static void continue_new_vcpu(struct vcpu *prev)
{
schedule_tail(prev);
if ( is_idle_vcpu(current) )
reset_stack_and_jump(idle_loop);
else if ( is_32bit_domain(current->domain) )
/* check_wakeup_from_wait(); */
reset_stack_and_jump(return_to_new_vcpu32);
else
/* check_wakeup_from_wait(); */
reset_stack_and_jump(return_to_new_vcpu64);
}
void startup_cpu_idle_loop(void)
{
struct vcpu *v = current;
ASSERT(is_idle_vcpu(v));
cpu_set(smp_processor_id(), v->domain->domain_dirty_cpumask);
cpu_set(smp_processor_id(), v->vcpu_dirty_cpumask);
/* Finally get off the boot stack. */
reset_stack_and_jump(idle_loop);
}
void startup_cpu_idle_loop(void)
{
struct vcpu *v = current;
ASSERT(is_idle_vcpu(v));
/* TODO
cpumask_set_cpu(v->processor, v->domain->domain_dirty_cpumask);
cpumask_set_cpu(v->processor, v->vcpu_dirty_cpumask);
*/
reset_stack_and_jump(idle_loop);
}
void vmx_do_resume(struct vcpu *v)
{
bool_t debug_state;
if ( v->arch.hvm_vmx.active_cpu == smp_processor_id() )
{
if ( v->arch.hvm_vmx.vmcs != this_cpu(current_vmcs) )
vmx_load_vmcs(v);
}
else
{
/*
* For pass-through domain, guest PCI-E device driver may leverage the
* "Non-Snoop" I/O, and explicitly WBINVD or CLFLUSH to a RAM space.
* Since migration may occur before WBINVD or CLFLUSH, we need to
* maintain data consistency either by:
* 1: flushing cache (wbinvd) when the guest is scheduled out if
* there is no wbinvd exit, or
* 2: execute wbinvd on all dirty pCPUs when guest wbinvd exits.
*/
if ( !list_empty(&(domain_hvm_iommu(v->domain)->pdev_list)) &&
!cpu_has_wbinvd_exiting )
{
int cpu = v->arch.hvm_vmx.active_cpu;
if ( cpu != -1 )
on_selected_cpus(cpumask_of_cpu(cpu), wbinvd_ipi, NULL, 1, 1);
}
vmx_clear_vmcs(v);
vmx_load_vmcs(v);
hvm_migrate_timers(v);
vmx_set_host_env(v);
}
debug_state = v->domain->debugger_attached;
if ( unlikely(v->arch.hvm_vcpu.debug_state_latch != debug_state) )
{
unsigned long intercepts = __vmread(EXCEPTION_BITMAP);
unsigned long mask = (1U << TRAP_debug) | (1U << TRAP_int3);
v->arch.hvm_vcpu.debug_state_latch = debug_state;
if ( debug_state )
intercepts |= mask;
else
intercepts &= ~mask;
__vmwrite(EXCEPTION_BITMAP, intercepts);
}
hvm_do_resume(v);
reset_stack_and_jump(vmx_asm_do_vmentry);
}
static void noreturn continue_nonidle_domain(struct vcpu *v)
{
check_wakeup_from_wait();
reset_stack_and_jump(ret_from_intr);
}
