CN114461451A - A PCI device hot restart method, system and related components - Google Patents

Abstract

The present application discloses a method, system, device and computer-readable storage medium for hot restarting a PCI device. The method for hot restarting a PCI device includes: acquiring a GPIO state value of a PCI slot of each bandwidth used for performing a hot restart operation; The state value determines the output state value of each GPIO signal interface; controls each GPIO signal interface to output the GPIO signal according to the corresponding output state value, and delays the preset time to make the PCI device connected to the PCI slot of each bandwidth restart hot . In the present application, the GPIO signal interface of the ARM processor is physically connected with the Reset signal interface of the PCI slot of x16 bandwidth, and the hot restart of PCI devices of different bandwidths can be realized through the GPIO signals output by each GPIO signal interface.

Description

A PCI device hot restart method, system and related components

technical field

The present application relates to the field of servers, and in particular, to a method, system and related components for hot restarting of a PCI device.

Background technique

At present, the PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus is the most used in server products. PCI devices mounted on the PCI bus include but are not limited to PCI standard network cards, PCI standard NVME (Non Volatile Memory Express). , non-volatile memory host controller interface specification) hard disk, PCIE (Peripheral Component Interconnect Express, high-speed serial computer expansion bus standard) standard memory card and so on. These PCI devices need to perform a corresponding hot restart operation when the system is hot restarted, so that the PCI device driver can be obtained again during the server startup process and can be used normally. In order to improve the hot restart efficiency of the PCI device, the hardware engineer When designing server products, a systemReset signal is used to support the hot restart function of all PCI devices. However, in the emerging ARM (Advanced RISC Machine, the first RISC microprocessor with low power consumption and cost designed by British Acorn Co., Ltd.) server field, the chip design does not have this systemReset signal, and the above method cannot support the hot restart of PCI devices. Function.

Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a method, system, device and computer-readable storage medium for hot restarting of PCI devices, which physically connect the GPIO signal interface of the ARM processor with the Reset signal interface of the PCI slot of the x16 bandwidth, through each GPIO The GPIO signal output by the signal interface can realize the hot restart of PCI devices with different bandwidths.

In order to solve the above-mentioned technical problems, the present application provides a method for hot restarting a PCI device, which is applied to an ARM motherboard. The ARM motherboard is provided with an ARM processor and PCI slots of various bandwidths, and a plurality of GPIO signals of the AMR processor are provided. The interface is connected with the Reset signal interface of the PCI slot of the x16 bandwidth, and the PCI device hot restart method includes:

Obtain the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation;

Determine an output state value of each of the GPIO signal interfaces according to the GPIO state value;

Each of the GPIO signal interfaces is controlled to output the GPIO signal according to the corresponding output state value, and the preset time is delayed, so that the PCI device connected to the PCI slot of each bandwidth is hot restarted.

Optionally, the process of obtaining the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation includes:

According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, determine a GPIO state value of the PCI slot of each bandwidth for performing a warm restart operation.

Optionally, the process of determining the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs includes:

According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, select a preset state value table;

The GPIO state value of the PCI slot of each bandwidth for performing a warm restart operation is obtained from the preset state value table.

Optionally, the number of the GPIO signal interfaces is four.

Optionally, after the delay preset time, the method for hot restarting the PCI device further includes:

Control each of the GPIO signal interfaces to output a GPIO signal according to a high state value.

Optionally, before obtaining the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation, the PCI device hot restart method further includes:

When the ARM main board is powered on, each of the GPIO signal interfaces is controlled to output a GPIO signal according to a high state value.

Optionally, the process of controlling each of the GPIO signal interfaces to output GPIO signals according to their corresponding output state values includes:

Control each of the GPIO signal interfaces simultaneously or sequentially to output GPIO signals according to their corresponding output state values.

