mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-22 23:12:24 +00:00
1df48b8331
To ease the creation of custom virtual machine monitors on top of NOVA, this patch moves generic utilities from vancouver resp. seoul to the public include location 'ports/include/vmm'. As a nice side effect, this change simplifies 'vancouver/main.cc'. Issue #949
119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
|
|
* \brief Utilities for implementing VMMs on Genode/NOVA
|
|
* \author Norman Feske
|
|
* \date 2013-08-20
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__VMM__VCPU_DISPATCHER_H_
|
|
#define _INCLUDE__VMM__VCPU_DISPATCHER_H_
|
|
|
|
namespace Vmm {
|
|
|
|
using namespace Genode;
|
|
|
|
class Vcpu_dispatcher;
|
|
}
|
|
|
|
|
|
/**
|
|
* Thread that handles virtualization events of a 'Vmm::Vcpu_thread'
|
|
*/
|
|
class Vmm::Vcpu_dispatcher : public Genode::Thread_base
|
|
{
|
|
private:
|
|
|
|
Cap_connection &_cap;
|
|
|
|
/**
|
|
* Portal entry point entered on virtualization events
|
|
*
|
|
* For each event type used as argument of the 'register_handler'
|
|
* function template, the compiler automatically generates a separate
|
|
* instance of this function. The sole purpose of this function is to
|
|
* call the 'Vcpu' member function corresponding to the event type.
|
|
*/
|
|
template <unsigned EV, typename DISPATCHER, void (DISPATCHER::*FUNC)()>
|
|
static void _portal_entry()
|
|
{
|
|
/* obtain this pointer of the event handler */
|
|
Genode::Thread_base *myself = Genode::Thread_base::myself();
|
|
DISPATCHER *vd = static_cast<DISPATCHER *>(myself);
|
|
|
|
/* call event-specific handler function */
|
|
(vd->*FUNC)();
|
|
|
|
/* continue execution of the guest */
|
|
Nova::reply(myself->stack_top());
|
|
}
|
|
|
|
public:
|
|
|
|
Vcpu_dispatcher(size_t stack_size, Cap_connection &cap)
|
|
:
|
|
Thread_base("vCPU dispatcher", stack_size),
|
|
_cap(cap)
|
|
{
|
|
using namespace Genode;
|
|
|
|
/* request creation of a 'local' EC */
|
|
_tid.ec_sel = Native_thread::INVALID_INDEX - 1;
|
|
Thread_base::start();
|
|
|
|
}
|
|
|
|
/**
|
|
* Register virtualization event handler
|
|
*/
|
|
template <unsigned EV, typename DISPATCHER, void (DISPATCHER::*FUNC)()>
|
|
bool register_handler(addr_t exc_base, Nova::Mtd mtd)
|
|
{
|
|
/*
|
|
* Let the compiler generate an instance of a portal entry
|
|
*/
|
|
void (*entry)() = &_portal_entry<EV, DISPATCHER, FUNC>;
|
|
|
|
/* Create the portal at the desired selector index */
|
|
_cap.rcv_window(exc_base + EV);
|
|
|
|
Native_capability thread_cap(tid().ec_sel);
|
|
Native_capability handler =
|
|
_cap.alloc(thread_cap, (Nova::mword_t)entry, mtd.value());
|
|
|
|
return handler.valid() && (exc_base + EV == handler.local_name());
|
|
}
|
|
|
|
/**
|
|
* Unused member of the 'Thread_base' interface
|
|
*
|
|
* Similarly to how 'Rpc_entrypoints' are handled, a 'Vcpu_dispatcher'
|
|
* comes with a custom initialization procedure, which does not call
|
|
* the thread's normal entry function. Instead, the thread's EC gets
|
|
* associated with several portals, each for handling a specific
|
|
* virtualization event.
|
|
*/
|
|
void entry() { }
|
|
|
|
/**
|
|
* Return capability selector of the VCPU's SM and EC
|
|
*
|
|
* The returned number corresponds to the VCPU's semaphore selector.
|
|
* The consecutive number corresponds to the EC. The number returned by
|
|
* this function is used by the VMM code as a unique identifier of the
|
|
* VCPU. I.e., it gets passed as arguments for 'MessageHostOp'
|
|
* operations.
|
|
*/
|
|
Nova::mword_t sel_sm_ec()
|
|
{
|
|
return tid().exc_pt_sel + Nova::SM_SEL_EC;
|
|
}
|
|
};
|
|
|
|
#endif /* _INCLUDE__VMM__VCPU_DISPATCHER_H_ */
|