mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-20 22:23:16 +00:00
d866b6b053
The 'Thread_creation_failed' error is now reflected as 'Thread::Start_result' return value. This change also removes the use of 'Invalid_thread' within core as this exception is an alias of Cpu_session::Thread_creation_failed. Issue #5245
139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
/*
|
|
* \brief Utilities for implementing VMMs on Genode/NOVA
|
|
* \author Norman Feske
|
|
* \date 2013-08-20
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2013-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__VMM__VCPU_THREAD_H_
|
|
#define _INCLUDE__VMM__VCPU_THREAD_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/thread.h>
|
|
#include <cpu_session/connection.h>
|
|
#include <pd_session/connection.h>
|
|
#include <region_map/client.h>
|
|
#include <cpu_thread/client.h>
|
|
#include <nova_native_cpu/client.h>
|
|
|
|
/* NOVA includes */
|
|
#include <nova/native_thread.h>
|
|
#include <nova/cap_map.h>
|
|
|
|
namespace Vmm {
|
|
|
|
using namespace Genode;
|
|
|
|
class Vcpu_thread;
|
|
class Vcpu_other_pd;
|
|
class Vcpu_same_pd;
|
|
}
|
|
|
|
class Vmm::Vcpu_thread
|
|
{
|
|
public:
|
|
|
|
virtual Genode::addr_t exc_base() = 0;
|
|
virtual void start(Genode::addr_t) = 0;
|
|
|
|
virtual ~Vcpu_thread() { };
|
|
};
|
|
|
|
class Vmm::Vcpu_other_pd : public Vmm::Vcpu_thread
|
|
{
|
|
private:
|
|
|
|
Genode::Capability<Genode::Pd_session> _pd_cap;
|
|
Genode::Affinity::Location _location;
|
|
Genode::Cpu_connection *_cpu_connection;
|
|
|
|
Genode::addr_t _exc_pt_sel;
|
|
|
|
/*
|
|
* Noncopyable
|
|
*/
|
|
Vcpu_other_pd(Vcpu_other_pd const &);
|
|
Vcpu_other_pd &operator = (Vcpu_other_pd const &);
|
|
|
|
public:
|
|
|
|
Vcpu_other_pd(Cpu_connection * cpu_connection,
|
|
Genode::Affinity::Location location,
|
|
Genode::Capability<Genode::Pd_session> pd_cap,
|
|
Genode::size_t = 0 /* stack_size */)
|
|
:
|
|
_pd_cap(pd_cap), _location(location), _cpu_connection(cpu_connection),
|
|
_exc_pt_sel(Genode::cap_map().insert(Nova::NUM_INITIAL_VCPU_PT_LOG2))
|
|
{ }
|
|
|
|
void start(Genode::addr_t sel_ec) override
|
|
{
|
|
using namespace Genode;
|
|
|
|
Thread_capability vcpu_vm { };
|
|
|
|
while (!vcpu_vm.valid()) {
|
|
|
|
bool denied = false;
|
|
|
|
using Error = Cpu_session::Create_thread_error;
|
|
_cpu_connection->create_thread(_pd_cap, "vCPU", _location,
|
|
Cpu_session::Weight()).with_result(
|
|
[&] (Thread_capability cap) { vcpu_vm = cap; },
|
|
[&] (Error e) {
|
|
if (e == Error::OUT_OF_RAM) _cpu_connection->upgrade_ram(8*1024);
|
|
else if (e == Error::OUT_OF_CAPS) _cpu_connection->upgrade_caps(2);
|
|
else
|
|
denied = true;
|
|
}
|
|
);
|
|
|
|
if (denied) {
|
|
error("Vcpu_other_pd: failed to create vCPU");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* tell parent that this will be a vCPU */
|
|
Cpu_session::Native_cpu::Thread_type thread_type { Cpu_session::Native_cpu::Thread_type::VCPU };
|
|
Cpu_session::Native_cpu::Exception_base exception_base { _exc_pt_sel };
|
|
Nova_native_cpu_client native_cpu(_cpu_connection->native_cpu());
|
|
native_cpu.thread_type(vcpu_vm, thread_type, exception_base);
|
|
|
|
Cpu_thread_client cpu_thread(vcpu_vm);
|
|
|
|
/*
|
|
* Translate vcpu_vm thread cap via current executing thread,
|
|
* which is used to lookup current PD to delegate VM-exit portals.
|
|
*/
|
|
addr_t const current = Thread::myself()->native_thread().exc_pt_sel
|
|
+ Nova::PT_SEL_PAGE_FAULT;
|
|
translate_remote_pager(current, vcpu_vm.local_name());
|
|
|
|
/* start vCPU in separate PD */
|
|
cpu_thread.start(0, 0);
|
|
|
|
/*
|
|
* Request native EC thread cap used for recalling vCPU
|
|
*/
|
|
addr_t const pager_pt = _exc_pt_sel + Nova::PT_SEL_PAGE_FAULT;
|
|
request_native_ec_cap(pager_pt, sel_ec);
|
|
|
|
/* solely needed for vcpu to request native ec cap - drop it */
|
|
Nova::revoke(Nova::Obj_crd(pager_pt, 0));
|
|
|
|
/* request creation of SC to let vCPU run */
|
|
cpu_thread.resume();
|
|
}
|
|
|
|
Genode::addr_t exc_base() override { return _exc_pt_sel; }
|
|
};
|
|
|
|
#endif /* _INCLUDE__VMM__VCPU_THREAD_H_ */
|