281a26b15b
As pointed out by avi the vgabios update is guest-visible and thus has migration implications. One change is that the vga has a valid pci rom bar now. We already have a pci bus property to enable/disable the rom bar and we'll load the bios via fw_cfg as fallback for the no-rom-bar case. So we just have to add compat properties to handle this case. A second change is that the magic bochs lfb @ 0xe0000000 is gone. When live-migrating a guest from a older qemu version it might be using the lfb though, so we have to keep it for the old machine types. The patch enables the bochs lfb in case we don't have the pci rom bar enabled (i.e. we are in 0.13+older compat mode). This patch depends on these patches which add (and use) the pc-0.13 machine type: http://patchwork.ozlabs.org/patch/70797/ http://patchwork.ozlabs.org/patch/70798/ Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Cc: avi@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/*
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* QEMU PCI VGA Emulator.
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "console.h"
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#include "pc.h"
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#include "pci.h"
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#include "vga_int.h"
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#include "pixel_ops.h"
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#include "qemu-timer.h"
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#include "loader.h"
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typedef struct PCIVGAState {
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PCIDevice dev;
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VGACommonState vga;
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} PCIVGAState;
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static const VMStateDescription vmstate_vga_pci = {
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.name = "vga",
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.version_id = 2,
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.minimum_version_id = 2,
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.minimum_version_id_old = 2,
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.fields = (VMStateField []) {
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VMSTATE_PCI_DEVICE(dev, PCIVGAState),
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VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState),
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VMSTATE_END_OF_LIST()
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}
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};
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static void vga_map(PCIDevice *pci_dev, int region_num,
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pcibus_t addr, pcibus_t size, int type)
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{
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PCIVGAState *d = (PCIVGAState *)pci_dev;
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VGACommonState *s = &d->vga;
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cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
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s->map_addr = addr;
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s->map_end = addr + s->vram_size;
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vga_dirty_log_start(s);
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}
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static void pci_vga_write_config(PCIDevice *d,
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uint32_t address, uint32_t val, int len)
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{
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PCIVGAState *pvs = container_of(d, PCIVGAState, dev);
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VGACommonState *s = &pvs->vga;
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pci_default_write_config(d, address, val, len);
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if (s->map_addr && pvs->dev.io_regions[0].addr == -1)
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s->map_addr = 0;
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}
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static int pci_vga_initfn(PCIDevice *dev)
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{
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PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
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VGACommonState *s = &d->vga;
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uint8_t *pci_conf = d->dev.config;
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// vga + console init
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vga_common_init(s, VGA_RAM_SIZE);
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vga_init(s);
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s->ds = graphic_console_init(s->update, s->invalidate,
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s->screen_dump, s->text_update, s);
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// dummy VGA (same as Bochs ID)
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pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_QEMU);
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pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_QEMU_VGA);
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pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_VGA);
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/* XXX: VGA_RAM_SIZE must be a power of two */
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pci_register_bar(&d->dev, 0, VGA_RAM_SIZE,
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PCI_BASE_ADDRESS_MEM_PREFETCH, vga_map);
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if (!dev->rom_bar) {
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/* compatibility with pc-0.13 and older */
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vga_init_vbe(s);
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}
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return 0;
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}
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int pci_vga_init(PCIBus *bus)
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{
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pci_create_simple(bus, -1, "VGA");
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return 0;
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}
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static PCIDeviceInfo vga_info = {
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.qdev.name = "VGA",
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.qdev.size = sizeof(PCIVGAState),
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.qdev.vmsd = &vmstate_vga_pci,
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.init = pci_vga_initfn,
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.config_write = pci_vga_write_config,
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.romfile = "vgabios-stdvga.bin",
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};
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static void vga_register(void)
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{
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pci_qdev_register(&vga_info);
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}
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device_init(vga_register);
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