static void vfio_pci_size_rom(VFIODevice *vdev) { uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK); off_t offset = vdev->config_offset + PCI_ROM_ADDRESS; char name[32]; if (vdev->pdev.romfile || !vdev->pdev.rom_bar) { return; } /* * Use the same size ROM BAR as the physical device. The contents * will get filled in later when the guest tries to read it. */ if (pread(vdev->fd, &orig, 4, offset) != 4 || pwrite(vdev->fd, &size, 4, offset) != 4 || pread(vdev->fd, &size, 4, offset) != 4 || pwrite(vdev->fd, &orig, 4, offset) != 4) { error_report("%s(%04x:%02x:%02x.%x) failed: %m", __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function); return; } size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1; if (!size) { return; } DPRINTF("%04x:%02x:%02x.%x ROM size 0x%x\n", vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function, size); snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom", vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function); memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev), &vfio_rom_ops, vdev, name, size); pci_register_bar(&vdev->pdev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom); vdev->pdev.has_rom = true; }
static void vfio_pci_size_rom(VFIODevice *vdev) { uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK); off_t offset = vdev->config_offset + PCI_ROM_ADDRESS; char name[32]; if (vdev->pdev.romfile || !vdev->pdev.rom_bar) { return; }   if (pread(vdev->fd, &orig, 4, offset) != 4 || pwrite(vdev->fd, &size, 4, offset) != 4 || pread(vdev->fd, &size, 4, offset) != 4 || pwrite(vdev->fd, &orig, 4, offset) != 4) { error_report("%s(%04x:%02x:%02x.%x) failed: %m", __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function); return; } size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1; if (!size) { return; } DPRINTF("%04x:%02x:%02x.%x ROM size 0x%x\n", vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function, size); snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom", vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function); memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev), &vfio_rom_ops, vdev, name, size); pci_register_bar(&vdev->pdev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom); vdev->pdev.has_rom = true; }