Commit 96b14536 authored by Cornelia Huck's avatar Cornelia Huck Committed by Christian Borntraeger

virtio-ccw: virtio-ccw adapter interrupt support.

Implement the new CCW_CMD_SET_IND_ADAPTER command and try to enable
adapter interrupts for every device on the first startup. If the host
does not support adapter interrupts, fall back to normal I/O interrupts.

virtio-ccw adapter interrupts use the same isc as normal I/O subchannels
and share a summary indicator for all devices sharing the same indicator
area.

Indicator bits for the individual virtqueues may be contained in the same
indicator area for different devices.
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 84ec96a6
...@@ -53,6 +53,7 @@ enum interruption_class { ...@@ -53,6 +53,7 @@ enum interruption_class {
IRQIO_PCI, IRQIO_PCI,
IRQIO_MSI, IRQIO_MSI,
IRQIO_VIR, IRQIO_VIR,
IRQIO_VAI,
NMI_NMI, NMI_NMI,
CPU_RST, CPU_RST,
NR_ARCH_IRQS NR_ARCH_IRQS
......
...@@ -84,6 +84,7 @@ static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = { ...@@ -84,6 +84,7 @@ static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = {
[IRQIO_PCI] = {.name = "PCI", .desc = "[I/O] PCI Interrupt" }, [IRQIO_PCI] = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
[IRQIO_MSI] = {.name = "MSI", .desc = "[I/O] MSI Interrupt" }, [IRQIO_MSI] = {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
[IRQIO_VIR] = {.name = "VIR", .desc = "[I/O] Virtual I/O Devices"}, [IRQIO_VIR] = {.name = "VIR", .desc = "[I/O] Virtual I/O Devices"},
[IRQIO_VAI] = {.name = "VAI", .desc = "[I/O] Virtual I/O Devices AI"},
[NMI_NMI] = {.name = "NMI", .desc = "[NMI] Machine Check"}, [NMI_NMI] = {.name = "NMI", .desc = "[NMI] Machine Check"},
[CPU_RST] = {.name = "RST", .desc = "[CPU] CPU Restart"}, [CPU_RST] = {.name = "RST", .desc = "[CPU] CPU Restart"},
}; };
......
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