Re: [rfc 4.16-rt patch] arm64: efi,fpsimd: use a local_lock() in efi_virtmap_load()

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On 2018-07-11 17:07:22 [+0200], Mike Galbraith wrote:
> Greetings,
> 
> With the patch below, there's still one neon splat to figure out what
> to do with should this patch not die a gruesome death.  Cavium box
> boots and seemingly works fine modulo kvm, which is utterly deadly in
> 4.16-rt due to..
> 
> 972             if (!vgic_initialized(vcpu->kvm))
> 973                     return false;
> 974
> 975             irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
> 976             spin_lock_irqsave(&irq->irq_lock, flags);
> 
> ..that lock apparently having wandered into a minefield post v4.14.
> 
> Remaining neon splat:

I don't have this with preempt-disable patch for kernel_neon_begin()
(posted seconds ago).

Sebastian
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