CN115344226B - Screen projection method, device, equipment and medium under virtualization management - Google Patents
Screen projection method, device, equipment and medium under virtualization management Download PDFInfo
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Abstract
The embodiment of the invention provides a screen projection method, a device, equipment and a medium under virtualization management, wherein the method is applied to the same system level chip SOC, the SOC comprises a first operating system domain and a second operating system domain, and the method comprises the following steps: after the power is on, starting each operating system domain through a mirror image file corresponding to each operating system domain in a memory, wherein each operating system domain comprises a kernel simulation program running in a kernel mode; transmitting the captured data to be projected to a preset shared memory through a first operating system domain, and transmitting a remote processing message containing data storage information to a second operating system domain; and reading the data to be screen-projected from the shared memory through the second operating system domain based on the message content of the remote processing message, and projecting the screen of the data to be screen-projected. The isolation and the stability of the system are ensured, the screen projection performance is improved, the hardware cost is controlled, and the screen projection display between the operating systems under the hardware isolation is realized under the condition of zero copy between the operating systems.
Description
Technical Field
The invention relates to the technical field of virtualization, in particular to a screen projection method, device, equipment and medium under virtualization management.
Background
With the rapid development of vehicle technology, the vehicle-mounted display equipment is switched by means of the screen projection function of the vehicle according to different use requirements of users.
In the traditional intelligent cockpit solution, the implementation schemes of the screen projection function of the automobile are different, for example, the desktop screen projection between independent SOCs is realized based on a network, the navigation screen projection between containers is realized based on an LXC (Linux Container), and the application screen projection between virtual machines is realized based on a Hypervisor.
The desktop screen projection scheme between the independent SOC is realized based on the network, and the screen projection quality is seriously influenced by the network bandwidth and delay; the intelligent cabin solution realized based on the LXC is limited by poor isolation of an instrument system; the application screen projection scheme between the virtual machines based on Hypervisor requires high SOC hardware performance.
Disclosure of Invention
The embodiment of the invention provides a screen projection method, a screen projection device, a vehicle and a medium under virtualization management, which are used for realizing screen projection between systems under SOC hardware isolation.
In a first aspect, the present embodiment provides a screen projection method under virtualization management, which is applied to a same system on a chip SOC that includes a first operating system domain and a second operating system domain, and the method includes:
after the power is on, starting each operating system domain through a mirror image file corresponding to each operating system domain in a memory, wherein each operating system domain comprises a kernel simulation program running in a kernel mode;
transmitting the captured data to be screen-shot to a pre-configured shared memory through the first operating system domain, and transmitting a remote processing message containing data storage information to the second operating system domain, wherein the shared memory comprises at least one reserved memory area;
and reading the data to be screen-projected from the shared memory based on the message content of the remote processing message through the second operating system domain, and projecting the screen of the data to be screen-projected.
In a second aspect, the present embodiment provides a screen projection apparatus under virtualization management, which is applied to a same system on a chip SOC, where the SOC includes a first operating system domain and a second operating system domain, and the apparatus includes:
the power-on starting module is used for starting each operating system domain through a mirror image file corresponding to each operating system domain in a memory after power-on, and each operating system domain comprises a kernel simulation program running in a kernel mode;
the information transmission module is used for transmitting the captured data to be projected to a preset shared memory through the first operating system domain and transmitting a remote processing message containing data storage information to the second operating system domain, wherein the shared memory comprises at least one reserved memory area;
and the screen projection module is used for reading the data to be projected from the shared memory based on the message content of the remote processing message through the second operating system domain and projecting the screen of the data to be projected.
In a third aspect, the present embodiment provides an electronic device, including:
at least one system-on-chip SOC including a first operating system domain and a second operating system domain thereon; and
a memory communicatively coupled to the at least one SOC;
wherein the content of the first and second substances,
the memory stores a computer program executable by the SOC, the computer program being executed by the SOC to enable the SOC to execute the screen projection method under virtualization management as described in the embodiments of the present invention.
In a fourth aspect, this embodiment provides a computer-readable storage medium, where computer instructions are stored, and the computer instructions are configured to, when executed, cause a processor to implement a screen projection method under virtualization management according to any embodiment of the present invention.
