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Assert that page table traversal functions don't operate on superpages.

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Reviewed by:	kib
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D24828
This commit is contained in:
markj 2020-05-14 15:49:37 +00:00
parent 1248f0885b
commit 1c610e1dd6
1 changed files with 4 additions and 0 deletions
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4
sys/amd64/amd64/pmap.c
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@ -1317,6 +1317,8 @@ pmap_pdpe_to_pde(pdp_entry_t *pdpe, vm_offset_t va)
{
pd_entry_t *pde;
KASSERT((*pdpe & PG_PS) == 0,
("%s: pdpe %#lx is a leaf", __func__, *pdpe));
pde = (pd_entry_t *)PHYS_TO_DMAP(*pdpe & PG_FRAME);
return (&pde[pmap_pde_index(va)]);
}
@ -1341,6 +1343,8 @@ pmap_pde_to_pte(pd_entry_t *pde, vm_offset_t va)
{
pt_entry_t *pte;
KASSERT((*pde & PG_PS) == 0,
("%s: pde %#lx is a leaf", __func__, *pde));
pte = (pt_entry_t *)PHYS_TO_DMAP(*pde & PG_FRAME);
return (&pte[pmap_pte_index(va)]);
}