From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 16 Jul 2007 09:53:12 +0100 (BST) Received: from localhost.localdomain ([127.0.0.1]:14825 "EHLO dl5rb.ham-radio-op.net") by ftp.linux-mips.org with ESMTP id S20022680AbXGPIxK (ORCPT ); Mon, 16 Jul 2007 09:53:10 +0100 Received: from denk.linux-mips.net (denk.linux-mips.net [127.0.0.1]) by dl5rb.ham-radio-op.net (8.14.1/8.13.8) with ESMTP id l6G8r89S009550; Mon, 16 Jul 2007 09:53:09 +0100 Received: (from ralf@localhost) by denk.linux-mips.net (8.14.1/8.14.1/Submit) id l6DHxFXm030592; Fri, 13 Jul 2007 18:59:15 +0100 Date: Fri, 13 Jul 2007 18:59:15 +0100 From: Ralf Baechle To: Atsushi Nemoto Cc: linux-mips@linux-mips.org Subject: Re: [MIPS] Enable support for the userlocal hardware register Message-ID: <20070713175915.GA30076@linux-mips.org> References: <20070713.003727.08076834.anemo@mba.ocn.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070713.003727.08076834.anemo@mba.ocn.ne.jp> User-Agent: Mutt/1.5.14 (2007-02-12) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 15779 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Fri, Jul 13, 2007 at 12:37:27AM +0900, Atsushi Nemoto wrote: > On Mon, 09 Jul 2007 15:08:15 +0100, linux-mips@linux-mips.org wrote: > > Which will cut down the cost of RDHWR $29 which is used to obtain the > > TLS pointer and so far being emulated in software down to a single cycle > > operation. > > Since cpu_has_userlocal is used in a critical path (switch_to), > overriding in each cpu-feature-overrides.h might be expected. Every sper^Wcycle is holy, as Monthy Python would say. Ralf