The embodiment of the invention provides a screen projection method, a device, equipment and a medium under virtualization management, wherein the method is applied to the same system level chip SOC, the SOC comprises a first operating system domain and a second operating system domain, and the method comprises the following steps: after the power-on, starting each operating system domain through a mirror image file corresponding to each operating system domain in the memory, wherein each operating system domain comprises a kernel simulation program running in a kernel mode; transmitting the captured data to be screen-shot to a pre-configured shared memory through a first operating system domain, and transmitting a remote processing message containing data storage information to a second operating system domain; and reading the data to be screen-projected from the shared memory through the second operating system domain based on the message content of the remote processing message, and projecting the screen of the data to be screen-projected. The isolation and the stability of the system are ensured, the screen projection performance is improved, the hardware cost is controlled, and the screen projection display between the operating systems under the hardware isolation is realized under the condition of zero copy between the operating systems.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a screen projection method under virtualization management according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a screen projection method under virtualization management according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a screen projection method under virtualization management according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a screen projection apparatus under virtualization management according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "original", "target", and the like in the description and claims of the present invention and the drawings described above are used for distinguishing similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a flowchart of a screen projection method under virtualization management according to an embodiment of the present invention, where the method is applicable to a screen projection situation between multiple systems under hardware isolation, and the method can be executed by a screen projection device under virtualization management, where the screen projection device under virtualization management can be implemented in hardware and/or software, and the device can be configured in an electronic device.
The method is applied to the same system-on-chip SOC, and the SOC comprises a first operating system domain and a second operating system domain.
As shown in fig. 1, a screen projection method under virtualization management provided in this embodiment may specifically include the following steps:
and S110, after the power is on, starting each operating system domain through the image file corresponding to each operating system domain in the memory, wherein each operating system domain comprises a kernel simulation program which runs in a kernel mode.
In this embodiment, the first os domain may be understood as a block that is formed by dividing devices in the vehicle according to different functions and can control an external device corresponding to the central console to implement a function corresponding to the central console. The second os domain may be understood as a block that is formed by dividing devices in the vehicle according to different functions and is capable of controlling external devices corresponding to the dashboard to implement functions corresponding to the dashboard. An image file may be understood as a copy file of data of its corresponding operating system domain. A kernel simulation program may be understood as a program for simulating a kernel to which an SOC is assigned for an operating system domain.
Specifically, after the system is powered on and started, the boot program may load the image files of the first operating system domain and the second operating system domain into the memory of the system, where the memory may be a DDR, and the two systems are respectively started. After the first operating system domain is started, the memory module, the scheduling module and each driver module corresponding to the first operating system domain, such as a WIFI module, a sound module, a disk module, a Bluetooth module and the like, are initialized, and a kernel simulation program running in a kernel mode is started. After the second operating system domain is started, the corresponding memory module, the scheduling module and each driver module can be initialized, and the kernel simulation program running in the kernel mode is started.
And S120, transmitting the captured data to be projected to a preset shared memory through the first operating system domain, and transmitting a remote processing message containing data storage information to the second operating system domain, wherein the shared memory comprises at least one reserved memory area.
It should be noted that, the second operating system domain and the first operating system domain under the SOC hardware isolation cannot directly perform data interaction, and data interaction may be implemented by using a shared area accessible to each system domain.
In this embodiment, the data to be projected can be understood as data corresponding to a picture that requires the meter control domain to project a screen. Shared memory is understood to be memory that is accessible to multiple systems under hardware isolation. The data storage information may be understood to include address information of a shared memory storing the data to be projected. A remote process message may be understood as a message used to communicate data storage information between two operating systems.
Specifically, the first operating system domain may determine a memory area that may be used as the shared memory in the device tree, form shared memory information, and synchronize the shared memory information to the instrument control domain, so that the instrument control domain determines information such as a location, an address, an ID, and a memory size corresponding to the shared memory. The system can identify different pictures to be projected, distinguish the pictures to be projected, and determine whether to project the screen locally or send the pictures to other equipment for projection. The display service of the first operating system domain can capture a screen projection picture needing screen projection in the instrument control domain, transmit corresponding to-be-projected screen data to an idle position in the shared memory, form corresponding data storage information, form remote processing information of the data storage information through a corresponding information transmission mechanism and transmit the remote processing information to the instrument control system domain, the information transmission mechanism is preferably RPMsg, and the storage position of the to-be-projected screen data in the instrument control system domain is informed through the remote processing information.
Illustratively, a navigation program of a first operating system domain needs to be projected to an instrument control domain, the first operating system domain can capture data to be projected corresponding to a picture to be projected of the navigation program, the first operating system domain polls a shared memory, finds that an area with an ID of 2 in the shared memory is free, and can transmit the data to be projected to the area with the ID of 2 in the shared memory, and form a remote processing message through an RPMsg to inform the instrument control system domain of the information with the ID of 2, and inform the instrument control system domain that the data to be projected are stored in the area with the ID of 2 in the shared memory.
