133 lines
2.9 KiB
C++
133 lines
2.9 KiB
C++
/*
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* \brief Kernel backend for virtual machines
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* \author Martin Stein
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* \date 2013-10-30
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*/
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/*
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* Copyright (C) 2013-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _CORE__KERNEL__VM_H_
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#define _CORE__KERNEL__VM_H_
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#include <cpu/vm_state.h>
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/* core includes */
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#include <kernel/cpu_context.h>
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#include <kernel/kernel.h>
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#include <kernel/pd.h>
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#include <kernel/signal_receiver.h>
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namespace Kernel
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{
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/**
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* Kernel backend for a virtual machine
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*/
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class Vm;
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}
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class Kernel::Vm : public Cpu_job,
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public Kernel::Object
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{
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private:
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/*
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* Noncopyable
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*/
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Vm(Vm const &);
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Vm &operator = (Vm const &);
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enum State { ACTIVE, INACTIVE };
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unsigned _id = 0;
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Genode::Vm_state * const _state;
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Signal_context * const _context;
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void * const _table;
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State _scheduled = INACTIVE;
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public:
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/**
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* Constructor
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*
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* \param state initial CPU state
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* \param context signal for VM exceptions other than interrupts
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* \param table translation table for guest to host physical memory
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*/
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Vm(void * const state,
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Signal_context * const context,
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void * const table);
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~Vm();
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/**
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* Inject an interrupt to this VM
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*
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* \param irq interrupt number to inject
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*/
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void inject_irq(unsigned irq);
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/**
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* Create a virtual machine that is stopped initially
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*
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* \param dst memory donation for the VM object
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* \param state location of the CPU state of the VM
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* \param signal_context_id kernel name of the signal context for VM events
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* \param table guest-physical to host-physical translation
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* table pointer
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*
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* \retval cap id when successful, otherwise invalid cap id
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*/
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static capid_t syscall_create(void * const dst, void * const state,
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capid_t const signal_context_id,
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void * const table)
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{
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return call(call_id_new_vm(), (Call_arg)dst, (Call_arg)state,
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(Call_arg)table, signal_context_id);
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}
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/**
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* Destruct a virtual-machine
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*
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* \param vm pointer to vm kernel object
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*
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* \retval 0 when successful, otherwise !=0
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*/
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static void syscall_destroy(Vm * const vm) {
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call(call_id_delete_vm(), (Call_arg) vm); }
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/****************
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** Vm_session **
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****************/
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void run()
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{
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if (_scheduled != ACTIVE) Cpu_job::_activate_own_share();
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_scheduled = ACTIVE;
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}
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void pause()
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{
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if (_scheduled != INACTIVE) Cpu_job::_deactivate_own_share();
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_scheduled = INACTIVE;
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}
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/*************
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** Cpu_job **
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*************/
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void exception(Cpu & cpu) override;
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void proceed(Cpu & cpu) override;
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Cpu_job * helping_sink() override { return this; }
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};
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#endif /* _CORE__KERNEL__VM_H_ */
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