CN111224867A - Intelligent gateway method based on multi-core heterogeneous hardware virtualization - Google Patents
Intelligent gateway method based on multi-core heterogeneous hardware virtualization Download PDFInfo
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Abstract
The invention relates to the technical field of intelligent gateways, in particular to an intelligent gateway method based on multi-core heterogeneous hardware virtualization, which is characterized in that based on an imx8 multi-core heterogeneous processor, hardware partitions are carried out, a CPU core and peripheral equipment are distributed, the CPU is divided into a first partition and a second partition, an operating system is further arranged in the two partitions for virtualization, an intelligent gateway system based on hardware virtualization physically divides the multi-core heterogeneous CPU and the peripheral equipment into two hardware partitions by the hardware virtualization method, an intranet operating system and an extranet operating system are respectively arranged on the two hardware partitions, the intranet operating system and the extranet operating system carry out information interaction through a message hardware unit, thus ensuring that a wired gateway in a vehicle cannot be paralyzed due to external attack of a wireless gateway outside the vehicle, ensuring the driving safety, and simultaneously preventing hackers from obtaining physical signals of the message hardware unit, therefore, the information between the two systems can not be cracked, and the information exchange safety of the two systems is ensured.
Description
Technical Field
The invention relates to the technical field of intelligent gateways, in particular to an intelligent gateway method based on multi-core heterogeneous hardware virtualization.
Background
The existing intelligent gateway has three types at present, wherein one type is that a single operating system runs on a CPU and belongs to a single system; the other type is that a plurality of operating systems run on a CPU through a software virtualization technology; still another type is a multi-CPU multi-os system that uses multiple CPUs to run multiple os. The existing intelligent gateway system is more and more complex, has more and more powerful functions, has higher and more requirements on the performance of a CPU, is safe and reliable, and can prevent the system from being disabled due to external invasion, so that the first type of single-CPU single-operation system can obviously not meet the requirements of the intelligent gateway with complex and powerful functions, and the system can not be used after being disabled; the second type is single-CPU software virtualization, and in the software virtualization solution, the position of the virtualization system software in the software suite is the position where the operating system is located in the traditional sense, and the position of the operating system is the position where the application program is located in the traditional sense; this additional layer of communication requires binary translation to simulate a hardware environment by providing an interface to physical resources such as processors, memory, storage, video and network cards, etc. Such a conversion necessarily increases the complexity of the system. Furthermore, the support of guest operating systems is limited by the capabilities of the virtual machine environment, which may prevent the deployment of certain technologies, such as 64-bit guest operating systems. In a pure software solution, the increased complexity of the software stack means that these environments are difficult to manage, thus adding to the difficulty of ensuring system reliability and security; in the third type of multi-CPU and multi-system intelligent gateway, because of the adoption of multiple CPUs, additional memories, hard disks, peripherals and the like are required outside the CPUs, so that the cost of the system is greatly increased, and meanwhile, the peripherals are communicated through the peripherals, so that information leakage is easily caused by hackers who monitor and crack through the board peripherals and physical signals, and the gateway is unsafe.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a multi-core heterogeneous hardware virtualization intelligent gateway system for virtualizing a CPU into two physically isolated hardware partitions.
The purpose of the invention is realized by the following technical scheme:
an intelligent gateway method based on multi-core heterogeneous hardware virtualization divides a multi-core heterogeneous CPU and a peripheral into two hardware subareas through a hardware virtualization method, an internal network operating system and an external network operating system are respectively installed on the two hardware subareas, the operating systems of the two hardware subareas are mutually independent and do not interfere with each other, the internal network operating system and the external network operating system carry out information interaction through a message hardware unit, the information interaction is that the internal network operating system and the external network operating system CAN be restarted to each other according to needs, the internal network operating system runs a wired gateway which is respectively in communication connection with a CAN/LIN module and an Ethernet module, the external network operating system runs a wireless gateway which is respectively in communication connection with a mobile network communication module and a V2X module, two physically isolated systems are virtualized through the multi-core heterogeneous hardware, and the communication safety between networks inside and outside a vehicle is ensured, the wired gateway in the vehicle can not be paralyzed due to external attack of the wireless gateway outside the vehicle, thereby ensuring the driving safety.
