VMware VGA: Only enable dirty log tracking when fifo is disabled

This patch enables dirty log tracking whenever it's needed and disables it
when it is not.

We unconditionally enable dirty log tracking on reset, restart dirty log
tracking when PCI IO regions are remapped, and disable/enable it based on
commands from the guest.

Rebased-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

3 files changed, 36 insertions, 4 deletions

diff --git a/hw/vga.c b/hw/vga.c
index 5b0c55e99d..d05f1f9d19 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -1606,7 +1606,29 @@ void vga_dirty_log_start(VGACommonState *s)
         kvm_log_start(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
     }
 #endif
+}
+
+void vga_dirty_log_stop(VGACommonState *s)
+{
+    if (kvm_enabled() && s->map_addr)
+	kvm_log_stop(s->map_addr, s->map_end - s->map_addr);
+
+    if (kvm_enabled() && s->lfb_vram_mapped) {
+	kvm_log_stop(isa_mem_base + 0xa0000, 0x80000);
+	kvm_log_stop(isa_mem_base + 0xa8000, 0x80000);
+    }
 
+#ifdef CONFIG_BOCHS_VBE
+    if (kvm_enabled() && s->vbe_mapped) {
+	kvm_log_stop(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
+    }
+#endif
+}
+
+void vga_dirty_log_restart(VGACommonState *s)
+{
+    vga_dirty_log_stop(s);
+    vga_dirty_log_start(s);
 }
 
 /*
diff --git a/hw/vga_int.h b/hw/vga_int.h
index b5302c15b6..23a42efce1 100644
--- a/hw/vga_int.h
+++ b/hw/vga_int.h
@@ -194,6 +194,8 @@ void vga_init(VGACommonState *s);
 void vga_common_reset(VGACommonState *s);
 
 void vga_dirty_log_start(VGACommonState *s);
+void vga_dirty_log_stop(VGACommonState *s);
+void vga_dirty_log_restart(VGACommonState *s);
 
 extern const VMStateDescription vmstate_vga_common;
 uint32_t vga_ioport_read(void *opaque, uint32_t addr);
diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
index ae913270f6..e3d5706139 100644
--- a/hw/vmware_vga.c
+++ b/hw/vmware_vga.c
@@ -771,8 +771,12 @@ static void vmsvga_value_write(void *opaque, uint32_t address, uint32_t value)
         s->height = -1;
         s->invalidated = 1;
         s->vga.invalidate(&s->vga);
-        if (s->enable)
-            s->fb_size = ((s->depth + 7) >> 3) * s->new_width * s->new_height;
+        if (s->enable) {
+	  s->fb_size = ((s->depth + 7) >> 3) * s->new_width * s->new_height;
+	  vga_dirty_log_stop(&s->vga);
+	} else {
+	  vga_dirty_log_start(&s->vga);
+	}
         break;
 
     case SVGA_REG_WIDTH:
@@ -948,6 +952,8 @@ static void vmsvga_reset(struct vmsvga_state_s *s)
         break;
     }
     s->syncing = 0;
+
+    vga_dirty_log_start(&s->vga);
 }
 
 static void vmsvga_invalidate_display(void *opaque)
@@ -1119,7 +1125,6 @@ static void vmsvga_init(struct vmsvga_state_s *s, int vga_ram_size)
                                      vmsvga_screen_dump,
                                      vmsvga_text_update, s);
 
-    vmsvga_reset(s);
 
     s->fifo_size = SVGA_FIFO_SIZE;
     s->fifo_offset = qemu_ram_alloc(s->fifo_size);
@@ -1130,7 +1135,10 @@ static void vmsvga_init(struct vmsvga_state_s *s, int vga_ram_size)
     vmstate_register(0, &vmstate_vga_common, &s->vga);
 
     vga_init_vbe(&s->vga);
+
     rom_add_vga(VGABIOS_FILENAME);
+
+    vmsvga_reset(s);
 }
 
 static void pci_vmsvga_map_ioport(PCIDevice *pci_dev, int region_num,
@@ -1172,7 +1180,7 @@ static void pci_vmsvga_map_mem(PCIDevice *pci_dev, int region_num,
 
     s->vga.map_addr = addr;
     s->vga.map_end = addr + s->vga.vram_size;
-    vga_dirty_log_start(&s->vga);
+    vga_dirty_log_restart(&s->vga);
 }
 
 static void pci_vmsvga_map_fifo(PCIDevice *pci_dev, int region_num,