70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
/*
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* \brief Kernel backend for virtual machines
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* \author Stefan Kalkowski
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* \author Reto Buerki
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* \author Adrian-Ken Rueegsegger
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* \date 2015-06-03
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*/
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/*
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* Copyright (C) 2015-2017 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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#include <assertion.h>
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#include <platform_pd.h>
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#include <kernel/cpu.h>
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#include <kernel/vm.h>
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#include <cpu/cpu_state.h>
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#include <pic.h>
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Kernel::Vm::Vm(void * const state, Kernel::Signal_context * const context,
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void * const)
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: Cpu_job(Cpu_priority::MIN, 0),
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_state((Genode::Vm_state * const) state),
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_context(context),
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_table(nullptr)
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{
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affinity(cpu_pool()->primary_cpu());
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}
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Kernel::Vm::~Vm() { }
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void Kernel::Vm::exception(Cpu & cpu)
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{
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pause();
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if (_state->trapno == 200) {
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_context->submit(1);
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return;
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}
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if (_state->trapno >= Genode::Cpu_state::INTERRUPTS_START &&
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_state->trapno <= Genode::Cpu_state::INTERRUPTS_END) {
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pic()->irq_occurred(_state->trapno);
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_interrupt(cpu.id());
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_context->submit(1);
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return;
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}
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Genode::warning("VM: triggered unknown exception ", _state->trapno,
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" with error code ", _state->errcode);
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ASSERT_NEVER_CALLED;
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}
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void Kernel::Vm::proceed(Cpu & cpu)
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{
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cpu.tss.ist[0] = (addr_t)_state + sizeof(Genode::Cpu_state);
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asm volatile("sti \n"
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"mov $1, %rax \n"
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"vmcall");
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}
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void Kernel::Vm::inject_irq(unsigned) { }
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