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authorCornelia Huck <cornelia.huck@de.ibm.com>2014-02-25 15:48:01 +0400
committerCornelia Huck <cornelia.huck@de.ibm.com>2014-03-21 16:43:13 +0400
commitf3f710bc64e121c10c67ce58c893d3bc8c72abe4 (patch)
tree6246031ba4c999992750fadddc92fcb5408e593a /include/linux/kvm_host.h
parent84223598778ba08041f4297fda485df83414d57e (diff)
downloadlinux-f3f710bc64e121c10c67ce58c893d3bc8c72abe4.tar.xz
KVM: Bump KVM_MAX_IRQ_ROUTES for s390
The maximum number for irq routes is currently 1024, which is a bit on the small size for s390: We support up to 4 x 64k virtual devices with up to 64 queues, and we need one route for each of the queues if we want to operate it via irqfd. Let's bump this to 4k on s390 for now, as this at least covers the saner setups. We need to find a more general solution, though, as we can't just grow the routing table indefinitly. Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index da7510b4c6ad..7d21cf9f4380 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -922,7 +922,11 @@ static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+#ifdef CONFIG_S390
+#define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
+#else
#define KVM_MAX_IRQ_ROUTES 1024
+#endif
int kvm_setup_default_irq_routing(struct kvm *kvm);
int kvm_set_irq_routing(struct kvm *kvm,