chardev: fix race with client connections in tcp_chr_wait_connected
[qemu/ar7.git] / hw / xen / xen_pt_load_rom.c
blobe6a86ca818026d71109c55afe017cce918fdbbc4
1 /*
2 * This is splited from hw/i386/kvm/pci-assign.c
3 */
4 #include "qemu/osdep.h"
5 #include "qapi/error.h"
6 #include "hw/hw.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 "xen_pt.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,
23 int *size, unsigned int domain,
24 unsigned int bus, unsigned int slot,
25 unsigned int function)
27 char name[32], rom_file[64];
28 FILE *fp;
29 uint8_t val;
30 struct stat st;
31 void *ptr = NULL;
32 Object *owner = OBJECT(dev);
34 /* If loading ROM from file, pci handles it */
35 if (dev->romfile || !dev->rom_bar) {
36 return NULL;
39 snprintf(rom_file, sizeof(rom_file),
40 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
41 domain, bus, slot, function);
43 /* Write "1" to the ROM file to enable it */
44 fp = fopen(rom_file, "r+");
45 if (fp == NULL) {
46 if (errno != ENOENT) {
47 error_report("pci-assign: Cannot open %s: %s", rom_file, strerror(errno));
49 return NULL;
51 if (fstat(fileno(fp), &st) == -1) {
52 error_report("pci-assign: Cannot stat %s: %s", rom_file, strerror(errno));
53 goto close_rom;
56 val = 1;
57 if (fwrite(&val, 1, 1, fp) != 1) {
58 goto close_rom;
60 fseek(fp, 0, SEEK_SET);
62 snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner));
63 memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort);
64 ptr = memory_region_get_ram_ptr(&dev->rom);
65 memset(ptr, 0xff, st.st_size);
67 if (!fread(ptr, 1, st.st_size, fp)) {
68 error_report("pci-assign: Cannot read from host %s", rom_file);
69 error_printf("Device option ROM contents are probably invalid "
70 "(check dmesg).\nSkip option ROM probe with rombar=0, "
71 "or load from file with romfile=\n");
72 goto close_rom;
75 pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom);
76 dev->has_rom = true;
77 *size = st.st_size;
78 close_rom:
79 /* Write "0" to disable ROM */
80 fseek(fp, 0, SEEK_SET);
81 val = 0;
82 if (!fwrite(&val, 1, 1, fp)) {
83 XEN_PT_WARN(dev, "%s\n", "Failed to disable pci-sysfs rom file");
85 fclose(fp);
87 return ptr;