kvm: move advertising of KVM_CAP_IRQFD to common code
POWER supports irqfds but forgot to advertise them. Some userspace does
not check for the capability, but others check it---thus they work on
x86 and s390 but not POWER.
To avoid that other architectures in the future make the same mistake, let
common code handle KVM_CAP_IRQFD the same way as KVM_CAP_IRQFD_RESAMPLE.
Reported-and-tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Fixes: 297e21053a
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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@ -165,7 +165,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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case KVM_CAP_ONE_REG:
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case KVM_CAP_ENABLE_CAP:
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case KVM_CAP_S390_CSS_SUPPORT:
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case KVM_CAP_IRQFD:
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case KVM_CAP_IOEVENTFD:
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case KVM_CAP_DEVICE_CTRL:
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case KVM_CAP_ENABLE_CAP_VM:
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@ -2744,7 +2744,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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case KVM_CAP_USER_NMI:
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case KVM_CAP_REINJECT_CONTROL:
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case KVM_CAP_IRQ_INJECT_STATUS:
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case KVM_CAP_IRQFD:
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case KVM_CAP_IOEVENTFD:
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case KVM_CAP_IOEVENTFD_NO_LENGTH:
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case KVM_CAP_PIT2:
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@ -2492,6 +2492,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
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case KVM_CAP_SIGNAL_MSI:
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#endif
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#ifdef CONFIG_HAVE_KVM_IRQFD
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case KVM_CAP_IRQFD:
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case KVM_CAP_IRQFD_RESAMPLE:
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#endif
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case KVM_CAP_CHECK_EXTENSION_VM:
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