Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
In-Reply-To: <20230407231103.2622178-1-evan@rivosinc.com>
References: <20230407231103.2622178-1-evan@rivosinc.com>
Subject: Re: [PATCH v6 0/6] RISC-V Hardware Probing User Interface
Message-Id: <168201218504.13763.1031176103296142331.b4-ty@rivosinc.com>
Date:   Thu, 20 Apr 2023 10:36:25 -0700
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Cc:     slewis@rivosinc.com, heiko@sntech.de,
        Conor Dooley <conor@kernel.org>,
        Vineet Gupta <vineetg@rivosinc.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Andrew Bresticker <abrestic@rivosinc.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Anup Patel <apatel@ventanamicro.com>,
        Atish Patra <atishp@rivosinc.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Celeste Liu <coelacanthus@outlook.com>,
        Conor Dooley <conor.dooley@microchip.com>,
        Guo Ren <guoren@kernel.org>,
        Heiko Carstens <hca@linux.ibm.com>,
        Heiko Stuebner <heiko.stuebner@vrull.eu>,
        Jann Horn <jannh@google.com>,
        Jisheng Zhang <jszhang@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Ley Foon Tan <leyfoon.tan@starfivetech.com>,
        "Liam R. Howlett" <Liam.Howlett@Oracle.com>,
        Mark Brown <broonie@kernel.org>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Nathan Chancellor <nathan@kernel.org>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Philipp Tomsich <philipp.tomsich@vrull.eu>,
        Samuel Holland <samuel@sholland.org>,
        Shuah Khan <shuah@kernel.org>,
        Sunil V L <sunilvl@ventanamicro.com>,
        Tobias Klauser <tklauser@distanz.ch>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org
From:   Palmer Dabbelt <palmer@rivosinc.com>
To:     Evan Green <evan@rivosinc.com>
Precedence: bulk


On Fri, 07 Apr 2023 16:10:57 -0700, Evan Green wrote:
> There's been a bunch of off-list discussions about this, including at
> Plumbers.  The original plan was to do something involving providing an
> ISA string to userspace, but ISA strings just aren't sufficient for a
> stable ABI any more: in order to parse an ISA string users need the
> version of the specifications that the string is written to, the version
> of each extension (sometimes at a finer granularity than the RISC-V
> releases/versions encode), and the expected use case for the ISA string
> (ie, is it a U-mode or M-mode string).  That's a lot of complexity to
> try and keep ABI compatible and it's probably going to continue to grow,
> as even if there's no more complexity in the specifications we'll have
> to deal with the various ISA string parsing oddities that end up all
> over userspace.
> 
> [...]

Applied, thanks!

[1/6] RISC-V: Move struct riscv_cpuinfo to new header
      https://git.kernel.org/palmer/c/ff77cf5b2e03
[2/6] RISC-V: Add a syscall for HW probing
      https://git.kernel.org/palmer/c/ea3de9ce8aa2
[3/6] RISC-V: hwprobe: Add support for RISCV_HWPROBE_BASE_BEHAVIOR_IMA
      https://git.kernel.org/palmer/c/00e76e2c6a2b
[4/6] RISC-V: hwprobe: Support probing of misaligned access performance
      https://git.kernel.org/palmer/c/62a31d6e38bd
[5/6] selftests: Test the new RISC-V hwprobe interface
      https://git.kernel.org/palmer/c/287dcc2b0c83
[6/6] RISC-V: Add hwprobe vDSO function and data
      https://git.kernel.org/palmer/c/aa5af0aa90ba

Best regards,
-- 
Palmer Dabbelt <palmer@rivosinc.com>