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On ARM, the MSI msg (address and data) comes along with out-of-band device ID information. The device ID encodes the device that writes the MSI msg. Let's convey the device id in kvm_irq_routing_msi and use KVM_MSI_VALID_DEVID flag value in kvm_irq_routing_entry to indicate the msi devid is populated. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>