On Mon, 30 Nov 2015 12:40:45 +0300 Pavel Fedin <p.fedin@xxxxxxxxxxx> wrote: > Now at least ARM is able to determine whether the machine has > virtualization support for irqchip or not at runtime. Obviously, > irqfd requires irqchip. > > Signed-off-by: Pavel Fedin <p.fedin@xxxxxxxxxxx> > --- > virt/kvm/kvm_main.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 7873d6d..a057d5e 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -2716,13 +2716,15 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) > case KVM_CAP_INTERNAL_ERROR_DATA: > #ifdef CONFIG_HAVE_KVM_MSI > case KVM_CAP_SIGNAL_MSI: > + /* Fallthrough */ > #endif > + case KVM_CAP_CHECK_EXTENSION_VM: > + return 1; > #ifdef CONFIG_HAVE_KVM_IRQFD > case KVM_CAP_IRQFD: > case KVM_CAP_IRQFD_RESAMPLE: > + return kvm_vm_ioctl_check_extension(kvm, KVM_CAP_IRQCHIP); This won't work for s390, as it doesn't have KVM_CAP_IRQCHIP but KVM_CAP_S390_IRQCHIP (which needs to be enabled). > #endif > - case KVM_CAP_CHECK_EXTENSION_VM: > - return 1; > #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING > case KVM_CAP_IRQ_ROUTING: > return KVM_MAX_IRQ_ROUTES; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
