Re: [PATCH v4 7/7] x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support

[Borislav Petkov]

On Thu, Jan 25, 2018 at 11:47:35AM +0000, David Woodhouse wrote:
> I did already do the explicit clobbers now you reminded me how to do
> them, but I elected not to use ASM_NO_INPUT_CLOBBER() because on
> balance, losing the MSR_IA32_PRED_CMD / PRED_CMD_IBPB definitions and
> having to hard-code the numbers was not so much of a win.

and I'm thinking exactly the opposite: if an alternative can lose a
bunch of inputs which don't change, then that's a good thing.

-- 
Regards/Gruss,
    Boris.

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