Messages in this thread | | | Date | Mon, 29 Jun 2015 10:33:02 +0200 | From | Borislav Petkov <> | Subject | Re: [all better] Re: regression: massive trouble with fpu rework |
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On Mon, Jun 29, 2015 at 10:25:29AM +0200, Mike Galbraith wrote: > On Mon, 2015-06-29 at 08:40 +0200, Ingo Molnar wrote: > > * > > Ok, so could you please move the fpu__init_system() further up and see which > > position is that starts breaking with the BIOS option set? > > > > here's the current, broken layout of the code: > > > > get_cpu_cap(c); > > [0] fpu__init_system(c); > > > > if (this_cpu->c_early_init) > > this_cpu->c_early_init(c);
> [0] is the only spot that breaks box.
I bet it is that
/* Unmask CPUID levels if masked: */ if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { if (msr_clear_bit(MSR_IA32_MISC_ENABLE, MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT) > 0) { c->cpuid_level = cpuid_eax(0); get_cpu_cap(c); } }
in early_init_intel(). If you feel like playing, you might comment it out to see what happens.
:-)
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply. --
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