On Oct 14, 2014 02:14, Benjamin Block wrote:
> I finally got it to work, well at least to get into the MLE, still 
> have to get back to Linux, but this will be the smaller part of the work.
> 
> Over the last days I had some really weired problems with the
> starting- process though. The CPU work execute the ACM-Sinit, but it 
> would fail with the error-code "0xC0000481" - that means "interrupt 
> occurred". I could fix this by starting linux with "intremap=off", 
> this turns interrupt-remapping and this in turn x2apic off. After that 
> my MLE would launch.
> 
> The thing is, I never read about this in the spec. The spec tells me 
> only that DMA remapping should off - which it was/is - neither irq- 
> remap, nor x2apic are mentioned. Additionally the SDM on SMX says that 
> before going to the ACM - I learned ;) - it turns off all interrupt- 
> sources (external and internal). Is this some new requirement that is 
> not yet in the spec or should this not happen, even with irq-rmapping 
> and x2apic? Maybe I'm also fixing around a completely different issue 
> by turning those off.

This is a known bug in HSW SINIT. Please try to use the coming BDW SINIT on 
your HSW system, which fixed this bug.

Thanks
Jimmy



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