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128 lines
3.1 KiB
C++
128 lines
3.1 KiB
C++
/*
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* \brief Connection to a VM service
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* \author Stefan Kalkowski
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* \author Christian Helmuth
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* \date 2012-10-02
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*
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* The VM connection is the API for VM and vCPU handling and implemented
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* for each platform specifically.
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*/
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/*
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* Copyright (C) 2012-2021 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 _INCLUDE__VM_SESSION__CONNECTION_H_
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#define _INCLUDE__VM_SESSION__CONNECTION_H_
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#include <base/connection.h>
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#include <base/rpc_client.h>
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#include <vm_session/vm_session.h>
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#include <cpu_session/cpu_session.h>
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#include <util/retry.h>
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#include <util/noncopyable.h>
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namespace Genode {
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struct Vm_connection;
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struct Vcpu_handler_base;
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struct Vcpu_state;
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struct Allocator;
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}
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struct Genode::Vm_connection : Connection<Vm_session>, Rpc_client<Vm_session>
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{
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/**
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* Issue session request
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*
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* \noapi
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*/
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Capability<Vm_session> _session(Parent &parent, char const *label, long priority,
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unsigned long affinity)
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{
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return session(parent,
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"priority=0x%lx, affinity=0x%lx, ram_quota=16K, cap_quota=10, label=\"%s\"",
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priority, affinity, label);
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}
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/*
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* VM-Exit state-transfer configuration
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*
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* Per default all Vcpu_state is transfered on each exit reason. The exit
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* config enables omission of some state transfers on specific exit
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* reasons.
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*/
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struct Exit_config
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{
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/* for example OMIT_FPU_ON_IRQ */
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};
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/**
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* Virtual CPU
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*
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* A vCPU can be created only from a Vm_connection and is, thus, bounded to
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* a VM until destroyed.
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*/
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struct Vcpu : Genode::Noncopyable
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{
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Native_vcpu &_native_vcpu;
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Vcpu(Vm_connection &, Allocator &, Vcpu_handler_base &, Exit_config const &);
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void run();
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void pause();
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Vcpu_state & state();
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};
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friend class Vcpu;
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/**
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* Constructor
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*
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* \param label initial session label
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* \param priority designated priority of the VM
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* \param affinity which physical CPU the VM should run on top of
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*/
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Vm_connection(Env &env, const char *label = "",
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long priority = Cpu_session::DEFAULT_PRIORITY,
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unsigned long affinity = 0)
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:
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Connection<Vm_session>(env, _session(env.parent(), label, priority, affinity)),
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Rpc_client<Vm_session>(cap())
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{ }
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template <typename FUNC>
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auto with_upgrade(FUNC func) -> decltype(func())
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{
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return Genode::retry<Genode::Out_of_ram>(
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[&] () {
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return Genode::retry<Genode::Out_of_caps>(
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[&] () { return func(); },
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[&] () { this->upgrade_caps(2); });
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},
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[&] () { this->upgrade_ram(4096); }
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);
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}
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/**************************
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** Vm_session interface **
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**************************/
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void attach(Dataspace_capability ds, addr_t vm_addr, Attach_attr attr) override
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{
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with_upgrade([&] () {
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call<Rpc_attach>(ds, vm_addr, attr); });
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}
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void detach(addr_t vm_addr, size_t size) override {
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call<Rpc_detach>(vm_addr, size); }
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void attach_pic(addr_t vm_addr) override {
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call<Rpc_attach_pic>(vm_addr); }
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};
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#endif /* _INCLUDE__VM_SESSION__CONNECTION_H_ */
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