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

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

Remove unecessary isb() and document the ones left.

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Andrii Anisov <andrii_anisov@xxxxxxxx>

Andrii Anisov.

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