zx_guest_create

Summary

Create a guest.

Declaration

#include <zircon/syscalls.h>

zx_status_t zx_guest_create(zx_handle_t resource,
                            uint32_t options,
                            zx_handle_t* guest_handle,
                            zx_handle_t* vmar_handle);

Description

zx_guest_create() creates a guest, which is a virtual machine that can be run within the hypervisor, with vmar_handle used to represent the physical address space of the guest.

To create a guest, a resource of ZX_RSRC_KIND_SYSTEM with ZX_RSRC_SYSTEM_HYPERVISOR_BASE must be supplied.

In order to begin execution within the guest, a VMO should be mapped into vmar_handle using zx_vmar_map(), and a VCPU must be created using zx_vcpu_create(), and then run using zx_vcpu_enter().

Additionally, a VMO should be mapped into vmar_handle to provide a guest with physical memory.

The following rights will be set on the handle guest_handle by default:

ZX_RIGHT_TRANSFER — guest_handle may be transferred over a channel.

ZX_RIGHT_DUPLICATE — guest_handle may be duplicated.

ZX_RIGHT_WRITE — A trap to be may be set using zx_guest_set_trap().

ZX_RIGHT_MANAGE_THREAD — A VCPU may be created using zx_vcpu_create().

See zx_vmo_create() for the set of rights applied to vmar_handle.

Rights

resource must have resource kind ZX_RSRC_KIND_SYSTEM with base ZX_RSRC_SYSTEM_HYPERVISOR_BASE.

Return value

zx_guest_create() returns ZX_OK on success. On failure, an error value is returned.

Errors

ZX_ERR_NOT_SUPPORTED The hypervisor is not supported by the device.

ZX_ERR_ACCESS_DENIED resource is not of kind ZX_RSRC_KIND_SYSTEM with base ZX_RSRC_SYSTEM_HYPERVISOR_BASE.

ZX_ERR_INVALID_ARGS guest_handle or vmar_handle is an invalid pointer, or options is nonzero.

ZX_ERR_NO_MEMORY Failure due to lack of memory. There is no good way for userspace to handle this (unlikely) error. In a future build this error will no longer occur.

ZX_ERR_WRONG_TYPE resource is not a handle to a resource.

See also