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Re: [MIPS] Enable support for the userlocal hardware register

To: linux-mips@linux-mips.org
Subject: Re: [MIPS] Enable support for the userlocal hardware register
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Fri, 13 Jul 2007 00:37:27 +0900 (JST)
Cc: ralf@linux-mips.org
In-reply-to: <S20023433AbXGIOIU/20070709140820Z+13176@ftp.linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <S20023433AbXGIOIU/20070709140820Z+13176@ftp.linux-mips.org>
Sender: linux-mips-bounce@linux-mips.org
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.

---
Atsushi Nemoto

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