From 9554233c9b8fe7d94dfa53db09ce3d186f2e8b9e Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Thu, 26 Sep 2013 16:18:47 +1000 Subject: xics-kvm: enable irqfd for MSI 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 Signed-off-by: Alexander Graf --- hw/intc/xics_kvm.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'hw/intc') diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c index a2ccafa2d3..c203646bd6 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: -- cgit v1.2.1