <will@...nel.org>, <ycliang@...estech.com>, <inochiama@...look.com>
Subject: Re: [PATCH v4 07/13] RISC-V: Move T-Head PMU to CPU feature
 alternative framework


>  drivers/perf/riscv_pmu_sbi.c         | 19 ++++++++++++++-----

> +config THEAD_CUSTOM_PMU
> +	bool "T-Head custom PMU support"
> +	depends on RISCV_ALTERNATIVE && RISCV_PMU_SBI
> +	default y
> +	help
> +	  The T-Head C9xx cores implement a PMU overflow extension very
> +	  similar to the core SSCOFPMF extension.
> +
> +	  This will patch the overflow CSR and handle the non-standard
> +	  behaviour via the regular SBI PMU driver and interface.
> +
> +	  If you don't know what to do here, say "Y".

This is a < 20 line diff to the pmu driver, is it really worth adding
having config options for these two non standard PMU implementations?

Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)