Re: [Xen-devel] [PATCH for-4.12 5/8] xen/arm: p2m: Only use isb() when it is necessary

[Andrii Anisov <andrii.anisov@xxxxxxxxx>]

On 28.11.18 18:49, Julien Grall wrote:
> The EL1 translation regime is out-of-context when running at EL2. This
> means the processor cannot speculate memory accesses using the registers
> associated to that regime.
>
> An isb() is only need if Xen is going to use the translation regime
> before returning to the guest (exception returns will synchronized the
> context).
>
> Remove unecessary isb() and document the ones left.
>
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Andrii Anisov <andrii_anisov@xxxxxxxx>

--
Sincerely,
Andrii Anisov.

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