KVM: s390: Add a channel I/O based virtio transport driver.

Add a driver for kvm guests that matches virtual ccw devices provided
by the host as virtio bridge devices.

These virtio-ccw devices use a special set of channel commands in order
to perform virtio functions.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index e6972f85d2b0..aa6d0d74cec9 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -35,6 +35,7 @@ enum interruption_class {
         IOINT_CSC,
         IOINT_PCI,
         IOINT_MSI,
+        IOINT_VIR,
         NMI_NMI,
         NR_IRQS,
 };
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index bf24293970ce..a9806ea3ebd7 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -60,6 +60,7 @@ static const struct irq_class intrclass_names[] = {
         [IOINT_CSC]  = {.name = "CSC", .desc = "[I/O] CHSC Subchannel"},
         [IOINT_PCI]  = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
         [IOINT_MSI] =  {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
+        [IOINT_VIR]  = {.name = "VIR", .desc = "[I/O] Virtual I/O Devices"},
         [NMI_NMI]    = {.name = "NMI", .desc = "[NMI] Machine Check"},
 };