kvm: x86: add support for KVM_CAP_SPLIT_IRQCHIP

This patch adds support for split IRQ chip mode. When
KVM_CAP_SPLIT_IRQCHIP is enabled:

    1.) The PIC, PIT, and IOAPIC are implemented in userspace while
    the LAPIC is implemented by KVM.

    2.) The software IOAPIC delivers interrupts to the KVM LAPIC via
    kvm_set_irq. Interrupt delivery is configured via the MSI routing
    table, for which routes are reserved in target-i386/kvm.c then
    configured in hw/intc/ioapic.c

    3.) KVM delivers IOAPIC EOIs via a new exit KVM_EXIT_IOAPIC_EOI,
    which is handled in target-i386/kvm.c and relayed to the software
    IOAPIC via ioapic_eoi_broadcast.

Signed-off-by: Matt Gingell <gingell@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 6a498a20d3..319497e966 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -182,7 +182,7 @@ static void pc_init1(MachineState *machine,
     }
 
     gsi_state = g_malloc0(sizeof(*gsi_state));
-    if (kvm_irqchip_in_kernel()) {
+    if (kvm_ioapic_in_kernel()) {
         kvm_pc_setup_irq_routing(pci_enabled);
         gsi = qemu_allocate_irqs(kvm_pc_gsi_handler, gsi_state,
                                  GSI_NUM_PINS);
@@ -206,7 +206,7 @@ static void pc_init1(MachineState *machine,
     }
     isa_bus_irqs(isa_bus, gsi);
 
-    if (kvm_irqchip_in_kernel()) {
+    if (kvm_pic_in_kernel()) {
         i8259 = kvm_i8259_init(isa_bus);
     } else if (xen_enabled()) {
         i8259 = xen_interrupt_controller_init();