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authorAlexander Graf <agraf@suse.de>2014-06-06 14:46:05 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2014-06-18 16:54:18 +0200
commit00008418aa22700f6c49e794e79f53aeb157d10f (patch)
treef0f3b71b87ffe17b35ffdad02a48bffe04e6a9ea /kvm-all.c
parentaf44da87e926ff64260b95f4350d338c4fc113ca (diff)
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 <agraf@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c2
1 files changed, 1 insertions, 1 deletions
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;