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_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, 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 17A0AC433F5 for ; Mon, 10 Sep 2018 13:35:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3B062086E for ; Mon, 10 Sep 2018 13:35:56 +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="a6SSzBUD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3B062086E 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 S1728663AbeIJSaC (ORCPT ); Mon, 10 Sep 2018 14:30:02 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:39296 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727970AbeIJSaC (ORCPT ); Mon, 10 Sep 2018 14:30:02 -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=88FOgxFtd7WX6v/k8eTG2EJvBzWVTb+VfX4xJEyDWH0=; b=a6SSzBUD4YrGZF1sWltotR9e+ di93GZIDWeemTCE5GknD2+KDHUuTuTPOLv62JbC47mGsCx1W4035rwX6dBNgk2sIjBiJr7baXXOYg s8/fR6jNgpDjbm6bfPaCywXPq2XnLRC9StBQuevF8NVJ/Cz5Kz4sZl33o0rITO2Q1npegZ+n4DNui LMl7kUsYdHV3XBIGFWoI0ORUX1SLKuTVj7jJww5Mz0E9fl2rnvl3L3EK2qwj8keQHCcufAbsnPabr 8FkymMqLvZfHQ/9OivCz0tGY3ioxgtJPDwvOesRfeElX0bNJc8v6zUwBMZRFSV7ceEcX5oG/Clpis eZwsIVAMg==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1fzMM1-0005Ud-PQ; Mon, 10 Sep 2018 13:35:49 +0000 Date: Mon, 10 Sep 2018 06:35:49 -0700 From: Christoph Hellwig To: Anup Patel Cc: Christoph Hellwig , Daniel Lezcano , Jason Cooper , Marc Zyngier , Palmer Dabbelt , "linux-kernel@vger.kernel.org List" , Atish Patra , Albert Ou , Palmer Dabbelt , Thomas Gleixner , linux-riscv@lists.infradead.org Subject: Re: [RFC PATCH 4/5] irqchip: RISC-V Local Interrupt Controller Driver Message-ID: <20180910133549.GA15730@infradead.org> References: <20180904124514.6290-1-anup@brainfault.org> <20180904124514.6290-5-anup@brainfault.org> <20180904185755.GD25119@infradead.org> <20180905185838.GC15741@infradead.org> 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 Thu, Sep 06, 2018 at 05:23:07PM +0530, Anup Patel wrote: > > And we reject that driver approach for good reason and are now > > doing the architectualy low-level irq handling in common code > > without any need whatsover to duplicate information in the > > privileged spec in DT. > > In other words, the whole idea of separate RISCV local interrupt > controller driver was dropped due duplicate information in privilege > spec DT ?? No. We came to the conflusion that a few registers on a cpu that allow enabling/disabling local vs external vs timer intterupts aren't worth writing an irqchip (or DT entries) for.