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If the PDE is known, then use the direct mapping instead of the recursive

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mapping to access the PTE.
This commit is contained in:
Alan Cox 2009-03-06 17:40:58 +00:00
parent d1864afbac
commit 767a6e258b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=189454
1 changed files with 5 additions and 3 deletions
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8
sys/amd64/amd64/pmap.c
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@ -3801,7 +3801,9 @@ pmap_remove_pages(pmap_t pmap)
if ((tpte & PG_PS) != 0) if ((tpte & PG_PS) != 0)
pte = pde; pte = pde;
else { else {
pte = vtopte(pv->pv_va); pte = (pt_entry_t *)PHYS_TO_DMAP(tpte &
PG_FRAME);
pte = &pte[pmap_pte_index(pv->pv_va)];
tpte = *pte & ~PG_PTE_PAT; tpte = *pte & ~PG_PTE_PAT;
} }
@ -4494,7 +4496,7 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size, int mode)
if (!pmap_demote_pde(kernel_pmap, pde, tmpva)) if (!pmap_demote_pde(kernel_pmap, pde, tmpva))
return (ENOMEM); return (ENOMEM);
} }
pte = vtopte(tmpva); pte = pmap_pde_to_pte(pde, tmpva);
if (*pte == 0) if (*pte == 0)
return (EINVAL); return (EINVAL);
tmpva += PAGE_SIZE; tmpva += PAGE_SIZE;
@ -4570,7 +4572,7 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size, int mode)
} else { } else {
if (cache_bits_pte < 0) if (cache_bits_pte < 0)
cache_bits_pte = pmap_cache_bits(mode, 0); cache_bits_pte = pmap_cache_bits(mode, 0);
pte = vtopte(tmpva); pte = pmap_pde_to_pte(pde, tmpva);
if ((*pte & PG_PTE_CACHE) != cache_bits_pte) { if ((*pte & PG_PTE_CACHE) != cache_bits_pte) {
pmap_pte_attr(pte, cache_bits_pte); pmap_pte_attr(pte, cache_bits_pte);
if (!changed) if (!changed)