And S130, reading the data to be screen-projected from the shared memory based on the message content of the remote processing message through the second operating system domain, and projecting the screen of the data to be screen-projected.
Specifically, after receiving the remote processing message for storing the to-be-projected screen data transmitted by the first operating system domain, the second operating system domain parses the remote processing message, and can map out a physical address of a corresponding storage position based on the message content of the remote processing message, that is, determine the position of the to-be-projected screen data stored in the shared memory, read the to-be-projected screen data in the storage position in the shared memory, synthesize a to-be-projected screen corresponding to the to-be-projected screen data with an instrument screen corresponding to the second operating system domain to obtain a final screen projection picture, transmit the final screen projection picture to the corresponding external display device, and display the final screen projection picture through the external display device corresponding to the second operating system domain.
The embodiment of the invention provides a screen projection method under virtualization management, which is applied to the same system level chip SOC, wherein the SOC comprises a first operating system domain and a second operating system domain, and the method comprises the following steps: after the power is on, starting each operating system domain through a mirror image file corresponding to each operating system domain in a memory, wherein each operating system domain comprises a kernel simulation program running in a kernel mode; the method comprises the steps that captured screen data to be projected are transmitted to a preset shared memory through a first operating system domain, remote processing information containing data storage information is transmitted to a second operating system domain, and the shared memory comprises at least one reserved memory area; and reading the data to be screen-projected from the shared memory through the second operating system domain based on the message content of the remote processing message, and projecting the screen of the data to be screen-projected. By using the method, the data to be projected is transmitted from the first operating system domain to the second operating system domain through the shared memory, and the data is projected and displayed in the second operating system domain. The isolation and the stability of the system are ensured, the screen projection performance is improved, the hardware cost is controlled, and the screen projection display between the operating systems under the hardware isolation is realized under the condition of zero copy between the operating systems.
As a first optional embodiment of the first embodiment, after controlling the second operating system domain to read the data to be screen-projected in the shared memory, and performing screen projection on the data to be screen-projected, further optimizing includes:
and through the first operating system domain, resource release is carried out on the shared memory for storing the data to be projected.
Specifically, after the second operating system domain casts the screen of the data to be screened, the storage position information corresponding to the screened data can be transmitted back to the first operating system domain to inform the first operating system domain that the screen casting data corresponding to the storage position information is sent and displayed, and the first operating system domain can be controlled to release the data stored in the shared memory corresponding to the storage position information after receiving the storage position information, so that the storage position in the shared memory is in an idle state.
Further, the specific step of controlling the first operating system domain to release the resource of the shared memory for storing the screen projection data is as follows:
and a1, receiving a remote response message which is transmitted by a second operating system domain and contains data storage information corresponding to the data to be projected.
In this embodiment, the remote response message may be understood as a message for informing the first os field of the projected data storage location.
Specifically, after the second operating system domain casts the screen of the data to be cast, the second operating system domain can be controlled to transmit the data storage information of the data to be cast which has been cast in the screen to the first operating system domain in the form of a remote response message, so as to inform the first operating system domain that the screen casting data associated with the sub-area information has been sent and displayed. And the first operating system domain receives a remote response message which is transmitted by the second operating system domain and contains data storage information corresponding to the data to be projected.
For example, if the second operating system domain has performed screen projection and display on the data to be projected in the sub-domain with ID 3 in the shared memory, the ID: and 3, forming sub-region information and transmitting the sub-region information to the first operating system region in the form of a response message to inform that screen projection data in the sub-region with the ID of the first operating system region being 3 are sent and displayed.
b1, according to the remote response message, determining a reserved memory area to be released from each reserved memory area contained in the shared memory, and releasing the reserved memory area to be released.
In this embodiment, the reserved memory area may be understood as a plurality of areas formed by dividing the shared memory. The reserved memory area to be released can be understood as a reserved memory area in which the screen projection data is already transmitted and displayed.
Specifically, the first operating system domain may be controlled to analyze the remote response message to obtain the data storage information included in the remote response message, and since each reserved memory region corresponds to a different ID, the remote response message may be searched in each reserved memory region included in the shared memory according to the ID information in the data storage information to determine the reserved memory region corresponding to the ID information, and the reserved memory region is the reserved memory region to be released, and the first operating system domain may be controlled to release the memory of the reserved memory region to be released, and empty the screen data to be projected in the reserved memory region.
