Re: [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores

[Bart Hartgers <bart@etpmod.phys.tue.nl>]

Rafał Bilski wrote:
> I'm using this for L2 cache:
> 	preempt_disable();
> 	local_irq_save(flags);
> 	rdmsr(MSR_VIA_FCR, lo, hi);
> 	flush_cache_all();
> 	wrmsr(MSR_VIA_FCR, lo | 1 << 8, hi);
> and this doesn't stop the processor, but when I'm adding
> 1 << 13 or 1 << 14 CPU stops. I have tried
> 	flush_cache_all();
> 	wrmsr(MSR_VIA_FCR, lo | 1 << 8, hi);
> 	flush_cache_all();
> 	wrmsr(MSR_VIA_FCR, lo | 1 << 8 | 1 << 13, hi);
> and
> 	flush_cache_all();
> 	wrmsr(MSR_VIA_FCR, lo | 1 << 8 | 1 << 13, hi);
> and more, but result was always the same.
> 
> I will be very gratefull if You tell me what I'm doing wrong.
> 
> Rafał

Sorry, I have no idea. The code looks fine.


-- 
Bart Hartgers - TUE Eindhoven - http://plasimo.phys.tue.nl/bart/contact/
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