kvm: move advertising of KVM_CAP_IRQFD to common code
authorPaolo Bonzini <pbonzini@redhat.com>
Thu, 5 Mar 2015 10:54:46 +0000 (11:54 +0100)
committerMarcelo Tosatti <mtosatti@redhat.com>
Wed, 11 Mar 2015 00:18:59 +0000 (21:18 -0300)
commitdc9be0fac70a2ad86e31a81372bb0bdfb6945353
treed515c5004b6f58412e3dac08729afa614aca0b9b
parentaffb8172de395a6e1db52ed9790ca0456d8c29a9
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: 297e21053a52f060944e9f0de4c64fad9bcd72fc
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
arch/s390/kvm/kvm-s390.c
arch/x86/kvm/x86.c
virt/kvm/kvm_main.c