In the first optional embodiment of this embodiment, the sub-area information corresponding to the screen-projected data is transmitted to the first operating system domain through the instrument control domain, and the first operating system domain is controlled to perform memory release on the reserved memory area for storing the screen-projected data, so that the reserved memory area corresponding to the screen-projected data is automatically released, resource occupation of useless data is avoided, timeliness of memory release is guaranteed, stability of the system is improved, and screen-projecting performance is effectively improved.
As a second optional embodiment of the first embodiment, on the basis of the above steps, further optimization includes:
and a2, performing shared memory allocation through the first operating system domain based on the reserved memory configuration information acquired from the equipment tree, and packaging the configured shared memory information into a memory negotiation message to be transmitted to the second operating system domain.
In this embodiment, the device tree may be understood as a tree for storing information of each device connected to the first operating system domain. The reserved memory configuration information may be understood to include information such as the size, address, etc. of the memory. The shared memory information may be understood as information such as a size and an address corresponding to each partition in the shared memory. A memory negotiation message may be understood as a form of transferring information in a network.
Specifically, the first operating system domain may read the local device tree, obtain a memory device that may serve as a shared memory in the local device, and obtain reserved memory configuration information corresponding to the memory device, where the reserved memory configuration information may include information such as a memory address and a memory size of the memory device. The first operating system domain may divide the area corresponding to the shared memory, and may divide the area into a plurality of reserved memory areas. The ID information may be allocated to the divided reserved memory areas, information such as the ID information, the initial physical address, and the memory size corresponding to each reserved memory area may be acquired, and the information may be used as the shared memory information corresponding to each reserved memory area and locally stored. And packaging the shared memory information into a memory negotiation message form, and transmitting the memory negotiation message form to the second operating system domain.
Further, based on the reserved memory configuration information obtained from the device tree, shared memory allocation is performed, and the configured shared memory information is encapsulated as a memory negotiation message and transmitted to the second operating system domain, which may include:
and a21, performing region division on the shared memory according to the reserved memory configuration information to obtain at least one reserved memory region.
Specifically, the first operating system domain may divide the area corresponding to the shared memory according to the information, such as the memory address and the memory size, of the shared memory device included in the reserved memory configuration information, divide the area into a plurality of reserved memory areas, and obtain at least one reserved memory area.
Illustratively, the first operating system domain is controlled to divide the memory area into three reserved memory areas, the initial physical address corresponding to the reserved memory area with the ID of 1, 2 and 3 respectively, the memory size can be Z1, and the information of the sub-area corresponding to the reserved memory area 1 is ID 1, W1 and Z1; the initial physical address corresponding to the reserved memory area with the ID of 2 can be W2, the memory size can be Z2, and the sub-area information corresponding to the reserved memory area 2 is ID 2, W2 and Z2; the initial physical address corresponding to the reserved memory area with ID 3 may be W3, and the memory size may be Z3, and then the information of the sub-area corresponding to the reserved memory area 3 is ID:3, W3, and Z3.
and a22, taking the sub-region information of each reserved memory region in the shared memory as the shared memory information.
Specifically, the first operating system domain may be controlled to allocate ID information to the divided reserved memory areas, obtain information such as ID information, a starting physical address, and a memory size corresponding to each reserved memory area, use the information as information of each sub area corresponding to each reserved memory area, and locally store the information of each sub area as shared memory information.
and a23, packaging the shared memory information into a memory negotiation message and transmitting the memory negotiation message to the second operating system domain.
Specifically, the shared memory information is encapsulated into a memory negotiation message, and the shared memory information is transmitted to the second operating system domain in the memory negotiation message.
And b2, analyzing the memory negotiation message through the second operating system domain to obtain shared memory information, and sending a response message to the first operating system domain.
In this embodiment, the reply message may be understood as information for informing that the first operating system domain successfully receives the negotiation message.
Specifically, after receiving the memory negotiation message sent by the first operating system domain, the second operating system domain analyzes the memory negotiation message to obtain shared memory information therein, locally stores the shared memory information, and sends a response message to the first operating system domain to inform the first operating system domain that the memory negotiation message is successfully received.
Further, the memory negotiation message is analyzed to obtain shared memory information, and a response message is sent to the first operating system domain, and the specific steps may include:
and b21, receiving the memory negotiation message by creating a kernel thread.
In this embodiment, the kernel thread may be understood as a thread used for the second os domain and the first os domain to transmit the information related to the shared memory.
Specifically, the second os domain has the characteristics of high start efficiency and high start speed, and may be controlled to create a kernel thread for performing shared memory negotiation between the second os domain and the first os domain after the second os domain is started, so that the second os domain may receive the memory negotiation packet sent by the first os domain through the kernel thread.
b22, analyzing the memory negotiation message, and obtaining the shared memory information for local storage.
