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| author | Juergen Gross <[email protected]> | 2017-10-27 17:49:37 +0000 |
|---|---|---|
| committer | Boris Ostrovsky <[email protected]> | 2017-10-31 13:06:48 +0000 |
| commit | 6f0e8bf16730a36ff6773802d8c8df56d10e60cd (patch) | |
| tree | 331fcc02308d71fb979e421a0d4c9508f1cc5e0c /drivers/xen/manage.c | |
| parent | xen: introduce a Kconfig option to enable the pvcalls frontend (diff) | |
| download | kernel-6f0e8bf16730a36ff6773802d8c8df56d10e60cd.tar.gz kernel-6f0e8bf16730a36ff6773802d8c8df56d10e60cd.zip | |
xen: support 52 bit physical addresses in pv guests
Physical addresses on processors supporting 5 level paging can be up to
52 bits wide. For a Xen pv guest running on such a machine those
physical addresses have to be supported in order to be able to use any
memory on the machine even if the guest itself does not support 5 level
paging.
So when reading/writing a MFN from/to a pte don't use the kernel's
PTE_PFN_MASK but a new XEN_PTE_MFN_MASK allowing full 40 bit wide MFNs.
Signed-off-by: Juergen Gross <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
Signed-off-by: Boris Ostrovsky <[email protected]>
Diffstat (limited to 'drivers/xen/manage.c')
0 files changed, 0 insertions, 0 deletions