1 files changed, 42 insertions, 0 deletions
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 521aa8b61e..fb7d6ee9e9 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -210,6 +210,48 @@ tb_page_addr_t get_page_addr_code_hostp(CPUArchState *env, target_ulong addr,
     return addr;
 }
 
+void page_reset_target_data(target_ulong start, target_ulong end)
+{
+#ifdef TARGET_PAGE_DATA_SIZE
+    target_ulong addr, len;
+
+    /*
+     * This function should never be called with addresses outside the
+     * guest address space.  If this assert fires, it probably indicates
+     * a missing call to h2g_valid.
+     */
+    assert(end - 1 <= GUEST_ADDR_MAX);
+    assert(start < end);
+    assert_memory_lock();
+
+    start = start & TARGET_PAGE_MASK;
+    end = TARGET_PAGE_ALIGN(end);
+
+    for (addr = start, len = end - start;
+         len != 0;
+         len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
+        PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
+
+        g_free(p->target_data);
+        p->target_data = NULL;
+    }
+#endif
+}
+
+#ifdef TARGET_PAGE_DATA_SIZE
+void *page_get_target_data(target_ulong address)
+{
+    PageDesc *p = page_find(address >> TARGET_PAGE_BITS);
+    void *ret = p->target_data;
+
+    if (!ret) {
+        ret = g_malloc0(TARGET_PAGE_DATA_SIZE);
+        p->target_data = ret;
+    }
+    return ret;
+}
+#endif
+
 /* The softmmu versions of these helpers are in cputlb.c.  */
 
 /*