System-on-chip for sharing graphics processing unit that supports multimaster, and method for operating graphics processing unit

A method of operating a GPU mounted on an SoC, the method comprising:

• collecting execution state information of operating systems respectively executed by at least two CPUs;
• determining whether there is an operating system operating in an abnormal state based on the execution state information;
• and
• terminating an existing job of the operating system determined to be operating in the abnormal state and waiting until a reboot of the operating system determined to be operating in the abnormal state is completed,
• wherein the GPU performs a sharing operation that processes jobs requested by the operating systems, and the execution state information is collected via a bus interface that is connected to a state monitoring device connected to at least one of the at least two CPUs, and
• wherein one of the operating systems operates as a host operating system, and, when the operating system operating in the abnormal state is the host operating system, configuration of the GPU is suspended until a reboot of the host operating system is completed.