但是,固件完成 ACPI 表的设置并将控制权移交给来宾内核后,后者可以使用 fw_cfg ACPI 节点来更准确地列出正在使用的 IOport 或 MMIO 区域。 固件配置项 签名(密钥0x0000,) 通过使用密钥0x0000()选择“签名”项,并从数据寄存器读取四个字节,可以验证fw_cfg选择器和数据寄存器的存在。如果fw_cfg设备存在,则读取的...
… #include "hw/nvram/fw_cfg.h" #include "pci.h" #include "trace.h" // ascend-patch begin #define PCI_VENDOR_ID_HUAWEI 0x19e5 #define PCI_DEVICE_ID_ASCEND910 0xd801 #define PCI_DEVICE_ID_ASCEND910_A2 0xd802 #define PCI_DEVICE_ID_ASCEND310P 0xd500 #define PCI_DEVICE_ID_ASCEND310...
… #include "hw/nvram/fw_cfg.h" #include "pci.h" #include "trace.h" // ascend-patch begin #define PCI_VENDOR_ID_HUAWEI 0x19e5 #define PCI_DEVICE_ID_ASCEND910 0xd801 #define PCI_DEVICE_ID_ASCEND910_A2 0xd802 #define PCI_DEVICE_ID_ASCEND310P 0xd500 #define PCI_DEVICE_ID_ASCEND310...
修改QEMU源码。 执行如下命令,修改“pci-quirks.c”文件。 vi ./hw/vfio/pci-quirks.c 增加如下加粗字体标注的代码并保存: … #include "hw/nvram/fw_cfg.h" #include "pci.h" #include "trace.h" // ascend-patch begin #define PCI_VENDOR_ID_HUAWEI 0x19e5 #define PCI_DEVICE_ID_ASCEND910 0xd80...
//创建TYPE_FW_CFG_IO设备 dev = qdev_new(TYPE_FW_CFG_IO); if (!dma_requested) { qdev_prop_set_bit(dev, "dma_enabled", false); } object_property_add_child(OBJECT(qdev_get_machine()), TYPE_FW_CFG, OBJECT(dev)); sbd = SYS_BUS_DEVICE(dev); ...
(&qemu_msg_opts); qemu_add_opts(&qemu_name_opts); qemu_add_opts(&qemu_numa_opts); qemu_add_opts(&qemu_icount_opts); qemu_add_opts(&qemu_semihosting_config_opts); qemu_add_opts(&qemu_fw_cfg_opts); qemu_add_opts(&qemu_action_opts); qemu_add_run_with_opts(); module_call_init...
FWCfgState*fw_cfg; MachineState*machine =MACHINE(pcms); PCMachineClass*pcmc =PC_MACHINE_GET_CLASS(pcms); assert(machine->ram_size == pcms->below_4g_mem_size +pcms->above_4g_mem_size); linux_boot= (machine->kernel_filename !=NULL);/*Allocate RAM. We allocate it as a single memory...
guest_info->fw_cfg =fw_cfg;returnfw_cfg; } 从总体上来讲,该函数主要完成了三个工作:分配全局ram(一整个memory region),然后根据below_4g_mem_size、above_4g_mem_size分别对ram进行划分,形成子MR,并注册子MR到root MR system_memory 的subregions链表中。最后需要调用memory_region_transaction_commit()函数...
fw_cfg条目由 QEMU 传递给来宾。 例: -fw_cfgname=opt/com.mycompany/blob,file=./my_blob.bin 创建一个名为 opt/com.mycompany/blob 的fw_cfg条目,其中包含来自 ./my_blob.bin 的内容。 -serialdev 重定向虚拟串口至主机字符设备开发。默认设备处于图形模式和非图形模式。vcstdio ...
(fw_cfg) device, originally intended as a way for the host to 8+ provide configuration data to the guest firmware. Starting 9+ with QEMU v2.4, arbitrary fw_cfg file entries may be specified 10+ by the user on the command line, which makes fw_cfg additionally ...