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