diff options
| -rw-r--r-- | sys/arm64/arm64/pmap.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c index 37b9480..abc6581 100644 --- a/sys/arm64/arm64/pmap.c +++ b/sys/arm64/arm64/pmap.c @@ -3074,7 +3074,11 @@ retry: l1p = pmap_l1(pmap, addr); if (l1p == NULL) /* No l1 */ goto done; + l1 = pmap_load(l1p); + if ((l1 & ATTR_DESCR_MASK) == L1_INVAL) + goto done; + if ((l1 & ATTR_DESCR_MASK) == L1_BLOCK) { pa = (l1 & ~ATTR_MASK) | (addr & L1_OFFSET); managed = (l1 & ATTR_SW_MANAGED) == ATTR_SW_MANAGED; @@ -3089,7 +3093,11 @@ retry: l2p = pmap_l1_to_l2(l1p, addr); if (l2p == NULL) /* No l2 */ goto done; + l2 = pmap_load(l2p); + if ((l2 & ATTR_DESCR_MASK) == L2_INVAL) + goto done; + if ((l2 & ATTR_DESCR_MASK) == L2_BLOCK) { pa = (l2 & ~ATTR_MASK) | (addr & L2_OFFSET); managed = (l2 & ATTR_SW_MANAGED) == ATTR_SW_MANAGED; @@ -3104,7 +3112,11 @@ retry: l3p = pmap_l2_to_l3(l2p, addr); if (l3p == NULL) /* No l3 */ goto done; + l3 = pmap_load(l2p); + if ((l3 & ATTR_DESCR_MASK) == L3_INVAL) + goto done; + if ((l3 & ATTR_DESCR_MASK) == L3_PAGE) { pa = (l3 & ~ATTR_MASK) | (addr & L3_OFFSET); managed = (l3 & ATTR_SW_MANAGED) == ATTR_SW_MANAGED; |
