On Thu, 19 Apr 2018 05:30:40 -0700 Wanpeng Li <kernellwp@xxxxxxxxx> wrote: > 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); So, this basically means we have 4096 everywhere, no?
