From 00008418aa22700f6c49e794e79f53aeb157d10f Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Fri, 6 Jun 2014 14:46:05 +0200 Subject: [PATCH] KVM: Fix GSI number space limit KVM tells us the number of GSIs it can handle inside the kernel. That value is basically KVM_MAX_IRQ_ROUTES. However when we try to set the GSI mapping table, it checks for r = -EINVAL; if (routing.nr >= KVM_MAX_IRQ_ROUTES) goto out; erroring out even when we're only using all of the GSIs. To make sure we never hit that limit, let's reduce the number of GSIs we get from KVM by one. Cc: qemu-stable@nongnu.org Signed-off-by: Alexander Graf Signed-off-by: Paolo Bonzini --- kvm-all.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kvm-all.c b/kvm-all.c index 4e19eff0ef..56a251bf8e 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -938,7 +938,7 @@ void kvm_init_irq_routing(KVMState *s) { int gsi_count, i; - gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); + gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; if (gsi_count > 0) { unsigned int gsi_bits, i; -- 2.11.4.GIT