In order to solve the above technical problems, the present application also provides a PCI device hot restart system, which is applied to an ARM motherboard. The ARM motherboard is provided with an ARM processor and PCI slots of various bandwidths. The signal interface is connected to the Reset signal interface of the PCI slot of the x16 bandwidth, and the PCI device hot restart system includes:

an acquisition module for acquiring the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation;

a determining module, configured to determine the output state value of each of the GPIO signal interfaces according to the GPIO state value;

The control module is configured to control each of the GPIO signal interfaces to output GPIO signals according to their corresponding output state values, and to delay a preset time, so that the PCI devices connected to the PCI slots of each bandwidth are hot restarted.

In order to solve the above technical problems, the present application also provides a device for hot restarting a PCI device, including:

memory for storing computer programs;

The processor is configured to implement the steps of the method for hot restarting a PCI device according to any one of the above when executing the computer program.

In order to solve the above technical problems, the present application also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, any one of the above-mentioned methods is implemented. The steps of the PCI device hot restart method.

The present application provides a method for hot restarting a PCI device, which physically connects a GPIO signal interface of an ARM processor with a Reset signal interface of a PCI slot with x16 bandwidth, and the PCI slot with x16 bandwidth can be split into PCI slots with other bandwidths Set the output state value of each GPIO signal interface, and control each GPIO signal interface to output the GPIO signal corresponding to the output state value, and delay With a preset time, the hot restart of PCI devices with different bandwidths can be realized. The present application also provides a system, device, and computer-readable storage medium for hot restarting a PCI device, which have the same beneficial effects as the above-mentioned method for hot restarting a PCI device.

Description of drawings

In order to describe the embodiments of the present application more clearly, the following will briefly introduce the drawings that are used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

Fig. 1 is the structural representation of a kind of ARM motherboard provided by this application;

2 is a flowchart of steps of a method for hot restarting a PCI device provided by the application;

FIG. 3 is a schematic structural diagram of a system for hot restarting a PCI device provided by the present application.

Detailed ways

The core of the present application is to provide a method, system, device and computer-readable storage medium for hot restarting of PCI devices, which physically connect the GPIO signal interface of the ARM processor with the Reset signal interface of the PCI slot of x16 bandwidth, and use each GPIO The GPIO signal output by the signal interface can realize the hot restart of PCI devices with different bandwidths.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In order to facilitate the understanding of the solution of the present application, an ARM server to which this PCI device hot restart method is applicable will be described. The ARM server includes an ARM motherboard, and the structure of the ARM motherboard is shown in FIG. 1. The ARM motherboard includes an ARM processor and a PCI with various bandwidths. Slots include PCI slots with x16 bandwidth, PCI slots with x8 bandwidth, and PCI slots with x4 bandwidth. The ARM processor includes multiple GPIO signal interfaces. Only 4 GPIO signal interfaces are shown in Figure 1. The x16 bandwidth The PCI slot includes 16 reset signal interfaces, and the 16 reset signal interfaces are divided into 4 groups, each group includes 4 reset signal interfaces, and the 4 GPIO signal interfaces are respectively connected with 4 groups of reset signal interfaces, as shown in Figure 1 , PCI slots with x16 bandwidth can be split into two groups of PCI slots with x8 bandwidth, can also be split into four groups of PCI slots with x4 bandwidth, and can also be split into one group of PCI slots with x8 bandwidth and two groups PCI slot with x4 bandwidth.

Please refer to FIG. 2. FIG. 2 is a flowchart of steps of a method for hot restarting a PCI device provided by the application. The method for hot restarting a PCI device includes:

S101: Obtain a GPIO state value of a PCI slot of each bandwidth for performing a hot restart operation;

Specifically, when PCI slots of different bandwidths perform a hot restart operation, the required GPIO state values are different. In order to implement subsequent hot restart of PCI devices on each PCI slot, first obtain the PCI slot of each bandwidth. Bit GPIO state value required to perform a warm restart operation.

