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[Qemu-devel] [PATCH 3/4] bochs-display: add dirty tracking support
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH 3/4] bochs-display: add dirty tracking support |
Date: |
Thu, 17 May 2018 11:25:12 +0200 |
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/display/bochs-display.c | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/hw/display/bochs-display.c b/hw/display/bochs-display.c
index beeda58475..9ea6f798f4 100644
--- a/hw/display/bochs-display.c
+++ b/hw/display/bochs-display.c
@@ -192,9 +192,13 @@ nofb:
static void bochs_display_update(void *opaque)
{
BochsDisplayState *s = opaque;
+ DirtyBitmapSnapshot *snap = NULL;
+ bool full_update = false;
BochsDisplayMode mode;
DisplaySurface *ds;
uint8_t *ptr;
+ bool dirty;
+ int y, ys;
bochs_display_get_mode(s, &mode);
if (!mode.size) {
@@ -212,9 +216,34 @@ static void bochs_display_update(void *opaque)
mode.stride,
ptr + mode.offset);
dpy_gfx_replace_surface(s->con, ds);
+ full_update = true;
}
- dpy_gfx_update_full(s->con);
+ if (full_update) {
+ dpy_gfx_update_full(s->con);
+ } else {
+ snap = memory_region_snapshot_and_clear_dirty(&s->vram,
+ mode.offset, mode.size,
+ DIRTY_MEMORY_VGA);
+ ys = -1;
+ for (y = 0; y < mode.height; y++) {
+ dirty = memory_region_snapshot_get_dirty(&s->vram, snap,
+ mode.offset + mode.stride
* y,
+ mode.stride);
+ if (dirty && ys < 0) {
+ ys = y;
+ }
+ if (!dirty && ys >= 0) {
+ dpy_gfx_update(s->con, 0, ys,
+ mode.width, y - ys);
+ ys = -1;
+ }
+ }
+ if (ys >= 0) {
+ dpy_gfx_update(s->con, 0, ys,
+ mode.width, y - ys);
+ }
+ }
}
static const GraphicHwOps bochs_display_gfx_ops = {
@@ -250,6 +279,8 @@ static void bochs_display_realize(PCIDevice *dev, Error
**errp)
pci_set_byte(&s->pci.config[PCI_REVISION_ID], 2);
pci_register_bar(&s->pci, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
pci_register_bar(&s->pci, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio);
+
+ memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
}
static bool bochs_display_get_big_endian_fb(Object *obj, Error **errp)
--
2.9.3