Re: [PATCH] Use WARN_ON_ONCE for missing X86_FEATURE_NRIPS

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On Mon, Oct 05, 2015 at 12:54:43PM -0400, Bandan Das wrote:
> Joerg Roedel <joro@xxxxxxxxxx> writes:
> The problems is that the next_rip field could be stale. If the processor supports
> next_rip, then it will clear it out on the next entry. If it doesn't,
> an old value just sits there (no matter who wrote it) and the problem
> happens when skip_emulated_instruction advances the rip with an incorrect
> value.

So the right fix would be to just set the guests next_rip to 0 when we
emulate vmrun, just like real hardware does, no?


	Joerg

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