It can be understood that the GPIO state value corresponding to the PCI slot of each bandwidth will be adaptively adjusted according to the ARM server to which the PCI slot of the x16 bandwidth belongs and its split state. Therefore, before performing this step, it is also necessary to obtain the PCI of the x16 bandwidth. The operation of the ARM server to which the slot belongs and the split state, and then according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, it is determined that in the current split state, the PCI slot of each bandwidth is used to perform a hot restart The GPIO state value of the operation.

Specifically, the GPIO state value of the PCI slot of each bandwidth used for the hot restart operation can be set in advance according to the actual project needs. As an optional embodiment, the PCI slot of the x16 bandwidth can be pre-created in different split states. And the GPIO state value table required by the PCI slot of each bandwidth corresponding to different ARM servers, so that in subsequent practical applications, the target GPIO state value table can be determined according to the current ARM server and split state of the x16 bandwidth. Determine the GPIO state value corresponding to the PCI slot of each bandwidth in the current split state according to the target GPIO state value table.

S102: Determine the output state value of each GPIO signal interface according to the GPIO state value;

S103: Control each GPIO signal interface to output the GPIO signal according to the corresponding output state value, and delay the preset time, so as to make the PCI device connected to the PCI slot of each bandwidth hot restart.

Specifically, the output state value of each GPIO signal interface can be determined according to the GPIO state value, and the corresponding output state value of each GPIO signal interface can be controlled to output the GPIO signal to the Reset signal interface of the PCI slot of the corresponding bandwidth, so as to trigger the trigger The PCI device on the PCI slot of the bandwidth performs a warm restart operation. It can be understood that in this embodiment, each GPIO signal interface is controlled to output the GPIO signal according to the corresponding output state value and delay the preset time to ensure that the PCI device can normally complete the hot restart operation. The time required for hot restart is determined, for example, it can be set to 100ms.

For example, assuming that the GPIO state value required by the PCI slot of x16 bandwidth to perform a hot restart operation is 0111, then set the output state values of GPIO1, GPIO2, GPIO3, and GPIO4 in Figure 1 to 0, 1, 1, 1.

Specifically, before this step is performed, it also includes an operation of judging whether there is a PCI device in the PCI slot of each bandwidth in the current split state. If there is no PCI device in the PCI slot of a certain bandwidth, the bandwidth of The output state value of each GPIO signal interface corresponding to the PCI slot keeps the default state. It can be understood that when the ARM motherboard is powered on, the BIOS defaults to set the output state value of the four GPIOs to the high state value. Therefore, , keep the default state, that is, keep the high state value state.

As an optional embodiment, the process of controlling each GPIO signal interface to output the GPIO signal according to the corresponding output state value includes:

Simultaneously or sequentially, each GPIO signal interface is controlled to output the GPIO signal according to the corresponding output state value.

Specifically, in this embodiment, the output state values of each GPIO signal interface can be set simultaneously or sequentially, and simultaneously pulling down the setting can ensure signal synchronization and avoid loss of PCI device hot restart.

It can be seen that in this embodiment, the GPIO signal interface of the ARM processor is physically connected to the Reset signal interface of the PCI slot with x16 bandwidth, and the PCI slot with x16 bandwidth can be split into PCI slots with other bandwidths. Set the output state value of each GPIO signal interface, and control each GPIO signal interface to output the GPIO signal corresponding to the output state value, and delay the preset time, namely Enables hot restart of PCI devices of different bandwidths.

On the basis of the above-mentioned embodiment:

As an optional embodiment, after delaying a preset time, the method for hot restarting a PCI device further includes:

Control each GPIO signal interface to output the GPIO signal according to the high state value.

Specifically, considering that a PCI slot with x16 bandwidth can be divided into PCI slots with multiple bandwidths, and the GPIO state values required for performing a hot restart operation are different for PCI slots with different bandwidths, therefore, when the x16 bandwidth is When the PCI slot is divided into multiple PCI slots with different bandwidths, such as when it is divided into x8x4x4, the above steps S102 to S103 need to be performed multiple times to control the PCI slots on the PCI slot with the x8 bandwidth. Device hot restart and PCI device hot restart on PCI slots with x4 bandwidth.

