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From: Roland McGrath <roland@redhat.com>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: how to check for "optional" ppc chip features (MSR_BE)
Date: Tue, 13 May 2008 12:33:50 -0700 (PDT)	[thread overview]
Message-ID: <20080513193350.8B90C26F8D4@magilla.localdomain> (raw)
In-Reply-To: Paul Mackerras's message of  Tuesday, 13 May 2008 21:55:22 +1000 <18473.33194.781010.826872@cargo.ozlabs.ibm.com>

> So it looks like we need to define a new feature bit to mean "supports
> block-step".  Is this something that userspace will expect to be told
> about via the AT_HWCAP entry in the aux vector?

I don't care to have userland know about it.  I'm just concerned with the
arch_has_block_step() definition being right.  But, you did previously tell
me that userland can set its own MSR_SE via sigreturn or setcontext or
something.  If it can set its own MSR_BE the same way, then perhaps
userland wants to know.


Thanks,
Roland

  parent reply	other threads:[~2008-05-13 19:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-02  1:21 how to check for "optional" ppc chip features (MSR_BE) Roland McGrath
2008-05-02  3:48 ` Kumar Gala
2008-05-04 21:45   ` Benjamin Herrenschmidt
2008-05-04 23:12     ` Roland McGrath
2008-05-05  0:49       ` Benjamin Herrenschmidt
2008-05-13 11:55       ` Paul Mackerras
2008-05-13 13:47         ` Kumar Gala
2008-05-13 19:33         ` Roland McGrath [this message]
2008-06-11 16:05           ` Kumar Gala

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