300 lines
7.0 KiB
C++
300 lines
7.0 KiB
C++
/*
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* \brief Genode/Nova specific VirtualBox SUPLib supplements
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* \author Alexander Boettcher
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* \author Norman Feske
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* \author Christian Helmuth
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*/
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/*
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* Copyright (C) 2013-2014 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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#include <base/semaphore.h>
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#include <util/flex_iterator.h>
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#include <rom_session/connection.h>
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#include <timer_session/connection.h>
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#include <os/attached_rom_dataspace.h>
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#include <trace/timestamp.h>
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#include <vmm/vcpu_thread.h>
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#include <vmm/vcpu_dispatcher.h>
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/* NOVA includes that come with Genode */
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#include <nova/syscalls.h>
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/* VirtualBox includes */
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#include "HMInternal.h" /* enable access to hm.s.* */
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#include "CPUMInternal.h" /* enable access to cpum.s.* */
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#include <VBox/vmm/vm.h>
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#include <VBox/vmm/hm_svm.h>
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#include <VBox/err.h>
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/* Genode's VirtualBox includes */
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#include "vcpu.h"
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#include "vcpu_svm.h"
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#include "vcpu_vmx.h"
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/* libc memory allocator */
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#include <libc_mem_alloc.h>
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static Genode::List<Vcpu_handler> &vcpu_handler_list()
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{
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static Genode::List<Vcpu_handler> _inst;
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return _inst;
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}
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static Vcpu_handler *lookup_vcpu_handler(unsigned int cpu_id)
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{
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for (Vcpu_handler *vcpu_handler = vcpu_handler_list().first();
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vcpu_handler;
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vcpu_handler = vcpu_handler->next())
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if (vcpu_handler->cpu_id() == cpu_id)
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return vcpu_handler;
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return 0;
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}
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/* Genode specific function */
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static Genode::Attached_rom_dataspace hip_rom("hypervisor_info_page");
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void SUPR3QueryHWACCLonGenodeSupport(VM * pVM)
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{
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try {
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Nova::Hip * hip = hip_rom.local_addr<Nova::Hip>();
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pVM->hm.s.svm.fSupported = hip->has_feature_svm();
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pVM->hm.s.vmx.fSupported = hip->has_feature_vmx();
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if (hip->has_feature_svm() || hip->has_feature_vmx()) {
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PINF("Using %s virtualization extension.",
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hip->has_feature_svm() ? "SVM" : "VMX");
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return;
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}
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} catch (...) { /* if we get an exception let hardware support off */ }
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PWRN("No virtualization hardware acceleration available");
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}
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/* VirtualBox SUPLib interface */
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int SUPR3QueryVTxSupported(void) { return VINF_SUCCESS; }
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int SUPR3CallVMMR0Fast(PVMR0 pVMR0, unsigned uOperation, VMCPUID idCpu)
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{
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switch (uOperation) {
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case SUP_VMMR0_DO_HM_RUN:
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Vcpu_handler *vcpu_handler = lookup_vcpu_handler(idCpu);
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Assert(vcpu_handler);
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return vcpu_handler->run_hw(pVMR0);
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}
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return VERR_INTERNAL_ERROR;
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}
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int SUPR3CallVMMR0Ex(PVMR0 pVMR0, VMCPUID idCpu, unsigned
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uOperation, uint64_t u64Arg, PSUPVMMR0REQHDR pReqHdr)
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{
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switch (uOperation) {
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case VMMR0_DO_GVMM_CREATE_VM:
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genode_VMMR0_DO_GVMM_CREATE_VM(pReqHdr);
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return VINF_SUCCESS;
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case VMMR0_DO_GVMM_REGISTER_VMCPU:
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genode_VMMR0_DO_GVMM_REGISTER_VMCPU(pVMR0, idCpu);
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return VINF_SUCCESS;
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case VMMR0_DO_GVMM_SCHED_HALT:
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{
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Vcpu_handler *vcpu_handler = lookup_vcpu_handler(idCpu);
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Assert(vcpu_handler);
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vcpu_handler->halt();
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return VINF_SUCCESS;
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}
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case VMMR0_DO_GVMM_SCHED_WAKE_UP:
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{
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Vcpu_handler *vcpu_handler = lookup_vcpu_handler(idCpu);
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Assert(vcpu_handler);
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vcpu_handler->wake_up();
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return VINF_SUCCESS;
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}
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/* called by 'vmR3HaltGlobal1Halt' */
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case VMMR0_DO_GVMM_SCHED_POLL:
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return VINF_SUCCESS;
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case VMMR0_DO_VMMR0_INIT:
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SUPR3QueryHWACCLonGenodeSupport(reinterpret_cast<VM *>(pVMR0));
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return VINF_SUCCESS;
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case VMMR0_DO_GVMM_DESTROY_VM:
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case VMMR0_DO_VMMR0_TERM:
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case VMMR0_DO_HM_SETUP_VM:
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return VINF_SUCCESS;
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case VMMR0_DO_HM_ENABLE:
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return VINF_SUCCESS;
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case VMMR0_DO_GVMM_SCHED_POKE:
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{
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Vcpu_handler *vcpu_handler = lookup_vcpu_handler(idCpu);
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Assert(vcpu_handler);
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if (vcpu_handler)
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vcpu_handler->recall();
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return VINF_SUCCESS;
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}
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default:
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PERR("SUPR3CallVMMR0Ex: unhandled uOperation %d", uOperation);
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return VERR_GENERAL_FAILURE;
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}
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}
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/**
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* Various support stuff - base-nova specific.