For example, you can first set the output state value of the four GPIO signal interfaces according to the GPIO state value required by the hot restart of the PCI slot of the x8 bandwidth, so that the four GPIO interfaces output the corresponding GPIO signal and delay the preset time to complete the x8 bandwidth. A warm restart of the PCI device. In order to satisfy the hot restart function of the PCI slot of the subsequent x4 bandwidth, after a preset time delay, control each GPIO signal interface to output the GPIO signal according to the high state value, and then execute the GPIO required for the hot restart of the PCI slot according to the x4 bandwidth. The state value sets the output state value of the four GPIO signal interfaces, so that the four GPIO interfaces output the corresponding GPIO signals and delay the preset time to complete the hot restart of the x4 bandwidth PCI device.

It is understandable that since the GPIO state values required for hot restart of PCI slots with different bandwidths are not the same, when a PCI device on a PCI slot with x4 bandwidth is hot restarted, it will not affect the x8 bandwidth. The PCI device works normally. Similarly, when a PCI device with an x8 bandwidth is hot restarted, the PCI device with an x4 bandwidth will not be affected.

To sum up, in this application, the BIOS confirms the GPIO state value table used by the PCI slot by confirming which processor the PCI slots of different bandwidths come from and whether there is a split before the PCI enumeration. At the same time, the 4 GPIO signals are pulled down according to the state value table and delayed by 100ms to realize the hot restart function of PCI slot devices with different bandwidths, which ensures that the PCI devices can still be used normally after the ARM server is restarted. Batch deployment and application start-up are effective guarantees, which are in line with the future development trend of ARM server technology.

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of a PCI device hot restart system provided by the application, applied to an ARM motherboard. The ARM motherboard is provided with an ARM processor and PCI slots of various bandwidths. A plurality of GPIO signal interfaces are connected to the Reset signal interface of the PCI slot with x16 bandwidth. The PCI device hot restart system includes:

Obtaining module 1, used to obtain the GPIO state value of the PCI slot of each bandwidth for performing the hot restart operation;

Determining module 2, for determining the output state value of each GPIO signal interface according to the GPIO state value;

The control module 3 is used to control each GPIO signal interface to output the GPIO signal according to the corresponding output state value, and delay the preset time, so that the PCI device connected to the PCI slot of each bandwidth is hot restarted.

It can be seen that in this embodiment, the GPIO signal interface of the ARM processor is physically connected to the Reset signal interface of the PCI slot with x16 bandwidth, and the PCI slot with x16 bandwidth can be split into PCI slots with other bandwidths. Set the output state value of each GPIO signal interface, and control each GPIO signal interface to output the GPIO signal corresponding to the output state value, and delay the preset time, namely Enables hot restart of PCI devices of different bandwidths.

As an optional embodiment, the acquisition module 1 is specifically used for:

According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, determine the GPIO state value of the PCI slot of each bandwidth for performing the hot restart operation.

As an optional embodiment, the process of determining the GPIO state value of the PCI slot of each bandwidth for performing the hot restart operation according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs includes:

According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, select the preset state value table;

Obtain the GPIO state value of the PCI slot of each bandwidth for performing the warm restart operation in the preset state value table.

As an optional embodiment, the number of GPIO signal interfaces is four.

As an optional embodiment, the control module 3 is further configured to control each GPIO signal interface to output a GPIO signal according to a high state value after a preset time delay.

As an optional embodiment, the control module 3 is further configured to control each GPIO signal interface to output a GPIO signal according to a high state value when the ARM motherboard is powered on.

As an optional embodiment, the process of controlling each GPIO signal interface to output the GPIO signal according to the corresponding output state value includes:

Simultaneously or sequentially, each GPIO signal interface is controlled to output the GPIO signal according to the corresponding output state value.

