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VGA: Flush coalesced MMIO on related MMIO/PIO accesses

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In preparation of stopping to flush coalesced MMIO unconditionally on
vmexits, mark VGA MMIO and PIO regions as synchronous /wrt coalesced
MMIO and flush the buffer explicitly on PIO accesses that do not use
generic memory regions yet.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Jan Kiszka 2012-08-23 13:02:33 +02:00 • committed by Marcelo Tosatti
parent bb880ded7a
commit bd8f2f5d70
5 changed files with 15 additions and 0 deletions
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7
hw/cirrus_vga.c
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@ -2441,6 +2441,8 @@ static uint32_t cirrus_vga_ioport_read(void *opaque, uint32_t addr)
VGACommonState *s = &c->vga;
int val, index;
qemu_flush_coalesced_mmio_buffer();
if (vga_ioport_invalid(s, addr)) {
val = 0xff;
} else {
@ -2534,6 +2536,8 @@ static void cirrus_vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
VGACommonState *s = &c->vga;
int index;
qemu_flush_coalesced_mmio_buffer();
/* check port range access depending on color/monochrome mode */
if (vga_ioport_invalid(s, addr)) {
return;
@ -2854,6 +2858,7 @@ static void cirrus_init_common(CirrusVGAState * s, int device_id, int is_pci,
/* I/O handler for LFB */
memory_region_init_io(&s->cirrus_linear_io, &cirrus_linear_io_ops, s,
"cirrus-linear-io", VGA_RAM_SIZE);
memory_region_set_flush_coalesced(&s->cirrus_linear_io);
/* I/O handler for LFB */
memory_region_init_io(&s->cirrus_linear_bitblt_io,
@ -2861,10 +2866,12 @@ static void cirrus_init_common(CirrusVGAState * s, int device_id, int is_pci,
s,
"cirrus-bitblt-mmio",
0x400000);
memory_region_set_flush_coalesced(&s->cirrus_linear_bitblt_io);
/* I/O handler for memory-mapped I/O */
memory_region_init_io(&s->cirrus_mmio_io, &cirrus_mmio_io_ops, s,
"cirrus-mmio", CIRRUS_PNPMMIO_SIZE);
memory_region_set_flush_coalesced(&s->cirrus_mmio_io);
s->real_vram_size =
(s->device_id == CIRRUS_ID_CLGD5446) ? 4096 * 1024 : 2048 * 1024;