static void whpx_vcpu_process_async_events(CPUState *cpu)
{
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) &&
!(env->hflags & HF_SMM_MASK)) {
do_cpu_init(x86_cpu);
cpu->vcpu_dirty = true;
vcpu->interruptable = true;
}
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(x86_cpu->apic_state);
}
if (((cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) ||
(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
cpu->halted = false;
}
if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) {
if (!cpu->vcpu_dirty) {
whpx_get_registers(cpu);
}
do_cpu_sipi(x86_cpu);
}
if (cpu->interrupt_request & CPU_INTERRUPT_TPR) {
cpu->interrupt_request &= ~CPU_INTERRUPT_TPR;
if (!cpu->vcpu_dirty) {
whpx_get_registers(cpu);
}
apic_handle_tpr_access_report(x86_cpu->apic_state, env->eip,
env->tpr_access_type);
}
return;
}
/*
* Ask hax kernel module to run the CPU for us till:
* 1. Guest crash or shutdown
* 2. Need QEMU's emulation like guest execute MMIO instruction
* 3. Guest execute HLT
* 4. QEMU have Signal/event pending
* 5. An unknown VMX exit happens
*/
static int hax_vcpu_hax_exec(CPUArchState *env)
{
int ret = 0;
CPUState *cpu = ENV_GET_CPU(env);
X86CPU *x86_cpu = X86_CPU(cpu);
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
struct hax_tunnel *ht = vcpu->tunnel;
if (!hax_enabled()) {
DPRINTF("Trying to vcpu execute at eip:" TARGET_FMT_lx "\n", env->eip);
return 0;
}
cpu->halted = 0;
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(x86_cpu->apic_state);
}
if (cpu->interrupt_request & CPU_INTERRUPT_INIT) {
DPRINTF("\nhax_vcpu_hax_exec: handling INIT for %d\n",
cpu->cpu_index);
do_cpu_init(x86_cpu);
hax_vcpu_sync_state(env, 1);
}
if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) {
DPRINTF("hax_vcpu_hax_exec: handling SIPI for %d\n",
cpu->cpu_index);
hax_vcpu_sync_state(env, 0);
do_cpu_sipi(x86_cpu);
hax_vcpu_sync_state(env, 1);
}
do {
int hax_ret;
if (cpu->exit_request) {
ret = 1;
break;
}
hax_vcpu_interrupt(env);
qemu_mutex_unlock_iothread();
cpu_exec_start(cpu);
hax_ret = hax_vcpu_run(vcpu);
cpu_exec_end(cpu);
qemu_mutex_lock_iothread();
/* Simply continue the vcpu_run if system call interrupted */
if (hax_ret == -EINTR || hax_ret == -EAGAIN) {
DPRINTF("io window interrupted\n");
continue;
}
if (hax_ret < 0) {
fprintf(stderr, "vcpu run failed for vcpu %x\n", vcpu->vcpu_id);
abort();
}
switch (ht->_exit_status) {
case HAX_EXIT_IO:
ret = hax_handle_io(env, ht->pio._df, ht->pio._port,
ht->pio._direction,
ht->pio._size, ht->pio._count, vcpu->iobuf);
break;
case HAX_EXIT_FAST_MMIO:
ret = hax_handle_fastmmio(env, (struct hax_fastmmio *) vcpu->iobuf);
break;
/* Guest state changed, currently only for shutdown */
case HAX_EXIT_STATECHANGE:
fprintf(stdout, "VCPU shutdown request\n");
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
hax_vcpu_sync_state(env, 0);
ret = 1;
break;
case HAX_EXIT_UNKNOWN_VMEXIT:
fprintf(stderr, "Unknown VMX exit %x from guest\n",
ht->_exit_reason);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
hax_vcpu_sync_state(env, 0);
cpu_dump_state(cpu, stderr, fprintf, 0);
ret = -1;
break;
case HAX_EXIT_HLT:
if (!(cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
!(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
/* hlt instruction with interrupt disabled is shutdown */
env->eflags |= IF_MASK;
cpu->halted = 1;
cpu->exception_index = EXCP_HLT;
ret = 1;
}
break;
/* these situations will continue to hax module */
case HAX_EXIT_INTERRUPT:
case HAX_EXIT_PAUSED:
break;
case HAX_EXIT_MMIO:
/* Should not happen on UG system */
fprintf(stderr, "HAX: unsupported MMIO emulation\n");
ret = -1;
break;
case HAX_EXIT_REAL:
/* Should not happen on UG system */
fprintf(stderr, "HAX: unimplemented real mode emulation\n");
ret = -1;
break;
default:
fprintf(stderr, "Unknown exit %x from HAX\n", ht->_exit_status);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
hax_vcpu_sync_state(env, 0);
cpu_dump_state(cpu, stderr, fprintf, 0);
ret = 1;
break;
}
} while (!ret);
if (cpu->exit_request) {
cpu->exit_request = 0;
cpu->exception_index = EXCP_INTERRUPT;
}
return ret < 0;
}
