crosvm: Add plumbing for split-irqchip interrupts

Devices use irqfd to inject interrupts, we listen to them in the main
thread and activate userspace pic/ioapic accordingly.

BUG=chromium:908689
TEST=lanuch linux guest with `--split-irqchip` flag

Change-Id: If30d17ce7ec9e26dba782c89cc1b9b2ff897a70d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1945798
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Zhuocheng Ding <zhuocheng.ding@intel.corp-partner.google.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/aarch64/src/lib.rs b/aarch64/src/lib.rs
index d4c4a50..f8a36b9 100644
--- a/aarch64/src/lib.rs
+++ b/aarch64/src/lib.rs
@@ -245,9 +245,14 @@ impl arch::LinuxArch for AArch64 {
 
         let pci_devices = create_devices(&mem, &mut vm, &mut resources, &exit_evt)
             .map_err(|e| Error::CreateDevices(Box::new(e)))?;
-        let (pci, pci_irqs, pid_debug_label_map) =
-            arch::generate_pci_root(pci_devices, &mut mmio_bus, &mut resources, &mut vm)
-                .map_err(Error::CreatePciRoot)?;
+        let (pci, pci_irqs, pid_debug_label_map) = arch::generate_pci_root(
+            pci_devices,
+            &mut None,
+            &mut mmio_bus,
+            &mut resources,
+            &mut vm,
+        )
+        .map_err(Error::CreatePciRoot)?;
         let pci_bus = Arc::new(Mutex::new(PciConfigMmio::new(pci)));
 
         // ARM doesn't really use the io bus like x86, so just create an empty bus.
@@ -317,6 +322,7 @@ impl arch::LinuxArch for AArch64 {
             vcpu_affinity,
             irq_chip,
             split_irqchip: None,
+            gsi_relay: None,
             io_bus,
             mmio_bus,
             pid_debug_label_map,