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amd64 pmap.h: make it easier to use the header for other consumers

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Guard pmap_invlpg() definition with checks that only provide it when
both sys/pcpu.h and machine/cpufunc.h were already included.

Requested by:	Elliott Mitchell
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2023-01-04 12:31:16 +02:00
parent a2c08eba43
commit ad97b9bbfc
1 changed files with 2 additions and 0 deletions
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2
sys/amd64/include/pmap.h
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@ -516,6 +516,7 @@ pmap_invalidate_cpu_mask(pmap_t pmap)
return (&pmap->pm_active);
}
#if defined(_SYS_PCPU_H_) && defined(_MACHINE_CPUFUNC_H_)
/*
* It seems that AlderLake+ small cores have some microarchitectural
* bug, which results in the INVLPG instruction failing to flush all
@ -533,6 +534,7 @@ pmap_invlpg(pmap_t pmap, vm_offset_t va)
invlpg(va);
}
}
#endif /* sys/pcpu.h && machine/cpufunc.h */
#endif /* _KERNEL */