Author: nwhitehorn
Date: Sat Dec 11 20:29:52 2010
New Revision: 216383
URL: http://svn.freebsd.org/changeset/base/216383
Log:
Add some isync()s related to the 64-bit MMU scratch page to avoid race
conditions on its invalidation.
Modified:
head/sys/powerpc/aim/mmu_oea64.c
head/sys/powerpc/aim/moea64_native.c
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Sat Dec 11 20:12:42 2010
(r216382)
+++ head/sys/powerpc/aim/mmu_oea64.c Sat Dec 11 20:29:52 2010
(r216383)
@@ -1114,6 +1114,7 @@ void moea64_set_scratchpage_pa(mmu_t mmu
MOEA64_PTE_CHANGE(mmup, moea64_scratchpage_pte[which],
&moea64_scratchpage_pvo[which]->pvo_pte.lpte,
moea64_scratchpage_pvo[which]->pvo_vpn);
+ isync();
}
void
Modified: head/sys/powerpc/aim/moea64_native.c
==============================================================================
--- head/sys/powerpc/aim/moea64_native.c Sat Dec 11 20:12:42 2010
(r216382)
+++ head/sys/powerpc/aim/moea64_native.c Sat Dec 11 20:29:52 2010
(r216383)
@@ -292,6 +292,9 @@ moea64_pte_unset_native(mmu_t mmu, uintp
pvo_pt->pte_hi &= ~LPTE_VALID;
+ /* Finish all pending operations */
+ isync();
+
/*
* Force the reg & chg bits back into the PTEs.
*/
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