The hardware virtualization method operates as follows:
step 1) allocating a CPU core and a memory in an imx8 processor, dividing the CPU into a first partition and a second partition, wherein the CPU of the first partition performs instruction from a memory address 0x80000000, and the CPU of the second partition jumps to a memory address 0xC0000000 for instruction after instruction from 0x 80000000;
step 2) an outer network operating system and an inner network operating system are respectively installed in a first partition and a second partition, the inner network operating system and the outer network operating system are stored by adopting different EMCC modules, the inner network operating system and the outer network operating system both comprise uboot, kernel and a file system, and a bootloader bootstrap program is installed in the first partition, wherein the bootloader bootstrap program comprises two ARM trust firmware files which are respectively used for peripheral distribution when the first partition and the second partition are started;
step 3) powering on the intelligent gateway system, reading a bootloader bootstrap program from an EMMC module in a first partition by the intelligent gateway system, copying two ARM trust firmware files and uboot to memory addresses 0x80000000 and 0xC0000000 respectively, firstly operating a first CPU core of the first partition, then starting a first CPU core of a second partition, judging which partition is the core in the ARM trust firmware files, if the partition is the first CPU core, jumping to the first ARM trust firmware file address 0x80000000, operating the ARM trust firmware files for peripheral distribution, then jumping to the first uboot, and loading kenerl and a file system of an external network operating system; if the CPU core is the second CPU core, jumping to the address 0xC0000000 of the second ATF to run the second ATF, performing peripheral distribution, then jumping to the second uboot, and loading the kernel and the file system of the second linux system;
step 4), the extranet operating system of the first partition operates a mobile network communication module and a V2X module communication module;
and 5) operating the CAN/LIN module and the Ethernet module by the extranet operating system of the second partition.
Specifically, the intranet operating system and the extranet operating system are linux operating systems.
Specifically, the mobile network communication module is a 5G communication module.
Compared with the prior art, the invention has the following advantages and beneficial effects: the invention virtualizes two physically isolated systems by adopting multi-core heterogeneous hardware, one system runs the function of the in-vehicle wired gateway, and the other system is responsible for the function of the out-vehicle wireless gateway, thus ensuring that the in-vehicle wired gateway is not paralyzed due to the out-vehicle wireless gateway being attacked by the outside, ensuring the driving safety, simultaneously, the whole system only adopts a multi-core heterogeneous CPU, effectively reducing the cost and the complexity of the system, two hardware partitions virtualized by one CPU communicate through an internal message hardware unit, a hacker cannot acquire the physical signal of the message hardware unit, thereby failing to crack the message between the two systems, and ensuring the information exchange safety of the two systems.
Drawings
FIG. 1 is a flowchart of a hardware virtualization step according to the present invention.
Fig. 2 is a schematic diagram of an intelligent gateway method based on multi-core heterogeneous hardware virtualization according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
The specific implementation process of the invention is as follows: as shown in fig. 1 to 2, an intelligent gateway method based on multi-core heterogeneous hardware virtualization physically divides a multi-core heterogeneous CPU and its peripheral into two hardware partitions by a hardware virtualization method, an intranet operating system and an extranet operating system are respectively installed on the two hardware partitions, the intranet operating system operates an in-vehicle wired gateway function, the extranet operating system operates an out-vehicle wireless gateway function, the operating systems of the two hardware partitions are independent and do not interfere with each other, it can be ensured that the in-vehicle wired gateway is not paralyzed by external attack received by the out-vehicle wireless gateway, driving safety is ensured, the intranet operating system and the extranet operating system perform information interaction through a message hardware unit, a hacker cannot acquire a physical signal of the message hardware unit, thus a message between the two systems cannot be cracked, and information exchange safety of the two systems is ensured, the information interaction is that an intranet operating system and an extranet operating system CAN mutually restart each other as required, the intranet operating system runs a wired gateway which is in communication connection with a CAN/LIN module and an Ethernet module respectively, the extranet operating system runs a wireless gateway which is in communication connection with a mobile network communication module and a V2X module respectively, two physically isolated systems of multi-core heterogeneous hardware virtualization are adopted, the communication safety between networks inside and outside the vehicle is ensured, the wired gateway inside the vehicle cannot be paralyzed due to external attack of the wireless gateway outside the vehicle, and the driving safety is ensured.
The hardware virtualization method operates as follows:
step 1) allocating a CPU core and a memory in an imx8 processor, dividing the CPU into a first partition and a second partition, wherein the CPU of the first partition performs instruction from a memory address 0x80000000, and the CPU of the second partition jumps to a memory address 0xC0000000 for instruction after instruction from 0x80000000, so that a system of the second partition can be operated through the steps; the multi-core heterogeneous processor is based on an NXPimx 8 processor, is provided with a plurality of CPU cores, can divide a part of CPU cores and CPU peripherals into a first partition by a hardware virtualization method, and divide the rest CPU cores and CPU peripherals into a second partition, wherein typical CPU peripherals comprise DDR, EMMC, UART, SPI, USB and the like;
step 2) an outer network operating system and an inner network operating system are respectively installed in a first partition and a second partition, the inner network operating system and the outer network operating system are stored by adopting different EMCC modules, the inner network operating system and the outer network operating system both comprise uboot, kernel and a file system, and a bootloader bootstrap program is installed in the first partition, wherein the bootloader bootstrap program comprises two ARM trust firmware files which are respectively allocated to the first partition and the second partition when the first partition and the second partition are started, so that the system safety is ensured; the bootloader bootstrap program consists of two ARM trust firmware bin files, two uboot bin files and a scu bin file, when the power is on, the bin file in the bootloader is split through the ROM firmware built in the CPU, the first ARM trust firmware and the first uboot are copied to the position of 0x80000000, the second ARM trust firmware and the second uboot are copied to the position of 0xC0000000, the scu bin file is copied to the memory built in the CPU,
step 3) powering on the intelligent gateway system, reading a bootloader bootstrap program from an EMMC module in a first partition by the intelligent gateway system, copying two ARM trust firmware files and uboot to memory addresses 0x80000000 and 0xC0000000 respectively, firstly operating a first CPU core of the first partition, then starting a first CPU core of a second partition, judging which partition is the core in the ARM trust firmware files, if the partition is the first CPU core, jumping to the first ARM trust firmware file address 0x80000000, operating the ARM trust firmware files for peripheral distribution, then jumping to the first uboot, and loading kenerl and a file system of an external network operating system; if the CPU core is the second CPU core, jumping to the address 0xC0000000 of the second ATF to run the second ATF, performing peripheral distribution, then jumping to the second uboot, and loading the kernel and the file system of the second linux system;
step 4), the extranet operating system of the first partition operates a mobile network communication module and a V2X module communication module; the mobile communication module is preferably a 5G communication module, and can realize remote firmware upgrading, remote fault diagnosis and information interaction functions by communicating with an external mobile network through the 5G communication module, and the V2X module can realize information interaction in multiple modes such as vehicle-to-vehicle, man-to-vehicle and vehicle-to-road and realize an auxiliary driving function, which is also an important technology called automatic driving.
