Re: [libvirt] [PATCH v2 4/4] hw/display: Remove "rombar" hack from vga-pci and vmware_vga

On 09/12/19 14:12, Philippe Mathieu-Daudé wrote: Yes, even inline vga_init_vbe and remove vbe_mapped. ----------------- 8< ---------------- From: Paolo Bonzini <pbonzini(a)redhat.com&gt; Subject: [PATCH] vga: cleanup mapping of VRAM for non-PCI VGA vga_init_vbe is now used only from ISA VGA cards. Since the alias is not needed anymore, remove it (effectively reverting commit 8294a64d7f, "vga: fix vram double-mapping with -vga std and -M pc-0.12", 2012-05-29) and the new unused vbe_mapped field of VGACommonState. The function now consists of a single memory_region_add_subregion call, so we can inline it and avoid incorrect usage from PCI cards. Suggested-by: Philippe Mathieu-Daudé <philmd(a)redhat.com&gt; Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com&gt; diff --git a/hw/display/vga-isa-mm.c b/hw/display/vga-isa-mm.c index e9c43e5530..06f93c4ef5 100644 --- a/hw/display/vga-isa-mm.c +++ b/hw/display/vga-isa-mm.c @@ -106,6 +106,9 @@ int isa_vga_mm_init(hwaddr vram_base, s->vga.con = graphic_console_init(NULL, 0, s->vga.hw_ops, s); - vga_init_vbe(&s->vga, NULL, address_space); + memory_region_add_subregion(system_memory, + VBE_DISPI_LFB_PHYSICAL_ADDRESS, + &s->vram); + return 0; } diff --git a/hw/display/vga-isa.c b/hw/display/vga-isa.c index 873e5e9706..5b0b567835 100644 --- a/hw/display/vga-isa.c +++ b/hw/display/vga-isa.c @@ -76,7 +76,9 @@ static void vga_isa_realizefn(DeviceState *dev, Error **errp) memory_region_set_coalescing(vga_io_memory); s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s); - vga_init_vbe(s, OBJECT(dev), isa_address_space(isadev)); + memory_region_add_subregion(system_memory, + VBE_DISPI_LFB_PHYSICAL_ADDRESS, + &s->vram); /* ROM BIOS */ rom_add_vga(VGABIOS_FILENAME); } diff --git a/hw/display/vga.c b/hw/display/vga.c index 636586a476..061fd9ab8f 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -2301,15 +2301,3 @@ void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space, portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce); } } - -void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory) -{ - /* Use an alias to avoid double-mapping the same region */ - memory_region_init_alias(&s->vram_vbe, obj, "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_vbe); - s->vbe_mapped = 1; -} diff --git a/hw/display/vga_int.h b/hw/display/vga_int.h index 55c418eab5..3081be445d 100644 --- a/hw/display/vga_int.h +++ b/hw/display/vga_int.h @@ -106,7 +106,6 @@ typedef struct VGACommonState { uint32_t vbe_start_addr; uint32_t vbe_line_offset; uint32_t vbe_bank_mask; - int vbe_mapped; /* display refresh support */ QemuConsole *con; uint32_t font_offsets[2]; @@ -178,7 +177,6 @@ void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2); int vga_ioport_invalid(VGACommonState *s, uint32_t addr); -void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *address_space); uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr); void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val); void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val);