Re: [PATCH] Fix i486 suspend to disk CR4 oops

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From: Andi Kleen

Subject: Re: [PATCH] Fix i486 suspend to disk CR4 oops

Date: Sunday, August 17, 2008 - 11:42 pm

On Sun, Aug 17, 2008 at 11:34:50PM -0700, H. Peter Anvin wrote:
quoted text> Andi Kleen wrote:
> >>>
> >>The other alternative is to probe for the CPUID instruction (via
> >>EFLAGS.ID) -- CR4 is present if and only if CPUID exists.
> >
> >Can be already checked for with boot_cpu_data.extended_cpuid_level.
> >
> 
> I believe you mean just plain cpuid_level (which is set to -1 if CPUID 
> doesn't exist.)  extended_cpuid_level is only defined on x86-64, but all 
> x86-64 CPUs have CR4.

Yes I meant plain cpuid_level. Just wanted to mention that before someone
opencodes another cpuid test.

-Andi
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Messages in current thread:

[PATCH] Fix i486 suspend to disk CR4 oops, David Fries, (Sun Aug 17, 9:03 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Maciej W. Rozycki, (Sun Aug 17, 9:14 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, H. Peter Anvin, (Sun Aug 17, 9:35 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Andi Kleen, (Sun Aug 17, 11:04 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, H. Peter Anvin, (Sun Aug 17, 11:34 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Ingo Molnar, (Sun Aug 17, 11:41 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Andi Kleen, (Sun Aug 17, 11:42 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, H. Peter Anvin, (Sun Aug 17, 11:45 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Pavel Machek, (Mon Aug 18, 2:15 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Rafael J. Wysocki, (Mon Aug 18, 3:16 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, David Fries, (Mon Aug 18, 5:58 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Ingo Molnar, (Mon Aug 18, 6:25 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Maciej W. Rozycki, (Mon Aug 18, 7:38 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Maciej W. Rozycki, (Mon Aug 18, 7:41 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Dave Jones, (Mon Aug 18, 8:24 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Lennart Sorensen, (Mon Aug 18, 9:04 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Dave Jones, (Mon Aug 18, 10:17 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, H. Peter Anvin, (Mon Aug 18, 10:32 am)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Pavel Machek, (Mon Aug 18, 3:02 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, Pavel Machek, (Mon Aug 18, 3:04 pm)

Re: [PATCH] Fix i486 suspend to disk CR4 oops, H. Peter Anvin, (Mon Aug 18, 3:10 pm)

Re: [PATCH] i486 CR4 oops, no_console_suspend, David Fries, (Mon Aug 18, 8:37 pm)

Re: [PATCH] i486 CR4 oops, no_console_suspend, Ingo Molnar, (Tue Aug 19, 2:34 am)

Re: [PATCH] i486 CR4 oops, no_console_suspend, H. Peter Anvin, (Tue Aug 19, 9:07 am)

Re: [PATCH] i486 CR4 oops, no_console_suspend, David Fries, (Wed Aug 20, 9:17 pm)

Re: [PATCH] i486 CR4 oops, no_console_suspend, H. Peter Anvin, (Wed Aug 20, 10:37 pm)


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