Support PCI based option rom loading

Currently, we preload option roms into the option rom space in memory.  This
prevents DDIM from functioning correctly which severely limits the number
of roms we can support.

This patch introduces a pci_add_option_rom() which registers the
PCI_ROM_ADDRESS bar which points to our option rom.  It also converts over
the cirrus vga adapter, the rtl8139, virtio, and the e1000 to use this
new mechanism.

The result is that PXE boot functions even with three unique types of cards.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/hw/pci.h b/hw/pci.h
index dc9b860..d25fe50 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -242,6 +242,9 @@ struct PCIDevice {
     uint32_t msix_bar_size;
     /* Version id needed for VMState */
     int32_t version_id;
+
+    /* Location of option rom */
+    ram_addr_t rom_offset;
 };
 
 PCIDevice *pci_register_device(PCIBus *bus, const char *name,
@@ -253,6 +256,8 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
                             pcibus_t size, int type,
                             PCIMapIORegionFunc *map_func);
 
+int pci_add_option_rom(PCIDevice *pdev, const char *name);
+
 int pci_add_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);
 
 void pci_del_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);