On 22.06.2017 15:34, Christian Borntraeger wrote:
> From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
>
> For real-space designation asces the asce origin part is only a token.
> The asce token origin must not be used to generate an effective
> address for storage references. This however is erroneously done
> within kvm_s390_shadow_tables().
>
> Furthermore within the same function the wrong parts of virtual
> addresses are used to generate a corresponding real address
> (e.g. the region second index is used as region first index).
>
> Both of the above can result in incorrect address translations. Only
> for real space designations with a token origin of zero and addresses
> below one megabyte the translation was correct.
>
> Furthermore replace a "!asce.r" statement with a "!*fake" statement to
> make it more obvious that a specific condition has nothing to do with
> the architecture, but with the fake handling of real space designations.
>
> Fixes: 3218f7094b6b ("s390/mm: support real-space for gmap shadows")
> Cc: David Hildenbrand <david@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
> Reviewed-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
--
Thanks,
David
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