Specifically, after receiving the memory negotiation message sent by the first operating system domain through the kernel thread, the second operating system domain analyzes the memory negotiation message to obtain shared memory information therein, and locally stores the shared memory information.
And c3, sending a response message to the first operating system domain to determine that the memory negotiation message is successfully received.
Specifically, the second operating system domain may generate a response message after obtaining and locally storing the sub-region information, and send the response message to the first operating system domain to notify that the first operating system domain successfully receives the negotiation message.
In a second optional embodiment of this embodiment, a kernel thread is established through a second operating system domain, the first operating system domain selects a shared memory and divides the reserved memory areas, obtains sub-area information corresponding to each reserved memory area, performs local storage, assembles the sub-area information into a negotiation packet, and sends the negotiation packet to the second operating system domain, and the second operating system domain receives the negotiation packet through the kernel thread and performs local storage. The configuration of the shared memory capable of carrying out data transmission between the two systems is realized, and the hardware equipment capable of carrying out data interaction is provided for each system under the condition of hardware isolation.
Example two
Fig. 2 is a schematic flow chart of a screen projection method under virtualization management according to a second embodiment of the present invention, which is a further optimization of the second embodiment. As shown in fig. 2, the second embodiment provides a screen projection method under virtualization management, which specifically includes the following steps:
s201, after the power is on, starting each operating system domain through the mirror image files corresponding to each operating system domain in the memory, wherein each operating system domain comprises a kernel simulation program which runs in a kernel mode.
S202, judging whether a free reserved memory area exists in the shared memory.
In this embodiment, the free reserved memory area may be understood as a reserved memory area where no to-be-projected-screen data is stored.
Specifically, when the first operating system domain captures the data to be projected onto the screen, the first operating system domain may be controlled to poll each reserved memory area included in the shared memory, and determine whether there is a free reserved memory area in the shared memory.
For example, the first operating system domain may poll each reserved memory area in the shared memory, first determine the memory usage of the reserved memory area with ID 1, and determine that the reserved memory area is not idle if the reserved memory area is found to have memory usage, where the data to be screen-cast is already in progress, and no other data to be screen-cast may be stored. And then judging the memory occupation condition of the reserved memory area with the ID of 2, and judging that the reserved memory area is idle if no memory occupation is found.
And S203, if so, transmitting the data to be projected to the idle reserved memory area, and acquiring data storage information corresponding to the idle reserved memory area.
Specifically, after the polling judgment, it is determined that the polled first idle reserved memory area is an idle reserved memory area, the first operating system domain may be controlled to store the captured data to be projected into the idle reserved memory area, and information corresponding to the idle reserved memory area is acquired as data storage information.
Illustratively, the shared memory comprises 3 reserved memory areas, the reserved memory areas with the IDs of 1, 2 and 3 are respectively not idle, the reserved memory areas with the IDs of 2 and 3 are idle, the polled first idle reserved memory area, namely the reserved memory area with the ID of 2 is used as an idle reserved memory area, the data to be projected is stored in the idle reserved memory area, and the ID information 2 corresponding to the idle reserved memory area is obtained as data storage information.
And S204, if not, suspending the capturing thread corresponding to the data to be projected until a free reserved memory area exists.
Specifically, after the first operating system domain performs polling judgment on all reserved memory areas in the shared memory, and no reserved memory area is idle, that is, all reserved memory areas store screen data to be projected, the first operating system domain is controlled to suspend the capture thread corresponding to the screen data to be projected until the first operating system domain judges that an idle reserved memory area exists in the shared memory, and then the suspended screen data to be projected is stored in the idle reserved memory area.
S205, the remote processing message containing the data storage information is transmitted to the second operating system domain.
S206, according to the message content of the remote processing message, determining a target reserved memory area from each reserved memory area contained in the shared memory, and reading the data to be projected in the target reserved memory area.
In this embodiment, the target reserved memory area may be understood as a reserved memory area for storing the to-be-projected-screen data to be projected.
Specifically, the second operating system domain may be controlled to receive the remote processing message sent by the first operating system domain, analyze the remote processing message, and obtain ID information included in the data storage message, and because each ID is associated with a physical address of the reserved memory area corresponding to the ID, the physical address of the target reserved memory area may be mapped through the ID, and further a virtual address of the target reserved memory area is mapped, that is, the target reserved memory area is determined from each reserved memory included in the shared memory, and the second operating system domain may be controlled to read the to-be-screened data in the target reserved memory area according to the virtual address.
