Re: [PATCH] deal with interrupt shadow state for emulated instruction

[Avi Kivity]

H. Peter Anvin wrote:
> Avi Kivity wrote:
> > We don't emulate guest user mode.
> >
> > Well, if guest userspace can convince its kernel to give it access to 
> > some memory mapped I/O register, I guess it can execute repeated 'mov 
> > ss, mmio' and starve the guest kernel.
>
> It doesn't need a MMIO register to do that, even.

Can you explain how?

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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