The xen pci_assign_dev_load_option_rom() currently creates a RAM memory region with memory_region_init_ram_nomigrate(), and then manually registers it with vmstate_register_ram(). In fact for its only callsite, the 'owner' pointer we use for the init call and the '&dev->qdev' pointer we use for the vmstate_register_ram() call refer to the same object. Simplify the function to only take a pointer to the device once instead of twice, and use memory_region_init_ram() which automatically does the vmstate register for us. Acked-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/*
|
|
* This is splited from hw/i386/kvm/pci-assign.c
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "hw/hw.h"
|
|
#include "hw/i386/pc.h"
|
|
#include "qemu/error-report.h"
|
|
#include "ui/console.h"
|
|
#include "hw/loader.h"
|
|
#include "monitor/monitor.h"
|
|
#include "qemu/range.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "hw/pci/pci.h"
|
|
#include "xen_pt.h"
|
|
|
|
/*
|
|
* Scan the assigned devices for the devices that have an option ROM, and then
|
|
* load the corresponding ROM data to RAM. If an error occurs while loading an
|
|
* option ROM, we just ignore that option ROM and continue with the next one.
|
|
*/
|
|
void *pci_assign_dev_load_option_rom(PCIDevice *dev,
|
|
int *size, unsigned int domain,
|
|
unsigned int bus, unsigned int slot,
|
|
unsigned int function)
|
|
{
|
|
char name[32], rom_file[64];
|
|
FILE *fp;
|
|
uint8_t val;
|
|
struct stat st;
|
|
void *ptr = NULL;
|
|
Object *owner = OBJECT(dev);
|
|
|
|
/* If loading ROM from file, pci handles it */
|
|
if (dev->romfile || !dev->rom_bar) {
|
|
return NULL;
|
|
}
|
|
|
|
snprintf(rom_file, sizeof(rom_file),
|
|
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
|
|
domain, bus, slot, function);
|
|
|
|
/* Write "1" to the ROM file to enable it */
|
|
fp = fopen(rom_file, "r+");
|
|
if (fp == NULL) {
|
|
if (errno != ENOENT) {
|
|
error_report("pci-assign: Cannot open %s: %s", rom_file, strerror(errno));
|
|
}
|
|
return NULL;
|
|
}
|
|
if (fstat(fileno(fp), &st) == -1) {
|
|
error_report("pci-assign: Cannot stat %s: %s", rom_file, strerror(errno));
|
|
goto close_rom;
|
|
}
|
|
|
|
val = 1;
|
|
if (fwrite(&val, 1, 1, fp) != 1) {
|
|
goto close_rom;
|
|
}
|
|
fseek(fp, 0, SEEK_SET);
|
|
|
|
snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner));
|
|
memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort);
|
|
ptr = memory_region_get_ram_ptr(&dev->rom);
|
|
memset(ptr, 0xff, st.st_size);
|
|
|
|
if (!fread(ptr, 1, st.st_size, fp)) {
|
|
error_report("pci-assign: Cannot read from host %s", rom_file);
|
|
error_printf("Device option ROM contents are probably invalid "
|
|
"(check dmesg).\nSkip option ROM probe with rombar=0, "
|
|
"or load from file with romfile=\n");
|
|
goto close_rom;
|
|
}
|
|
|
|
pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom);
|
|
dev->has_rom = true;
|
|
*size = st.st_size;
|
|
close_rom:
|
|
/* Write "0" to disable ROM */
|
|
fseek(fp, 0, SEEK_SET);
|
|
val = 0;
|
|
if (!fwrite(&val, 1, 1, fp)) {
|
|
XEN_PT_WARN(dev, "%s\n", "Failed to disable pci-sysfs rom file");
|
|
}
|
|
fclose(fp);
|
|
|
|
return ptr;
|
|
}
|