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=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,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 7CD20ECDE44 for ; Thu, 1 Nov 2018 00:57:03 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3582820664 for ; Thu, 1 Nov 2018 00:57:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hcmkbu2N" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3582820664 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=andestech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bgZwKUVfFUAGRD4lnY5pw9e1SDgH95iiZisILdjyXko=; b=hcmkbu2Nywprsc /GeEWfQfDuPgkQ1buByXMBJUVamzRbr4qlOONvr04ayN3iueNg2M1982M4QAW4kDriGLB17YhEY1J UdeBB1id9KWtgFEm+N8PrShsKrPmdyY1+zU4jxFtoIilSlBpb5j4qEbZhiiT7nnK/ZCb+to/UTH+H AZs8VGEiMDQ5xIZNd51mGbi+muvP5y7YKuuYtCiNDcRAb/MTeAkbnlwneavt/umi90QQD07CR9cga zHh0sb9sNWMhU5jSRcT7DC8Qyd9MRXJldHr8uq3W4W+ija2erWQSKYrthRg9K1vCerrQozDG3PDfM AX/LD4q3jcoaNjPVyRTg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gI1ID-00012O-7U; Thu, 01 Nov 2018 00:57:01 +0000 Received: from 59-120-53-16.hinet-ip.hinet.net ([59.120.53.16] helo=ATCSQR.andestech.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gI1IA-00011O-Os for linux-riscv@lists.infradead.org; Thu, 01 Nov 2018 00:57:00 +0000 Received: from mail.andestech.com (atcpcs16.andestech.com [10.0.1.222]) by ATCSQR.andestech.com with ESMTP id wA10uZUK012526; Thu, 1 Nov 2018 08:56:35 +0800 (GMT-8) (envelope-from alankao@andestech.com) Received: from andestech.com (10.0.15.65) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.123.3; Thu, 1 Nov 2018 08:55:41 +0800 Date: Thu, 1 Nov 2018 08:55:42 +0800 From: Alan Kao To: Christoph Hellwig Subject: Re: [RFC 0/2] RISC-V: A proposal to add vendor-specific code Message-ID: <20181101005541.GA25604@andestech.com> References: <1540982130-28248-1-git-send-email-vincentc@andestech.com> <20181031141745.GA5183@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181031141745.GA5183@infradead.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-Originating-IP: [10.0.15.65] X-DNSRBL: X-MAIL: ATCSQR.andestech.com wA10uZUK012526 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181031_175659_060363_88DB4BA4 X-CRM114-Status: UNSURE ( 9.80 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vincentc@andestech.com, Albert Ou , Arnd Bergmann , greentime@andestech.com, Anup Patel , Palmer Dabbelt , "linux-kernel@vger.kernel.org List" , Zong Li , linux-riscv@lists.infradead.org, deanbo422@gmail.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Message-ID: <20181101005542._2AXlHha-UQcm1cf5FDcIJ3nWpOQYdxHqGAi0C0Uu0c@z> On Wed, Oct 31, 2018 at 07:17:45AM -0700, Christoph Hellwig wrote: > 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. ... How can this even be possible if a extension includes an extra register set as some domain-specific context? In such a case, kernel should at least process the context during any context switch, just like how it deals with the FP context. > ... 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. > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv