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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