Re: [Xen-devel] [PATCH v4 18/19] xen/arm: Prevent slipping hypervisor SError to guest

[Julien Grall <julien.grall@xxxxxxx>]

Hi Wei,

On 05/04/17 10:09, Wei Chen wrote:
> If there is a pending SError while we're returning from trap. If the
> SError handle option is "DIVERSE", we have to prevent slipping this
> hypervisor SError to guest. So we have to use the dsb/isb to guarantee
> that the pending hypervisor SError would be caught in hypervisor before
> return to guest.
>
> In previous patch, we will set SKIP_SYNCHRONIZE_SERROR_ENTRY_EXIT to
> cpu_hwcaps when option is NOT "DIVERSE". This means we can use the
> alternative to skip synchronizing SErrors for other SErrors handle options.
>
> Because we have umasked the Abort/SError bit in previous patch. We have
> to disable the Abort/SError before returning to guest as we have done
> for IRQ.
>
> Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
Reviewed-by: Julien Grall <julien.grall@xxxxxxx>

Cheers,


--
Julien Grall

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