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fa4e4d55b3
--Eliminate a big ifdef that encompassed all currently-supported
architectures except mips and powerpc32. This applied to the case
in which we've allocated a superpage but the pager-populated range
is insufficient for a superpage mapping. For platforms that don't
support superpages the check should be inexpensive as we shouldn't
get a superpage in the first place. Make the normal-page fallback
logic identical for all platforms and provide a simple implementation
of pmap_ps_enabled() for MIPS and Book-E/AIM32 powerpc.
--Apply the logic for handling pmap_enter() failure if a superpage
mapping can't be supported due to additional protection policy.
Use KERN_PROTECTION_FAILURE instead of KERN_FAILURE for this case,
and note Intel PKU on amd64 as the first example of such protection
policy.
Reviewed by: kib, markj, bdragon
(cherry picked from commit
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| amigaone | ||
| booke | ||
| conf | ||
| cpufreq | ||
| fpu | ||
| include | ||
| mambo | ||
| mikrotik | ||
| mpc85xx | ||
| ofw | ||
| powermac | ||
| powernv | ||
| powerpc | ||
| ps3 | ||
| pseries | ||
| psim | ||