From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6DBF37F for ; Thu, 5 Oct 2023 06:50:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="P/GmtBrN" Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DBEF87287; Wed, 4 Oct 2023 23:50:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=PXvaL0YHKWoIp6ItLWn51f3AysUSNJgd0DaMiX2uAic=; b=P/GmtBrNdqyYciQSKghQIq5uyU hAQNHtExo+DtJclOklF5ySyh1Lj4xOOiJXjgMy4miZrkA9GcqmBCkfYR/+RvBfHCIt5cQM5u6jtAI oxHAl1beCpW8u4KIsFqmtp6fGtOeOr5uZUqdofoofJkEpDL277Lz25nqvR3AX7k33eQwxU/4P8OFf k8n3d2xVqtLb2Ag9VC1rJvUH7fm3CPzHigzM3j0gC0dr8j7Su1wkflAur6vCYoBqMqm5hiwqfVvg/ U4T9c6FL0hTayMyVrZuFzJ9OoFSE/4yAd8Ii6SzVEUOzhr3R7t2cqjdFdh9tAu03O4VqA7LqVecy1 ZN3AoFvw==; Received: from hch by bombadil.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qoIBI-001XnF-1g; Thu, 05 Oct 2023 06:49:56 +0000 Date: Wed, 4 Oct 2023 23:49:56 -0700 From: Christoph Hellwig To: Anup Patel Cc: Christoph Hellwig , Paolo Bonzini , Atish Patra , Palmer Dabbelt , Paul Walmsley , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Shuah Khan , Andrew Jones , Mayuresh Chitale , devicetree@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 1/7] RISC-V: Detect XVentanaCondOps from ISA string Message-ID: References: <20230919035343.1399389-1-apatel@ventanamicro.com> <20230919035343.1399389-2-apatel@ventanamicro.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On Mon, Oct 02, 2023 at 09:06:08PM +0530, Anup Patel wrote: > > extensions? > > > > We already have few T-Head specific extensions so Linux RISC-V > does allow vendor extensions. Only for kernel internal operation and to actually boot the chip. IMHO still the wrong tradeoff, but very different from actually user visible extensions that will lead to fragmentation of the ecoysystem.