Include the psind in data returned by mincore(2).

Currently we use a single bit to indicate whether the virtual page is
part of a superpage.  To support a forthcoming implementation of
non-transparent 1GB superpages, it is useful to provide more detailed
information about large page sizes.

The change converts MINCORE_SUPER into a mask for MINCORE_PSIND(psind)
values, indicating a mapping of size psind, where psind is an index into
the pagesizes array returned by getpagesizes(3), which in turn comes
from the hw.pagesizes sysctl.  MINCORE_PSIND(1) is equal to the old
value of MINCORE_SUPER.

For now, two bits are used to record the page size, permitting values
of MAXPAGESIZES up to 4.

Reviewed by:	alc, kib
Sponsored by:	Juniper Networks, Inc.
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D26238

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/powerpc/aim/mmu_radix.c b/sys/powerpc/aim/mmu_radix.c
index e2deb68705c2..608d17e1a556 100644
--- a/sys/powerpc/aim/mmu_radix.c
+++ b/sys/powerpc/aim/mmu_radix.c
@@ -5689,7 +5689,7 @@ mmu_radix_mincore(pmap_t pmap, vm_offset_t addr, vm_paddr_t *locked_pa)
 			/* Compute the physical address of the 4KB page. */
 			pa = ((*l3ep & PG_PS_FRAME) | (addr & L3_PAGE_MASK)) &
 			    PG_FRAME;
-			val = MINCORE_SUPER;
+			val = MINCORE_PSIND(1);
 		} else {
 			pte = *pmap_l3e_to_pte(l3ep, addr);
 			pa = pte & PG_FRAME;