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vbe: make bochs dispi interface return the correct memory size with qxl

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VgaState->vram_size is the size of the pci bar.  In case of qxl not the
whole pci bar can be used as vga framebuffer.  Add a new variable
vbe_size to handle that case.  By default (if unset) it equals
vram_size, but qxl can set vbe_size to something else.

This makes sure VBE_DISPI_INDEX_VIDEO_MEMORY_64K returns correct results
and sanity checks are done with the correct size too.

Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-08-26 14:16:30 +02:00
parent 30eaca3acd
commit 54a85d4624
3 changed files with 7 additions and 2 deletions
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1
hw/display/qxl.c
View File

@ -2063,6 +2063,7 @@ static int qxl_init_primary(PCIDevice *dev)
qxl->id = 0;
qxl_init_ramsize(qxl);
vga->vbe_size = qxl->vgamem_size;
vga->vram_size_mb = qxl->vga.vram_size >> 20;
vga_common_init(vga, OBJECT(dev), true);
vga_init(vga, OBJECT(dev),

7
hw/display/vga.c
View File

@ -610,7 +610,7 @@ uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
val = s->vbe_regs[s->vbe_index];
}
} else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
val = s->vram_size / (64 * 1024);
val = s->vbe_size / (64 * 1024);
} else {
val = 0;
}
@ -749,7 +749,7 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
line_offset = w >> 1;
else
line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
h = s->vram_size / line_offset;
h = s->vbe_size / line_offset;
/* XXX: support weird bochs semantics ? */
if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
return;
@ -2285,6 +2285,9 @@ void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
s->vram_size <<= 1;
}
s->vram_size_mb = s->vram_size >> 20;
if (!s->vbe_size) {
s->vbe_size = s->vram_size;
}
s->is_vbe_vmstate = 1;
memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size);

1
hw/display/vga_int.h
View File

@ -93,6 +93,7 @@ typedef struct VGACommonState {
MemoryRegion vram_vbe;
uint32_t vram_size;
uint32_t vram_size_mb; /* property */
uint32_t vbe_size;
uint32_t latch;
bool has_chain4_alias;
MemoryRegion chain4_alias;