From: Wanpeng Li <wanpengli@xxxxxxxxxxx> Our virtual machines make use of device assignment by configuring 12 NVMe disks for high I/O performance. Each NVMe device has 129 MSI-X Table entries: Capabilities: [50] MSI-X: Enable+ Count=129 Masked-Vector table: BAR=0 offset=00002000 The windows virtual machines fail to boot since they will map the number of MSI-table entries that the NVMe hardware reported to the bus to msi routing table, this will exceed the 1024. This patch extends MAX_IRQ_ROUTES to 4096, In the future this might be extended if needed. Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> Cc: Tonny Lu <tonnylu@xxxxxxxxxxx> Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> Signed-off-by: Tonny Lu <tonnylu@xxxxxxxxxxx> --- include/linux/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6930c63..815ae66 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1050,7 +1050,7 @@ static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) #elif defined(CONFIG_ARM64) #define KVM_MAX_IRQ_ROUTES 4096 #else -#define KVM_MAX_IRQ_ROUTES 1024 +#define KVM_MAX_IRQ_ROUTES 4096 #endif bool kvm_arch_can_set_irq_routing(struct kvm *kvm); -- 2.7.4
