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Re: CPUID module

From: Robert Millan
Subject: Re: CPUID module
Date: Sat, 19 May 2007 12:55:35 +0200
User-agent: Mutt/1.5.13 (2006-08-11)

On Fri, May 18, 2007 at 08:35:35PM +0200, Yoshinori K. Okuji wrote:
> > This module checks for CPU features 
> > (currently only the long_mode flag, but more could be added if needed)
> > using cpuid.  The idea behind this is that grub.cfg scripts can use it to
> > decide wether a 64-bit or 32-bit Linux image should be boot (e.g. like
> > Debian multiarch CDs do).  I haven't investigated what the syntax for that
> > hack would be, although I assume it's possible.
> Personally, I think it would be cleaner to just return true or false (like 
> test) rather than setting an environment variable. For instance:


> if cpuid --long-mode; then ...; else ...; fi

The return value ($?) is set, but this syntax doesn't work.  How can this
functionality be tested?

> No. Please use commands/i386/. "util" is strictly for utilities for an host 
> operating system.


Please have a look at the new patch.

2007-05-19  Robert Millan  <address@hidden>

        * commands/i386/cpuid.c: New module.
        * DISTLIST: Add it.
        * conf/i386-efi.rmk: Enable cpuid.mod.
        * conf/i386-pc.rmk: Likewise.

Robert Millan

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