Re: [PATCH] x86/paravirt: Remove 'noreplace-paravirt' cmdline option

[Juergen Gross]

On 31/01/18 05:13, Josh Poimboeuf wrote:
> The 'noreplace-paravirt' option disables paravirt patching, leaving the
> original pv indirect calls in place.
> 
> That's highly incompatible with retpolines, unless we want to uglify
> paravirt even further and convert the paravirt calls to retpolines.
> 
> As far as I can tell, the option doesn't seem to be useful for much
> other than introducing surprising corner cases and making the kernel
> vulnerable to Spectre v2.  It was probably a debug option from the early
> paravirt days.  So just remove it.
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>

Reviewed-by: Juergen Gross <jgross@xxxxxxxx>


Juergen