International Business Machines Corporation

Michael W Clark

Steven T Pancoast

Dwayne T Crump

Patrick Joseph Callaghan

James Lee Combs

Jerry T Kozel

Chris A Nevitt

A system includes at least a secure-boot file, a hypervisor, and a host. The secure-boot file is configured to securely boot a VM, where the secure-boot file is signed with a boot private key. The hypervisor is configured to run the VM. The hypervisor includes a boot public key corresponding to the boot private key, such that the hypervisor is configured to validate the secure-boot file, and the hypervisor is signed with a hypervisor private key. A kernel of the host is configured to run the VM, where the kernel includes a hypervisor public key corresponding to the hypervisor private key, such that the host is configured to validate the hypervisor.

Secure boot of a virtual machine

A computer system having a CPU, a switch, a power supply, and power supply control logic for controlling the state of the power supply via a control signal. The power supply control logic comprises circuitry to interface control of the power supply between the CPU and the user via the switch. The power supply control logic further comprises a fault circuit that detects a fault condition in the power supply and negates the control signal, thereby clearing the fault condition in the power supply.

Automatic clearing of power supply fault condition in suspend system

A computer system having a suspend/resume capability in addition to the normal operating state and the off state. Closure events of single momentary pushbutton switch control changes between the normal operating state, the suspend state, and the off state, depending on the value of a flag. If the flag is set in a certain state, closure events of the switch cause the computer system to change back and forth between the normal operating state and the off state. If the flag is set in a different state, closure events of the switch cause the computer system to change back and forth between the normal operating state and the suspend state. The switch also controls the video subsystem of the computer system such that pressing the switch blanks the video display terminal giving the user instantaneous feedback of the switch press.

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Lexington, KY, United States of America

Michael W Clark