2 * This is splited from hw/i386/kvm/pci-assign.c
4 #include "qemu/osdep.h"
5 #include "qapi/error.h"
7 #include "hw/i386/pc.h"
8 #include "qemu/error-report.h"
9 #include "ui/console.h"
10 #include "hw/loader.h"
11 #include "monitor/monitor.h"
12 #include "qemu/range.h"
13 #include "sysemu/sysemu.h"
14 #include "hw/pci/pci.h"
15 #include "hw/pci/pci-assign.h"
18 * Scan the assigned devices for the devices that have an option ROM, and then
19 * load the corresponding ROM data to RAM. If an error occurs while loading an
20 * option ROM, we just ignore that option ROM and continue with the next one.
22 void *pci_assign_dev_load_option_rom(PCIDevice *dev, struct Object *owner,
23 int *size, unsigned int domain,
24 unsigned int bus, unsigned int slot,
25 unsigned int function)
27 char name[32], rom_file[64];
33 /* If loading ROM from file, pci handles it */
34 if (dev->romfile || !dev->rom_bar) {
38 snprintf(rom_file, sizeof(rom_file),
39 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
40 domain, bus, slot, function);
42 if (stat(rom_file, &st)) {
46 /* Write "1" to the ROM file to enable it */
47 fp = fopen(rom_file, "r+");
49 error_report("pci-assign: Cannot open %s: %s", rom_file, strerror(errno));
53 if (fwrite(&val, 1, 1, fp) != 1) {
56 fseek(fp, 0, SEEK_SET);
58 snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner));
59 memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort);
60 vmstate_register_ram(&dev->rom, &dev->qdev);
61 ptr = memory_region_get_ram_ptr(&dev->rom);
62 memset(ptr, 0xff, st.st_size);
64 if (!fread(ptr, 1, st.st_size, fp)) {
65 error_report("pci-assign: Cannot read from host %s", rom_file);
66 error_printf("Device option ROM contents are probably invalid "
67 "(check dmesg).\nSkip option ROM probe with rombar=0, "
68 "or load from file with romfile=\n");
72 pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom);
76 /* Write "0" to disable ROM */
77 fseek(fp, 0, SEEK_SET);
79 if (!fwrite(&val, 1, 1, fp)) {
80 DEBUG("%s\n", "Failed to disable pci-sysfs rom file");