Step 5) the external network operating system of the second partition runs the CAN/LIN module and the Ethernet module; the information interaction and routing between different CAN/LIN networks and the information interaction routing between the CAN/LIN and the Ethernet network are realized, the in-vehicle network and the out-vehicle wireless network are physically isolated, and the driving safety is ensured.
Specifically, the intranet operating system and the extranet operating system are linux operating systems.
Specifically, the mobile network communication module is a 5G communication module. The 5G communication module has the characteristics of high information transmission speed, low information communication delay and the like when transmitting information, and is suitable for being used in the field of intelligent gateways.
The operation of the extranet operating system and the intranet operating system can ensure that the extranet operating system and the intranet operating system are independent from each other and do not interfere with each other, the message interaction of the extranet operating system and the intranet operating system support is communicated through a message communication unit inside the processor, a hacker cannot analyze the interaction information between the two systems through external monitoring physical signals, the complexity of the system is reduced through hardware virtualization, and the safety and the reliability of the system are improved.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (3)
1. An intelligent gateway method based on multi-core heterogeneous hardware virtualization is characterized in that a multi-core heterogeneous CPU and peripheral equipment thereof are physically separated into two hardware partitions through the hardware virtualization method, an intranet operating system and an extranet operating system are respectively installed on the two hardware partitions, the intranet operating system and the extranet operating system carry out information interaction through a message hardware unit, the intranet operating system runs a wired gateway and is respectively in communication connection with a CAN/LIN module and an Ethernet module, and the extranet operating system runs a wireless gateway and is respectively in communication connection with a mobile network communication module and a V2X module.
The hardware virtualization method operates as follows:
step 1) allocating a CPU core and a memory in an imx8 processor, dividing the CPU into a first partition and a second partition, wherein the CPU of the first partition performs instruction from a memory address 0x80000000, and the CPU of the second partition jumps to a memory address 0xC0000000 for instruction after instruction from 0x 80000000;
step 2) an outer network operating system and an inner network operating system are respectively installed in a first partition and a second partition, the inner network operating system and the outer network operating system are stored by adopting different EMCC modules, the inner network operating system and the outer network operating system both comprise uboot, kernel and a file system, and a bootloader bootstrap program is installed in the first partition, wherein the bootloader bootstrap program comprises two ARM trust firmware files which are respectively used for peripheral distribution when the first partition and the second partition are started;
step 3) powering on the intelligent gateway system, reading a bootloader bootstrap program from an EMMC module in a first partition by the intelligent gateway system, copying two ARM trust firmware files and uboot to memory addresses 0x80000000 and 0xC0000000 respectively, firstly operating a first CPU core of the first partition, then starting a first CPU core of a second partition, judging which partition is the core in the ARM trust firmware files, if the partition is the first CPU core, jumping to the first ARM trust firmware file address 0x80000000, operating the ARM trust firmware files for peripheral distribution, then jumping to the first uboot, and loading kenerl and a file system of an external network operating system; if the CPU core is the second CPU core, jumping to the address 0xC0000000 of the second ATF to run the second ATF, performing peripheral distribution, then jumping to the second uboot, and loading the kernel and the file system of the second linux system;
step 4), the extranet operating system of the first partition operates a mobile network communication module and a V2X module communication module;
and 5) operating the CAN/LIN module and the Ethernet module by the extranet operating system of the second partition.
2. The intelligent gateway method based on multi-core heterogeneous hardware virtualization according to claim 1, wherein the intranet operating system and the extranet operating system are linux operating systems.
3. The intelligent gateway method based on multi-core heterogeneous hardware virtualization of claim 1, wherein the mobile network communication module is a 5G communication module.
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| CN114840335A (en) * | 2022-04-22 | 2022-08-02 | 北京斯年智驾科技有限公司 | Intelligent gateway controller in automatic driving field and multi-core division strategy thereof |
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