And S207, synthesizing the data to be projected with the received instrument data to obtain a screen projection picture.
In this embodiment, the screen projection picture may be understood as a picture obtained after the hardware composition layer is passed.
Specifically, the second operating system domain reads the data to be screen-projected, and may control the second operating system domain to synthesize the picture to be screen-projected corresponding to the data to be screen-projected and the picture of the second operating system domain in a places-only manner, so as to obtain the screen-projected picture.
And S208, projecting the screen projection picture.
Specifically, the second operating system domain may be controlled to project the screen projection image to a display device connected to the second operating system domain, and the screen projection image is displayed through the display device.
In the screen projection method under virtualization management provided by the second embodiment, when the first operating system domain captures the data to be screen projected, it may be determined whether there is a free reserved memory area in the shared memory, and if so, the data is directly stored, and if not, the capture thread may be temporarily suspended, so that no conflict is generated in the storage process, the stability of the system is improved, and further, the accuracy of the instrument control domain in subsequently acquiring the screen projection data is ensured. The first operating system domain is controlled to transmit the sub-region information to the second operating system domain, the second operating system domain analyzes the sub-region information so as to read the data to be projected for picture synthesis, and then screen projection is achieved, only the sub-region information is transmitted, and the goal of zero copy in the screen projection process is achieved. The isolation and the stability of the system are ensured, the screen projection performance is improved, the hardware cost is controlled, and screen projection display between the operating systems under the hardware isolation is realized.
In order to more clearly describe the embodiment of the present invention, the first os domain is divided into three reserved memory areas, which are described from the perspective of the first os domain and the perspective of the second os domain. Fig. 3 is a flowchart illustrating a screen-casting method under virtualization management according to a second embodiment of the present invention. As shown in fig. 3, the screen-casting step under virtualization management can be expressed as:
s1, electrifying and starting, wherein a boot system loads mirror images of two operating system domains, and starts the two operating system domains;
s2, starting a second operating system domain;
s3, creating a kernel thread;
s4, receiving the memory negotiation message through the kernel thread, and analyzing the memory negotiation message to obtain shared memory information;
s5, sending a response message, and locally storing shared memory information;
s6, reading the data to be projected of the target reserved memory area associated with the remote processing message;
s7, synthesizing a screen projection picture and a picture of a second operating system domain through the planes-only;
s8, sending the data storage information of the screen shot through a remote response message, and informing a first operating system domain that the data to be shot in the reserved memory area is the screen shot;
s9, starting a first operating system domain;
s10, dividing three reserved memory areas as a shared memory;
s11, assembling shared memory information of each reserved memory area into a memory negotiation message, and sending the memory negotiation message to a second operating system domain;
s12, locally storing shared memory information;
s13, capturing data to be projected;
s14, judging whether the shared memory is reserved in an idle memory area or not, and if so, jumping to S15; if not, jumping to S17;
s15, storing the screen data to be projected into an idle reserved memory area, and acquiring data storage information (such as ID information) corresponding to the idle reserved memory area;
s16, transmitting the remote processing message containing the data storage information to a second operating system domain;
s17, suspending a capturing thread corresponding to the data to be projected until a spare reserved memory area exists;
and S18, releasing the reserved memory area to be released under the remote response message.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a screen projection apparatus under virtualization management according to a third embodiment of the present invention, which is applicable to a screen projection situation between multiple systems under hardware isolation. As shown in fig. 4, the apparatus includes: a power-on start module 31, an information transfer module 32, and a screen projection module 33, wherein,
a power-on starting module 31, configured to start each operating system domain through a mirror image file corresponding to each operating system domain in the memory after power-on, where each operating system domain includes a kernel simulation program running in a kernel mode;
the information transmission module 32 is configured to transmit the captured to-be-projected-screen data to a preconfigured shared memory through a first operating system domain, and transmit a remote processing message including data storage information to a second operating system domain, where the shared memory includes at least one reserved memory area;
and a screen projection module 33, configured to read, through the second operating system domain, the data to be projected from the shared memory based on the message content of the remote processing message, and project the screen of the data to be projected.