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*/
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uint64_t genode_cpu_hz()
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{
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static uint64_t cpu_freq = 0;
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if (!cpu_freq) {
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try {
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using namespace Genode;
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Rom_connection hip_rom("hypervisor_info_page");
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Nova::Hip * const hip = env()->rm_session()->attach(hip_rom.dataspace());
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cpu_freq = hip->tsc_freq * 1000;
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} catch (...) {
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PERR("could not read out CPU frequency.");
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Genode::Lock lock;
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lock.lock();
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}
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}
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return cpu_freq;
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}
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void genode_update_tsc(void (*update_func)(void), unsigned long update_us)
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{
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using namespace Genode;
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using namespace Nova;
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enum { TSC_FACTOR = 1000ULL };
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Genode::addr_t sem = Thread_base::myself()->native_thread().exc_pt_sel + Nova::SM_SEL_EC;
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unsigned long tsc_khz = (genode_cpu_hz() / 1000) / TSC_FACTOR;
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Trace::Timestamp us_64 = update_us;
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for (;;) {
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update_func();
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Trace::Timestamp now = Trace::timestamp();
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/* block until timeout fires or it gets canceled */
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unsigned long long tsc_absolute = now + us_64 * tsc_khz;
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Genode::uint8_t res = sm_ctrl(sem, SEMAPHORE_DOWN, tsc_absolute);
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if (res != Nova::NOVA_OK && res != Nova::NOVA_TIMEOUT)
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nova_die();
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}
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}
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bool Vmm_memory::revoke_from_vm(Region *r)
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{
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Assert(r);
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using namespace Genode;
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addr_t const vmm_local = (addr_t)r->local_addr<addr_t>();
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Assert(vmm_local);
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Flexpage_iterator fli(vmm_local, r->size(), 0, ~0UL, 0);
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Flexpage revoke_page = fli.page();
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while (revoke_page.valid()) {
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Assert(revoke_page.log2_order >= 12);
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Assert(!(((1UL << revoke_page.log2_order) - 1) & revoke_page.addr));
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using namespace Nova;
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Rights const revoke_rwx(true, true, true);
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Crd crd = Mem_crd(revoke_page.addr >> 12, revoke_page.log2_order - 12,
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revoke_rwx);
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revoke(crd, false);
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/* request next page(s) to be revoked */
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revoke_page = fli.page();
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}
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return true;
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}
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extern "C" void pthread_yield(void)
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{
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/*
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char _name[64];
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Genode::Thread_base::myself()->name(_name, sizeof(_name));
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PERR("pthread_yield %p - '%s'", __builtin_return_address(0), _name);
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Assert(!"pthread_yield called");
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*/
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Nova::ec_ctrl(Nova::EC_YIELD);
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}
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void *operator new (Genode::size_t size, int log2_align)
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{
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static Libc::Mem_alloc_impl heap(Genode::env()->rm_session());
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return heap.alloc(size, log2_align);
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}
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bool create_emt_vcpu(pthread_t * pthread, size_t stack,
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const pthread_attr_t *attr,
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void *(*start_routine)(void *), void *arg,
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Genode::Cpu_session * cpu_session,
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Genode::Affinity::Location location,
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unsigned int cpu_id)
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{
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Nova::Hip * hip = hip_rom.local_addr<Nova::Hip>();
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if (!hip->has_feature_vmx() && !hip->has_feature_svm())
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return false;
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Vcpu_handler *vcpu_handler = 0;
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if (hip->has_feature_vmx())
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vcpu_handler = new (0x10) Vcpu_handler_vmx(stack, attr, start_routine,
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arg, cpu_session, location,
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cpu_id);
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if (hip->has_feature_svm())
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vcpu_handler = new (0x10) Vcpu_handler_svm(stack, attr, start_routine,
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arg, cpu_session, location,
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cpu_id);
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Assert(!(reinterpret_cast<unsigned long>(vcpu_handler) & 0xf));
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vcpu_handler_list().insert(vcpu_handler);
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*pthread = vcpu_handler;
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return true;
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}
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