diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2013-09-26 16:18:47 +1000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-10-25 23:25:47 +0200 |
| commit | 9554233c9b8fe7d94dfa53db09ce3d186f2e8b9e (patch) | |
| tree | 4ab77e23fef9bf6db87695a400f83a5639edf374 /hw/intc | |
| parent | 5d87e4b74a0100fbb7970edaa3449eb04b06f782 (diff) | |
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 <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw/intc')
| -rw-r--r-- | hw/intc/xics_kvm.c | 6 |
1 files changed, 6 insertions, 0 deletions
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: |