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Diffstat (limited to 'qemu/hw/i386/pci-assign-load-rom.c')
-rw-r--r--qemu/hw/i386/pci-assign-load-rom.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/qemu/hw/i386/pci-assign-load-rom.c b/qemu/hw/i386/pci-assign-load-rom.c
new file mode 100644
index 000000000..4bbb08c95
--- /dev/null
+++ b/qemu/hw/i386/pci-assign-load-rom.c
@@ -0,0 +1,85 @@
+/*
+ * 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 "hw/pci/pci-assign.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, struct Object *owner,
+ 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;
+
+ /* 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);
+
+ if (stat(rom_file, &st)) {
+ return NULL;
+ }
+
+ /* Write "1" to the ROM file to enable it */
+ fp = fopen(rom_file, "r+");
+ if (fp == NULL) {
+ error_report("pci-assign: Cannot open %s: %s", rom_file, strerror(errno));
+ return NULL;
+ }
+ 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);
+ vmstate_register_ram(&dev->rom, &dev->qdev);
+ 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)) {
+ DEBUG("%s\n", "Failed to disable pci-sysfs rom file");
+ }
+ fclose(fp);
+
+ return ptr;
+}