The third embodiment of the invention provides a screen projection device under virtualization management, which is applied to the same system level chip SOC, wherein the SOC comprises a first operating system domain and a second operating system domain, after being electrified, each operating system domain is started through a mirror image file corresponding to each operating system domain in a memory, and each operating system domain comprises a kernel simulation program running in a kernel mode; transmitting the captured data to be projected to a preset shared memory through a first operating system domain, and transmitting a remote processing message containing data storage information to a second operating system domain; and reading the data to be screen-projected from the shared memory through the second operating system domain based on the message content of the remote processing message, and projecting the screen of the data to be screen-projected. The isolation and the stability of the system are ensured, the screen projection performance is improved, the hardware cost is controlled, and the screen projection display between the operating systems under the hardware isolation is realized under the condition of zero copy between the operating systems.
Preferably, the information transfer module 32 is specifically configured to:
judging whether a free reserved memory area exists in the shared memory;
if so, transmitting the data to be projected to the idle reserved memory area, and acquiring sub-area information corresponding to the idle reserved memory area;
and if not, suspending the capturing thread corresponding to the data to be projected until a spare reserved memory area is available.
Preferably, the screen projection module 33 is specifically configured to:
determining a target reserved memory area from each reserved memory area contained in the shared memory according to the message content of the remote processing message, and reading the data to be projected in the target reserved memory area;
synthesizing the data to be projected with the received instrument data to obtain a screen projection picture;
and projecting the screen of the screen projection picture.
Preferably, the apparatus further comprises:
the transmission module is used for carrying out shared memory allocation through the first operating system domain based on the reserved memory configuration information acquired from the equipment tree, and packaging the configured shared memory information into a memory negotiation message to be transmitted to the second operating system domain;
and the sending module is used for analyzing the memory negotiation message through the second operating system domain, obtaining shared memory information and sending a response message to the first operating system domain.
Further, the transmission module is specifically configured to:
according to the reserved memory configuration information, performing region division on the shared memory to obtain at least one reserved memory region;
taking the sub-region information of each reserved memory region in the shared memory as shared memory information;
and packaging the shared memory information into a memory negotiation message and transmitting the memory negotiation message to the second operating system domain.
Further, the sending module is specifically configured to:
receiving a memory negotiation message through the created kernel thread;
analyzing the memory negotiation message, and obtaining shared memory information for local storage;
and sending a response message to the first operating system domain to determine that the memory negotiation message is successfully received.
Preferably, the device reads the data to be projected from the shared memory, and after the data to be projected is projected, the device further includes:
and the release module is used for releasing resources of the shared memory for storing the data to be projected through the first operating system domain.
Further, the release module is specifically configured to:
receiving a remote response message which is transmitted by a second operating system domain and contains data storage information corresponding to the data to be projected;
and according to the remote response message, determining the reserved memory area to be released from each reserved memory area contained in the shared memory, and releasing the reserved memory area to be released.
The screen projection device under virtualization management provided by the embodiment of the invention can execute the screen projection method under virtualization management provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
FIG. 5 illustrates a schematic diagram of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the electronic device 10 includes at least one system on a chip SOC11, the SOC11 includes a first operating system domain and a second operating system domain thereon, and a memory communicatively connected to the at least one SOC11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the SOC11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The SOC11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to the bus 14.
A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The SOC11 executes the respective methods and processes described above, such as a screen projection method under virtualization management.
In some embodiments, the screen projection method under virtualization management may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by SOC11, one or more steps of the screen projection method under virtualization management described above may be performed. Alternatively, in other embodiments, SOC11 may be configured to perform the screen-casting method under virtualization management by any other suitable means (e.g., by way of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a first component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, first, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A screen projection method under virtualization management is applied to the same system-on-chip (SOC), wherein the SOC comprises a first operating system domain and a second operating system domain, and the method comprises the following steps:
after the power is on, starting each operating system domain through a mirror image file corresponding to each operating system domain in a memory, wherein each operating system domain comprises a kernel simulation program running in a kernel mode;
transmitting the captured data to be projected to a preset shared memory through the first operating system domain, and transmitting a remote processing message containing data storage information to the second operating system domain, wherein the shared memory comprises at least one reserved memory area;
reading the data to be screen-projected from the shared memory based on the message content of the remote processing message through the second operating system domain, and projecting the screen of the data to be screen-projected;
the kernel simulation program is a program used for simulating kernels distributed to the operating system domains by the SOC;
the method for transmitting the captured data to be projected to the pre-configured shared memory comprises the following steps:
judging whether a free reserved memory area exists in the shared memory;
if so, transmitting the screen data to be projected to the idle reserved memory area, and acquiring data storage information corresponding to the idle reserved memory area;
if not, suspending the capturing thread corresponding to the data to be screen-shot until a free reserved memory area exists;
the reading the data to be screen-projected from the shared memory and the screen-projecting the data to be screen-projected include:
according to the message content of the remote processing message, determining a target reserved memory area from each reserved memory area contained in the shared memory, and reading the data to be projected in the target reserved memory area;
synthesizing the screen to be projected corresponding to the screen to be projected data and the screen of the second operating system domain in a places-only mode to obtain a screen projection screen;
and projecting the screen projection picture.