On the other hand, the present application also provides a device for hot restarting a PCI device, including:

memory for storing computer programs;

The processor is configured to implement the steps of the method for hot restarting a PCI device as described in any one of the above embodiments when executing the computer program.

Specifically, the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer-readable instructions, and the internal memory provides an environment for the operation of the operating system and the computer-readable instructions in the non-volatile storage medium. When the processor executes the computer program stored in the memory, the following steps can be implemented: obtaining the GPIO state value of the PCI slot of each bandwidth for performing the hot restart operation; determining the output state value of each GPIO signal interface according to the GPIO state value; controlling the Each GPIO signal interface outputs a GPIO signal according to its corresponding output state value, and delays it for a preset time, so that the PCI device connected to the PCI slot of each bandwidth is warmly restarted.

It can be seen that in this embodiment, the GPIO signal interface of the ARM processor is physically connected to the Reset signal interface of the PCI slot with x16 bandwidth, and the PCI slot with x16 bandwidth can be split into PCI slots with other bandwidths. Set the output state value of each GPIO signal interface, and control each GPIO signal interface to output the GPIO signal corresponding to the output state value, and delay the preset time, namely Enables hot restart of PCI devices of different bandwidths.

As an optional embodiment, when the processor executes the computer subprogram stored in the memory, the following steps may be implemented: determining the PCI slot of each bandwidth according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs. GPIO state value for performing a warm restart operation.

As an optional embodiment, when the processor executes the computer subprogram saved in the memory, the following steps can be implemented: according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, select a preset state value table; Obtain the GPIO state value of the PCI slot of each bandwidth for performing the warm restart operation in the preset state value table.

As an optional embodiment, when the processor executes the computer subprogram stored in the memory, the following steps may be implemented: after a preset time delay, control each GPIO signal interface to output a GPIO signal according to a high state value.

As an optional embodiment, when the processor executes the computer subprogram stored in the memory, the following steps may be implemented: when the ARM motherboard is powered on, it controls each GPIO signal interface to output a GPIO signal according to a high state value.

As an optional embodiment, when the processor executes the computer subprogram stored in the memory, the following steps may be implemented: simultaneously or sequentially controlling each GPIO signal interface to output the GPIO signal according to the corresponding output state value.

On the other hand, the present application also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method for hot restarting a PCI device as described in any one of the above embodiments is implemented A step of.

The present application also provides a computer-readable storage medium, the storage medium may include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic Various media that can store program codes, such as discs or optical discs. A computer program is stored on the storage medium, and when the computer program is executed by the processor, the following steps are implemented: obtaining the GPIO state value of the PCI slot of each bandwidth for performing the hot restart operation; determining the output of each GPIO signal interface according to the GPIO state value State value; control each GPIO signal interface to output the GPIO signal according to the corresponding output state value, and delay the preset time, so that the PCI device connected to the PCI slot of each bandwidth is hot restarted.

It can be seen that in this embodiment, the GPIO signal interface of the ARM processor is physically connected to the Reset signal interface of the PCI slot with x16 bandwidth, and the PCI slot with x16 bandwidth can be split into PCI slots with other bandwidths. Set the output state value of each GPIO signal interface, and control each GPIO signal interface to output the GPIO signal corresponding to the output state value, and delay the preset time, namely Enables hot restart of PCI devices of different bandwidths.

As an optional embodiment, when the computer subprogram stored in the computer-readable storage medium is executed by the processor, the following steps may be specifically implemented: determining each PCI slot according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs. A bandwidth PCI slot is used to perform the GPIO state value of the warm restart operation.

As an optional embodiment, when the computer subprogram stored in the computer-readable storage medium is executed by the processor, the following steps may be specifically implemented: according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, select The preset state value table; the GPIO state value used for performing the warm restart operation in the PCI slot of each bandwidth is obtained from the preset state value table.

