From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AC42C0044C for ; Wed, 31 Oct 2018 14:17:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 503972054F for ; Wed, 31 Oct 2018 14:17:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="BuFBCVuX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 503972054F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729526AbeJaXQE (ORCPT ); Wed, 31 Oct 2018 19:16:04 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:37156 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729463AbeJaXQE (ORCPT ); Wed, 31 Oct 2018 19:16:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; 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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=5pjh20Ro0or4wwBRda2IEnIozZqarrHiENSFS1VMJhE=; b=BuFBCVuXYQYdDo+hYUOMcSVgU JCwk9yZCD1fCrfH3dhU8/2G+dO+R1XelLjWfsmK885k/Nodc5W4Q+GXoYGGzW/KhOkfJjr+wh49IT um7KqIN0CyibrAz1ugCNvzg3jyfLjUkiekeyzc5/iVwRwosgieJ9wwpZqN5IJ7UvskkvC3sV8Jkbg 3QLqr41rg9dQt/bpeZaIO7djRQuYZE8fTisHBYBaYpC+O5HSkAIytrB6peYUEn3HsEwxYNTrMZCxo 5jXUdg/LgsomaJgQXEW1ecY0S3VznTgzKOwnu4UzWNBQqxh1UY5mT2J3lxa1g8PsDS7i7rMXPJs5S gyOKGVq+Q==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gHrJZ-0002mM-Ko; Wed, 31 Oct 2018 14:17:45 +0000 Date: Wed, 31 Oct 2018 07:17:45 -0700 From: Christoph Hellwig To: Anup Patel Cc: vincentc@andestech.com, Albert Ou , Arnd Bergmann , alankao@andestech.com, greentime@andestech.com, Palmer Dabbelt , "linux-kernel@vger.kernel.org List" , Zong Li , linux-riscv@lists.infradead.org, deanbo422@gmail.com Subject: Re: [RFC 0/2] RISC-V: A proposal to add vendor-specific code Message-ID: <20181031141745.GA5183@infradead.org> References: <1540982130-28248-1-git-send-email-vincentc@andestech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 31, 2018 at 04:46:10PM +0530, Anup Patel wrote: > I agree that we need a place for vendor-specific ISA extensions and > having vendor-specific directories is also good. The only sensible answer is that we should not allow vendor specific extensions in the kernel at all. We need to standardize cache flushing and we need to do it soon and not introduce horrible bandaids because the foundation did not do its work.