2. The method of claim 1, further comprising:
through the first operating system domain, based on the reserved memory configuration information obtained from the device tree, shared memory allocation is carried out, and the configured shared memory information is packaged into a memory negotiation message and transmitted to the second operating system domain;
and analyzing the memory negotiation message through the second operating system domain to obtain shared memory information, and sending a response message to the first operating system domain.
3. The method according to claim 2, wherein the performing shared memory allocation based on the reserved memory configuration information obtained from the device tree, and encapsulating the configured shared memory information into a memory negotiation packet to be transmitted to the second operating system domain comprises:
according to the reserved memory configuration information, performing region division on the shared memory to obtain at least one reserved memory region;
taking the sub-region information of each reserved memory region in the shared memory as shared memory information;
and packaging the shared memory information into a memory negotiation message and transmitting the memory negotiation message to the second operating system domain.
4. The method of claim 2, wherein the parsing the memory negotiation packet, obtaining shared memory information, and sending a response packet to the first operating system domain comprises:
receiving the memory negotiation message through the created kernel thread;
analyzing the memory negotiation message, and obtaining the shared memory information for local storage;
and sending a response message to the first operating system domain to determine that the memory negotiation message is successfully received.
5. The method of claim 1, wherein after reading the data to be projected from the shared memory and projecting the screen of the data to be projected, the method further comprises:
and through the first operating system domain, resource release is carried out on the shared memory for storing the data to be projected.
6. The method according to claim 5, wherein the releasing the resources of the shared memory storing the data to be screen-cast comprises:
receiving a remote response message which is transmitted by the second operating system domain and contains data storage information corresponding to the data to be projected;
and according to the remote response message, determining a reserved memory area to be released from each reserved memory area contained in the shared memory, and releasing the reserved memory area to be released.
7. A screen projection device under virtualization management is applied to the same system-on-chip (SOC), wherein the SOC comprises a first operating system domain and a second operating system domain, and the device comprises:
the power-on starting module is used for starting each operating system domain through the image file corresponding to each operating system domain in the memory after power-on, and each operating system domain comprises a kernel simulation program running in a kernel mode;
the information transmission module is used for transmitting the captured data to be projected to a preset shared memory through the first operating system domain and transmitting a remote processing message containing data storage information to the second operating system domain, wherein the shared memory comprises at least one reserved memory area;
the screen projection module is used for reading the data to be projected from the shared memory based on the message content of the remote processing message through the second operating system domain and projecting the screen of the data to be projected;
the kernel simulation program is a program used for simulating kernels distributed to the operating system domains by the SOC;
the information transmission module is specifically used for:
judging whether a free reserved memory area exists in the shared memory;
if so, transmitting the screen data to be projected to the idle reserved memory area, and acquiring data storage information corresponding to the idle reserved memory area;
if not, suspending the capturing thread corresponding to the data to be projected until a spare reserved memory area is available;
wherein, throw the screen module, specifically be used for:
according to the message content of the remote processing message, determining a target reserved memory area from each reserved memory area contained in the shared memory, and reading the data to be projected in the target reserved memory area;
synthesizing the screen to be projected corresponding to the screen to be projected data and the screen of the second operating system domain in a places-only mode to obtain a screen projection screen;
and projecting the screen of the screen projection picture.
8. An electronic device, characterized in that the electronic device comprises:
at least one system-on-chip (SOC), wherein the SOC comprises a first operating system domain and a second operating system domain; and
a memory communicatively coupled to the at least one SOC;
wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one SOC to enable the at least one SOC to perform the method of screen projection under virtualization management of any of claims 1-6.
9. A computer-readable storage medium storing computer instructions for causing an SOC to implement the screen projection method under virtualization management of any one of claims 1-6 when executed.
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| CN115904602B (en) * | 2023-02-23 | 2024-01-26 | 南京芯驰半导体科技有限公司 | Multi-window projection method and system applied to multi-operating system and vehicle |
| CN116828242B (en) * | 2023-08-30 | 2023-12-05 | 亿咖通(湖北)技术有限公司 | Method, system and storage medium for long link screen projection |
| CN116932454A (en) * | 2023-09-15 | 2023-10-24 | 湖北芯擎科技有限公司 | Data transmission method, device, electronic equipment and computer readable storage medium |
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