Changes in kernel/arch/sparc64/src/mm/sun4v/tlb.c [1dbc43f:9aed144] in mainline

File:

• kernel/arch/sparc64/src/mm/sun4v/tlb.c (modified) (6 diffs)

kernel/arch/sparc64/src/mm/sun4v/tlb.c

@@ -62 +62 @@
 static void itlb_pte_copy(pte_t *);
 static void dtlb_pte_copy(pte_t *, bool);
+static void do_fast_instruction_access_mmu_miss_fault(istate_t *, uintptr_t,
+    const char *);
+static void do_fast_data_access_mmu_miss_fault(istate_t *, uint64_t,
+    const char *);
+static void do_fast_data_access_protection_fault(istate_t *,
+    uint64_t, const char *);
 
 /*
@@ -229 +235 @@
                  * handler.
                  */
-                as_page_fault(va, PF_ACCESS_EXEC, istate);
+                if (as_page_fault(va, PF_ACCESS_EXEC, istate) == AS_PF_FAULT) {
+                        do_fast_instruction_access_mmu_miss_fault(istate,
+                            istate->tpc, __func__);
+                }
         }
 }
@@ -255 +264 @@
                 if (va == 0) {
                         /* NULL access in kernel */
-                        panic("NULL pointer dereference.");
+                        do_fast_data_access_mmu_miss_fault(istate, page_and_ctx,
+                            __func__);
                 }
-                panic("Unexpected kernel page fault.");
+                do_fast_data_access_mmu_miss_fault(istate, page_and_ctx, "Unexpected "
+                    "kernel page fault.");
         }
 
@@ -276 +287 @@
                  * handler.
                  */             
-                as_page_fault(va, PF_ACCESS_READ, istate);
+                if (as_page_fault(va, PF_ACCESS_READ, istate) == AS_PF_FAULT) {
+                        do_fast_data_access_mmu_miss_fault(istate, page_and_ctx,
+                            __func__);
+                }
         }
 }
@@ -315 +329 @@
                  * handler.
                  */             
-                as_page_fault(va, PF_ACCESS_WRITE, istate);
+                if (as_page_fault(va, PF_ACCESS_WRITE, istate) == AS_PF_FAULT) {
+                        do_fast_data_access_protection_fault(istate, page_and_ctx,
+                            __func__);
+                }
         }
 }
@@ -329 +346 @@
 }
 
+void do_fast_instruction_access_mmu_miss_fault(istate_t *istate, uintptr_t va,
+    const char *str)
+{
+        fault_if_from_uspace(istate, "%s, address=%p.", str,
+            (void *) va);
+        panic_memtrap(istate, PF_ACCESS_EXEC, va, str);
+}
+
+void do_fast_data_access_mmu_miss_fault(istate_t *istate,
+    uint64_t page_and_ctx, const char *str)
+{
+        fault_if_from_uspace(istate, "%s, page=%p (asid=%" PRId64 ").", str,
+            (void *) DMISS_ADDRESS(page_and_ctx), DMISS_CONTEXT(page_and_ctx));
+        panic_memtrap(istate, PF_ACCESS_UNKNOWN, DMISS_ADDRESS(page_and_ctx),
+            str);
+}
+
+void do_fast_data_access_protection_fault(istate_t *istate,
+    uint64_t page_and_ctx, const char *str)
+{
+        fault_if_from_uspace(istate, "%s, page=%p (asid=%" PRId64 ").", str,
+            (void *) DMISS_ADDRESS(page_and_ctx), DMISS_CONTEXT(page_and_ctx));
+        panic_memtrap(istate, PF_ACCESS_WRITE, DMISS_ADDRESS(page_and_ctx),
+            str);
+}
+
 /**
  * Describes the exact condition which caused the last DMMU fault.