[Qemu-devel] [PATCH v4 01/16] memory: Allow subregions to not be printed by info mtree

[Alistair Francis <alistair.francis@xilinx.com>]

Add a function called memory_region_add_subregion_no_print() that
creates memory subregions that won't be printed when running
the 'info mtree' command.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: KONRAD Frederic <fred.konrad@greensocs.com>
---

 include/exec/memory.h | 17 +++++++++++++++++
 memory.c              | 10 +++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index c92734a..25353df 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -186,6 +186,7 @@ struct MemoryRegion {
     bool skip_dump;
     bool enabled;
     bool warning_printed; /* For reservations */
+    bool do_not_print;
     uint8_t vga_logging_count;
     MemoryRegion *alias;
     hwaddr alias_offset;
@@ -954,6 +955,22 @@ void memory_region_del_eventfd(MemoryRegion *mr,
 void memory_region_add_subregion(MemoryRegion *mr,
                                  hwaddr offset,
                                  MemoryRegion *subregion);
+
+/**
+ * memory_region_add_subregion_no_print: Add a subregion to a container.
+ *
+ * The same functionality as memory_region_add_subregion except that any
+ * memory regions added by this function are not printed by 'info mtree'.
+ *
+ * @mr: the region to contain the new subregion; must be a container
+ *      initialized with memory_region_init().
+ * @offset: the offset relative to @mr where @subregion is added.
+ * @subregion: the subregion to be added.
+ */
+void memory_region_add_subregion_no_print(MemoryRegion *mr,
+                                          hwaddr offset,
+                                          MemoryRegion *subregion);
+
 /**
  * memory_region_add_subregion_overlap: Add a subregion to a container
  *                                      with overlap.
diff --git a/memory.c b/memory.c
index 09041ed..228a8a7 100644
--- a/memory.c
+++ b/memory.c
@@ -1829,6 +1829,14 @@ void memory_region_add_subregion(MemoryRegion *mr,
     memory_region_add_subregion_common(mr, offset, subregion);
 }
 
+void memory_region_add_subregion_no_print(MemoryRegion *mr,
+                                          hwaddr offset,
+                                          MemoryRegion *subregion)
+{
+    memory_region_add_subregion(mr, offset, subregion);
+    subregion->do_not_print = true;
+}
+
 void memory_region_add_subregion_overlap(MemoryRegion *mr,
                                          hwaddr offset,
                                          MemoryRegion *subregion,
@@ -2219,7 +2227,7 @@ static void mtree_print_mr(fprintf_function mon_printf, void *f,
     const MemoryRegion *submr;
     unsigned int i;
 
-    if (!mr) {
+    if (!mr || mr->do_not_print) {
         return;
     }
 
-- 
2.5.0