With pc-0.12, we map the video RAM both through the PCI BAR (the guest does
this) and through a fixed mapping at 0xe0000000. The memory API doesn't allow
this double map, and aborts.
Fix by using an alias.
Reported-by: Michael Tokarev <m...@tls.msk.ru>
Signed-off-by: Avi Kivity <a...@redhat.com>
---
hw/vga.c | 7 ++++++-
hw/vga_int.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/hw/vga.c b/hw/vga.c
index 5824f85..d784df7 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -2357,10 +2357,15 @@ void vga_init(VGACommonState *s, MemoryRegion
*address_space,
void vga_init_vbe(VGACommonState *s, MemoryRegion *system_memory)
{
#ifdef CONFIG_BOCHS_VBE
+ /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
+ * so use an alias to avoid double-mapping the same region.
+ */
+ memory_region_init_alias(&s->vram_vbe, "vram.vbe",
+ &s->vram, 0, memory_region_size(&s->vram));
/* XXX: use optimized standard vga accesses */
memory_region_add_subregion(system_memory,
VBE_DISPI_LFB_PHYSICAL_ADDRESS,
- &s->vram);
+ &s->vram_vbe);
s->vbe_mapped = 1;
#endif
}
diff --git a/hw/vga_int.h b/hw/vga_int.h
index 7685b2b..d244d8f 100644
--- a/hw/vga_int.h
+++ b/hw/vga_int.h
@@ -105,6 +105,7 @@ typedef struct VGACommonState {
MemoryRegion *legacy_address_space;
uint8_t *vram_ptr;
MemoryRegion vram;
+ MemoryRegion vram_vbe;
uint32_t vram_size;
uint32_t latch;
MemoryRegion *chain4_alias;
--
1.7.10.1
