ping, 2018-04-27 8:55 GMT+08:00 Wanpeng Li <kernellwp@xxxxxxxxx>: > 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 > for all archs, in the future this might be extended again if needed. > > Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx> > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> > Cc: Cornelia Huck <cohuck@xxxxxxxxxx> > Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx> > Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> > Signed-off-by: Tonny Lu <tonnylu@xxxxxxxxxxx> > --- > v2 -> v3: > * update comments in the code > v1 -> v2: > * extend MAX_IRQ_ROUTES to 4096 for all archs > > include/linux/kvm_host.h | 8 +------- > 1 file changed, 1 insertion(+), 7 deletions(-) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index 6930c63..6d6e79c 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -1045,13 +1045,7 @@ 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... > -#elif defined(CONFIG_ARM64) > -#define KVM_MAX_IRQ_ROUTES 4096 > -#else > -#define KVM_MAX_IRQ_ROUTES 1024 > -#endif > +#define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */ > > bool kvm_arch_can_set_irq_routing(struct kvm *kvm); > int kvm_set_irq_routing(struct kvm *kvm, > -- > 2.7.4 >