As an optional embodiment, when the computer subprogram stored in the computer-readable storage medium is executed by the processor, the following steps may be specifically implemented: after a preset time delay, control each GPIO signal interface to output a GPIO signal according to a high state value .

As an optional embodiment, when the computer subprogram stored in the computer-readable storage medium is executed by the processor, the following steps may be specifically implemented: when the ARM motherboard is powered on, control each GPIO signal interface to output the GPIO according to the high state value Signal.

As an optional embodiment, when the computer subprogram stored in the computer-readable storage medium is executed by the processor, the following steps may be specifically implemented: simultaneously or sequentially controlling each GPIO signal interface to output the GPIO signal according to the corresponding output state value. .

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a PCI device hot restart method, it is characterized in that, be applied to ARM mainboard, be provided with the PCI slot position of ARM processor and multiple bandwidths on ARM mainboard, the multiple GPIO signal interface of described AMR processor and x16 bandwidth The Reset signal interface of the described PCI slot is connected, and this PCI device hot restart method includes: Obtain the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation; Determine an output state value of each of the GPIO signal interfaces according to the GPIO state value; Each of the GPIO signal interfaces is controlled to output GPIO signals according to their corresponding output state values, and is delayed for a preset time, so that the PCI devices connected to the PCI slots of each bandwidth are restarted warmly. 2. The method for hot restarting a PCI device according to claim 1, wherein the process for obtaining the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation comprises: According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, a GPIO state value of the PCI slot of each bandwidth used for performing a warm restart operation is determined. 3. The method for hot restarting a PCI device according to claim 2, wherein the PCI slot of each bandwidth is determined according to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs. The process of biting a GPIO state value for performing a warm restart operation includes: According to the split state of the PCI slot of the x16 bandwidth and the ARM processor to which it belongs, select a preset state value table; The GPIO state value of the PCI slot of each bandwidth for performing a warm restart operation is obtained from the preset state value table. 4 . The method for hot restarting a PCI device according to claim 1 , wherein the number of the GPIO signal interfaces is 4. 5 . 5. The method for hot restarting a PCI device according to claim 1, wherein after the delay preset time, the method for hot restarting a PCI device further comprises: Control each of the GPIO signal interfaces to output a GPIO signal according to a high state value. 6. The method for hot restarting a PCI device according to claim 1 , wherein before the GPIO state value of the PCI slot of each bandwidth obtained for performing a hot restart operation, the method for hot restarting the PCI device further comprises: : When the ARM main board is powered on, each of the GPIO signal interfaces is controlled to output a GPIO signal according to a high state value. 7. The method for hot restarting a PCI device according to any one of claims 1-6, wherein the process of controlling each of the GPIO signal interfaces to output GPIO signals by respective corresponding output state values comprises: Control each of the GPIO signal interfaces simultaneously or sequentially to output GPIO signals according to their corresponding output state values. 8. a PCI device hot restart system, it is characterized in that, be applied to ARM mainboard, be provided with the PCI slot position of ARM processor and multiple bandwidths on ARM mainboard, the multiple GPIO signal interface of described AMR processor and x16 bandwidth The Reset signal interface of the described PCI slot is connected, and the PCI device hot restart system includes: an acquisition module for acquiring the GPIO state value of the PCI slot of each bandwidth for performing a hot restart operation; a determining module, configured to determine the output state value of each of the GPIO signal interfaces according to the GPIO state value; The control module is configured to control each of the GPIO signal interfaces to output GPIO signals according to their corresponding output state values, and to delay a preset time, so that the PCI devices connected to the PCI slots of each bandwidth are hot restarted. 9. A PCI device hot restart device, characterized in that, comprising: memory for storing computer programs; The processor is configured to implement the steps of the method for hot restarting a PCI device according to any one of claims 1-7 when executing the computer program. 10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the PCI according to any one of claims 1-7 is implemented Steps of the device warm restart method.

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