84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
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/*
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* \brief Utilities for implementing VMMs on Genode/NOVA
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* \author Norman Feske
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* \date 2013-08-20
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*/
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/*
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* Copyright (C) 2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__VMM__VCPU_THREAD_H_
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#define _INCLUDE__VMM__VCPU_THREAD_H_
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/* Genode includes */
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#include <base/cap_map.h>
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#include <base/thread.h>
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#include <cap_session/connection.h>
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#include <nova_cpu_session/connection.h>
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namespace Vmm {
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using namespace Genode;
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class Vcpu_thread;
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}
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class Vmm::Vcpu_thread : Genode::Thread_base
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{
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private:
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/**
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* Log2 size of portal window used for virtualization events
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*/
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enum { VCPU_EXC_BASE_LOG2 = 8 };
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public:
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Vcpu_thread(size_t stack_size)
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:
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Thread_base("vCPU", stack_size)
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{
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/* release pre-allocated selectors of Thread */
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Genode::cap_map()->remove(tid().exc_pt_sel, Nova::NUM_INITIAL_PT_LOG2);
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/* allocate correct number of selectors */
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this->tid().exc_pt_sel = cap_map()->insert(VCPU_EXC_BASE_LOG2);
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/* tell generic thread code that this becomes a vCPU */
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this->tid().is_vcpu = true;
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}
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~Vcpu_thread()
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{
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using namespace Nova;
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revoke(Nova::Obj_crd(this->tid().exc_pt_sel, VCPU_EXC_BASE_LOG2));
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cap_map()->remove(this->tid().exc_pt_sel, VCPU_EXC_BASE_LOG2, false);
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/* allocate selectors for ~Thread */
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this->tid().exc_pt_sel = cap_map()->insert(Nova::NUM_INITIAL_PT_LOG2);
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}
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addr_t exc_base() { return this->tid().exc_pt_sel; }
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void start(Genode::addr_t sel_ec)
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{
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this->Thread_base::start();
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/*
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* Request native EC thread cap and put it next to the
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* SM cap - see Vcpu_dispatcher->sel_sm_ec description
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*/
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request_native_ec_cap(_pager_cap, sel_ec);
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}
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void entry() { }
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};
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#endif /* _INCLUDE__VMM__VCPU_THREAD_H_ */
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