Re: [PATCH] x86/retpoline: Also fill return buffer after idle

From: David Woodhouse
Date: Mon Jan 08 2018 - 19:29:36 EST


On Mon, 2018-01-08 at 16:24 -0800, Andi Kleen wrote:
> > Probably doesn't matter right there but it's going to end up being used
> > elsewhere with IBRS/IBPB, and the compiler is going to think it needs
> > to save all the call-clobbered registers for that. Do we want to make
> > it use inline asm instead?
>
> You mean KVM?
>
> All the other places have lots of other calls too, so the registers are likelyÂ
> already clobbered.

Fair enough.

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