Shaohe Feng e7cb9c4e23 cpu: Add support for al57 Intel features
We can start qemu with a "cpu,+la57" to set 57-bit vitrual address
space. So VM can be aware that it need to enable 5-level paging.

Corresponding QEMU commits:
        al57 6c7c3c21f95dd9af8a0691c0dd29b07247984122
2018-01-25 15:30:32 +01:00
..
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