This enables IRQFD support for sPAPR. The feature decreases the latency
of interrupt handling.
To enable IRQFD for MSI, this sets kvm_gsi_direct_mapping to true which
enables direct MSI mapping.
To enable IRQFD for LSI (level triggered INTx interrupts), a PCI host bus
callback is required. The patch for that is coming next.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
hw/intc/xics_kvm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
index a2ccafa..c203646 100644
--- a/hw/intc/xics_kvm.c
+++ b/hw/intc/xics_kvm.c
@@ -441,6 +441,12 @@ static void xics_kvm_realize(DeviceState *dev, Error
**errp)
goto fail;
}
}
+
+ kvm_kernel_irqchip = true;
+ kvm_irqfds_allowed = true;
+ kvm_msi_via_irqfd_allowed = true;
+ kvm_gsi_direct_mapping = true;
+
return;
fail:
--
1.8.4.rc4
