[Qemu-devel] [PATCH 1/2] Move graphic-related coalesced MMIO flushes to affected device models

[Jan Kiszka <jan.kiszka@siemens.com>]

This is conceptually cleaner and will allow us to drop the nographic
timer. Moreover, it will be mandatory to fully exploit future per-device
coalesced MMIO rings.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hw/g364fb.c |    4 ++++
 hw/vga.c    |    4 ++++
 vl.c        |    2 --
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/hw/g364fb.c b/hw/g364fb.c
index b43341f..f00ee27 100644
--- a/hw/g364fb.c
+++ b/hw/g364fb.c
@@ -245,6 +245,8 @@ static void g364fb_update_display(void *opaque)
 {
     G364State *s = opaque;
 
+    qemu_flush_coalesced_mmio_buffer();
+
     if (s->width == 0 || s->height == 0)
         return;
 
@@ -297,6 +299,8 @@ static void g364fb_screen_dump(void *opaque, const char *filename)
     uint8_t *data_buffer;
     FILE *f;
 
+    qemu_flush_coalesced_mmio_buffer();
+
     if (s->depth != 8) {
         error_report("g364: unknown guest depth %d", s->depth);
         return;
diff --git a/hw/vga.c b/hw/vga.c
index f9a6014..8712269 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -1838,6 +1838,8 @@ static void vga_update_display(void *opaque)
     VGACommonState *s = opaque;
     int full_update, graphic_mode;
 
+    qemu_flush_coalesced_mmio_buffer();
+
     if (ds_get_bits_per_pixel(s->ds) == 0) {
         /* nothing to do */
     } else {
@@ -1958,6 +1960,8 @@ static void vga_update_text(void *opaque, console_ch_t *chardata)
     char msg_buffer[80];
     int full_update = 0;
 
+    qemu_flush_coalesced_mmio_buffer();
+
     if (!(s->ar_index & 0x20)) {
         graphic_mode = GMODE_BLANK;
     } else {
diff --git a/vl.c b/vl.c
index bd4a5ce..54d4dd9 100644
--- a/vl.c
+++ b/vl.c
@@ -1210,7 +1210,6 @@ static void gui_update(void *opaque)
     DisplayState *ds = opaque;
     DisplayChangeListener *dcl = ds->listeners;
 
-    qemu_flush_coalesced_mmio_buffer();
     dpy_refresh(ds);
 
     while (dcl != NULL) {
@@ -1226,7 +1225,6 @@ static void nographic_update(void *opaque)
 {
     uint64_t interval = GUI_REFRESH_INTERVAL;
 
-    qemu_flush_coalesced_mmio_buffer();
     qemu_mod_timer(nographic_timer, interval + qemu_get_clock_ms(rt_clock));
 }
 
-- 
1.7.3.4