Some guests seem to try source copy blits with same source and dest
which are no-op so avoid calling pixman for these.
Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
hw/display/sm501.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/display/sm501.c b/hw/display/sm501.c
index 85d54b598f..3397ca9fbf 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -788,6 +788,11 @@ static void sm501_2d_operation(SM501State *s)
(rop2_source_is_pattern ?
" with pattern source" : ""));
}
+ /* Ignore no-op blits, some guests seem to do this */
+ if (src_base == dst_base && src_pitch == dst_pitch &&
+ src_x == dst_x && src_y == dst_y) {
+ break;
+ }
/* Check for overlaps, this could be made more exact */
uint32_t sb, se, db, de;
sb = src_base + src_x + src_y * (width + src_pitch);
--
2.21.3
