Author: jhibbits
Date: Fri Dec 8 03:49:53 2017
New Revision: 326675
URL: https://svnweb.freebsd.org/changeset/base/326675
Log:
Remove PTE VA mappings for tracked pages in 64-bit mode
This was done in 32-bit mode, but not duplicated when 64-bit mode was
brought in. Without this, stale mappings can be left, leading to odd
crashes when the wrong VA is checked in XX_PhysToVirt() (dpaa(4)).
Modified:
head/sys/powerpc/booke/pmap.c
Modified: head/sys/powerpc/booke/pmap.c
==============================================================================
--- head/sys/powerpc/booke/pmap.c Fri Dec 8 00:57:13 2017
(r326674)
+++ head/sys/powerpc/booke/pmap.c Fri Dec 8 03:49:53 2017
(r326675)
@@ -1291,6 +1291,10 @@ pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, u_i
/* Remove pv_entry from pv_list. */
pv_remove(pmap, va, m);
+ } else if (m->md.pv_tracked) {
+ pv_remove(pmap, va, m);
+ if (TAILQ_EMPTY(&m->md.pv_list))
+ m->md.pv_tracked = false;
}
mtx_lock_spin(&tlbivax_mutex);
tlb_miss_lock();
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