Interface boot.h

The libsel4vm boot interface provides us with base abstractions to create, initialise and configure VM and VCPU instances.

Brief content:

Functions:

vm_init(vm, vka, host_simple, host_vspace, io_ops, host_endpoint, name)

vm_create_vcpu(vm, priority)

vm_assign_vcpu_target(vcpu, target_cpu)

Functions

The interface boot.h defines the following functions.

Function vm_init(vm, vka, host_simple, host_vspace, io_ops, host_endpoint, name)

Initialise/Create VM

Parameters:

• vm {vm_t *}: Handle to the VM being initialised
• vka {vka_t *}: Initialised handle to virtual kernel allocator for seL4 kernel object allocation
• host_simple {simple_t *}: Initialised handle to hosts simple environment
• host_vspace {vspace_t}: Initialised handle to hosts vspace
• ps_io_ops {ps_io_ops_t *}: Initialised handle to platforms io ops
• host_enpoint {seL4_CPtr}: Host’s endpoint. The library will wait and manage the endpoint when running a VM instance
• name {const char *}: String used to describe VM. Useful for debugging

Returns:

• 0 on success, otherwise -1 for error

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Function vm_create_vcpu(vm, priority)

Create a VCPU for a given VM

Parameters:

• vm {vm_t *}: A handle to VM being configured with a new vcpu
• priority {int}: The scheduling priority assigned to the VCPU thread

Returns:

• NULL for error, otherwise pointer to created vm_vcpu_t object

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Function vm_assign_vcpu_target(vcpu, target_cpu)

Assign a vcpu with logical target cpu to run on

Parameters:

• vcpu {vm_vcpu_t *}: A handle to the VCPU
• target {int}: Logical target CPU ID

Returns:

• -1 for error, otherwise 0 for success

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