Re: [PATCH] libxg: don't use max policy in xc_cpuid_xend_policy()

[Wei Liu <wl@xxxxxxx>]

On Thu, Nov 05, 2020 at 04:56:53PM +0100, Jan Beulich wrote:
> Using max undermines the separation between default and max. For example,
> turning off AVX512F on an MPX-capable system silently turns on MPX,
> despite this not being part of the default policy anymore. Since the
> information is used only for determining what to convert 'x' to (but not
> to e.g. validate '1' settings), the effect of this change is identical
> for guests with (suitable) "cpuid=" settings to that of the changes
> separating default from max and then converting (e.g.) MPX from being
> part of default to only being part of max for guests without (affected)
> "cpuid=" settings.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

I will defer this to Andrew.