From b47506f55cf4fb01d04e3c76c77ca09b75cf75c6 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 (cherry picked from commit 00008418aa22700f6c49e794e79f53aeb157d10f) Signed-off-by: Michael Roth --- kvm-all.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kvm-all.c b/kvm-all.c index 9f18ea38b9..7e05f08c2e 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -965,7 +965,7 @@ 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;