From c0194a00b0beb66814756ee255a8a86b2a92c27e Mon Sep 17 00:00:00 2001 From: Jens Freimann Date: Mon, 27 Jul 2015 16:53:27 +0200 Subject: s390x/kvm: make setting of in-kernel irq routes more efficient When we add new adapter routes we call kvm_irqchip_add_route() for every virtqueue and in the same step also do the KVM_SET_GSI_ROUTING ioctl. This is unnecessary costly as the interface allows us to set multiple routes in one go. Let's first add all routes to the table stored in the global kvm_state and then do the ioctl to commit the routes to the in-kernel irqchip. This saves us several ioctls to the kernel where for each call a list is reallocated and populated. Signed-off-by: Jens Freimann Reviewed-by: David Hildenbrand Acked-by: Paolo Bonzini Signed-off-by: Cornelia Huck --- hw/intc/s390_flic_kvm.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'hw/intc') diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c index b471e7a41e..48714f96a3 100644 --- a/hw/intc/s390_flic_kvm.c +++ b/hw/intc/s390_flic_kvm.c @@ -228,6 +228,8 @@ static int kvm_s390_add_adapter_routes(S390FLICState *fs, routes->gsi[i] = ret; routes->adapter.ind_offset++; } + kvm_irqchip_commit_routes(kvm_state); + /* Restore passed-in structure to original state. */ routes->adapter.ind_offset = ind_offset; return 0; -- cgit v1.2.3