[v3] hw: Sanitize various MemoryRegion calls

[PATCH v3 15/25] scripts/cocci: Patch to remove unnecessary memory_region_set_readonly()

Philippe Mathieu-Daudé posted 25 patches 5 years, 10 months ago

Diff against v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v1 v2 v2
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[PATCH v3 15/25] scripts/cocci: Patch to remove unnecessary memory_region_set_readonly()

Posted by Philippe Mathieu-Daudé 5 years, 10 months ago

Add a semantic patch to remove memory_region_set_readonly() calls
on ROM memory regions.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 .../coccinelle/memory-region-housekeeping.cocci   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/scripts/coccinelle/memory-region-housekeeping.cocci b/scripts/coccinelle/memory-region-housekeeping.cocci
index 9cdde71bb1..5e6b31d8ba 100644
--- a/scripts/coccinelle/memory-region-housekeeping.cocci
+++ b/scripts/coccinelle/memory-region-housekeeping.cocci
@@ -48,6 +48,21 @@ p << possible_memory_region_init_rom.p;
 cocci.print_main("potential use of memory_region_init_rom*() in ", p)
 
 
+// Do not call memory_region_set_readonly() on ROM alias
+@@
+expression ROM, E1, E2, E3, E4;
+expression ALIAS, E5, E6, E7, E8;
+@@
+(
+  memory_region_init_rom(ROM, E1, E2, E3, E4);
+|
+  memory_region_init_rom_nomigrate(ROM, E1, E2, E3, E4);
+)
+  ...
+   memory_region_init_alias(ALIAS, E5, E6, ROM, E7, E8);
+-  memory_region_set_readonly(ALIAS, true);
+
+
 // Replace by-hand memory_region_init_ram_nomigrate/vmstate_register_ram
 // code sequences with use of the new memory_region_init_ram function.
 // Similarly for the _rom and _rom_device functions.
-- 
2.21.1