* Re: [MIPS] Enable support for the userlocal hardware register
[not found] <S20023433AbXGIOIU/20070709140820Z+13176@ftp.linux-mips.org>
@ 2007-07-12 15:37 ` Atsushi Nemoto
2007-07-13 17:59 ` Ralf Baechle
0 siblings, 1 reply; 2+ messages in thread
From: Atsushi Nemoto @ 2007-07-12 15:37 UTC (permalink / raw)
To: linux-mips; +Cc: ralf
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
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [MIPS] Enable support for the userlocal hardware register
2007-07-12 15:37 ` [MIPS] Enable support for the userlocal hardware register Atsushi Nemoto
@ 2007-07-13 17:59 ` Ralf Baechle
0 siblings, 0 replies; 2+ messages in thread
From: Ralf Baechle @ 2007-07-13 17:59 UTC (permalink / raw)
To: Atsushi Nemoto; +Cc: 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
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <S20023433AbXGIOIU/20070709140820Z+13176@ftp.linux-mips.org>
2007-07-12 15:37 ` [MIPS] Enable support for the userlocal hardware register Atsushi Nemoto
2007-07-13 17:59 ` Ralf Baechle
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