C++ (Cpp) pc_fw_add_pflash_drv Examples

Example #1

File: pc_sysfw.c Project: hypersimple/QEMU-Logger-and-VM-Introspector

void pc_system_firmware_init(MemoryRegion *rom_memory)
{
    DriveInfo *pflash_drv;
    PcSysFwDevice *sysfw_dev;

    sysfw_dev = (PcSysFwDevice*) qdev_create(NULL, "pc-sysfw");

    qdev_init_nofail(DEVICE(sysfw_dev));

    if (sysfw_dev->rom_only) {
        old_pc_system_rom_init(rom_memory);
        return;
    }

    pflash_drv = drive_get(IF_PFLASH, 0, 0);

    /* Currently KVM cannot execute from device memory.
       Use old rom based firmware initialization for KVM. */
    if (kvm_enabled()) {
        if (pflash_drv != NULL) {
            fprintf(stderr, "qemu: pflash cannot be used with kvm enabled\n");
            exit(1);
        } else {
            sysfw_dev->rom_only = 1;
            old_pc_system_rom_init(rom_memory);
            return;
        }
    }

    /* If a pflash drive is not found, then create one using
       the bios filename. */
    if (pflash_drv == NULL) {
        pc_fw_add_pflash_drv();
        pflash_drv = drive_get(IF_PFLASH, 0, 0);
    }

    if (pflash_drv != NULL) {
        pc_system_flash_init(rom_memory, pflash_drv);
    } else {
        fprintf(stderr, "qemu: PC system firmware (pflash) not available\n");
        exit(1);
    }
}

Example #2

File: pc_sysfw.c Project: CarterTsai/qemu-semihost

void pc_system_firmware_init(MemoryRegion *rom_memory)
{
    DriveInfo *pflash_drv;
    PcSysFwDevice *sysfw_dev;

    /*
     * TODO This device exists only so that users can switch between
     * use of flash and ROM for the BIOS.  The ability to switch was
     * created because flash doesn't work with KVM.  Once it does, we
     * should drop this device.
     */
    sysfw_dev = (PcSysFwDevice*) qdev_create(NULL, "pc-sysfw");

    qdev_init_nofail(DEVICE(sysfw_dev));

    pflash_drv = drive_get(IF_PFLASH, 0, 0);

    if (pc_sysfw_flash_vs_rom_bug_compatible) {
        /*
         * This is a Bad Idea, because it makes enabling/disabling KVM
         * guest-visible.  Do it only in bug-compatibility mode.
         */
        if (kvm_enabled()) {
            if (pflash_drv != NULL) {
                fprintf(stderr, "qemu: pflash cannot be used with kvm enabled\n");
                exit(1);
            } else {
                /* In old pc_sysfw_flash_vs_rom_bug_compatible mode, we assume
                 * that KVM cannot execute from device memory. In this case, we
                 * use old rom based firmware initialization for KVM. But, since
                 * this is different from non-kvm mode, this behavior is
                 * undesirable */
                sysfw_dev->rom_only = 1;
            }
        }
    } else if (pflash_drv == NULL) {
        /* When a pflash drive is not found, use rom-mode */
        sysfw_dev->rom_only = 1;
    } else if (kvm_enabled() && !kvm_readonly_mem_enabled()) {
        /* Older KVM cannot execute from device memory. So, flash memory
         * cannot be used unless the readonly memory kvm capability is present. */
        fprintf(stderr, "qemu: pflash with kvm requires KVM readonly memory support\n");
        exit(1);
    }

    /* If rom-mode is active, use the old pc system rom initialization. */
    if (sysfw_dev->rom_only) {
        old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw);
        return;
    }

    /* If a pflash drive is not found, then create one using
       the bios filename. */
    if (pflash_drv == NULL) {
        pc_fw_add_pflash_drv();
        pflash_drv = drive_get(IF_PFLASH, 0, 0);
    }

    if (pflash_drv != NULL) {
        pc_system_flash_init(rom_memory, pflash_drv);
    } else {
        fprintf(stderr, "qemu: PC system firmware (pflash) not available\n");
        exit(1);
    }
}