diff mbox

[PULL,21/29] xics-kvm: enable irqfd for MSI

Message ID 1382736474-32128-22-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf Oct. 25, 2013, 9:27 p.m. UTC 
From: Alexey Kardashevskiy <aik@ozlabs.ru>

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 <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/intc/xics_kvm.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

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: