Re: [Xen-devel] [PATCH 1/2] x86/ept: defer enabling of EPT A/D bit until PML get enabled.

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 20/10/15 03:34, Kai Huang wrote:
> Existing PML implementation turns on EPT A/D bit unconditionally if PML is
> supported by hardware. This works but enabling of EPT A/D bit can be deferred
> until PML get enabled. There's no point in enabling the extra feature for 
> every
> domain when we're not meaning to use it (yet).
>
> Also added ASSERT of domain having been paused to ept_flush_pml_buffers to 
> make
> it consistent with ept_enable{disable}_pml.
>
> Sanity live migration and GUI display were tested on Broadwell Machine.
>
> Signed-off-by: Kai Huang <kai.huang@xxxxxxxxxxxxxxx>
> Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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