Add new group KVM_DEV_VFIO_INTERRUPT and command
KVM_DEV_VFIO_DEVIE_POSTING_IRQ related to it.
This is used for VT-d Posted-Interrupts setup.
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
---
Documentation/virtual/kvm/devices/vfio.txt | 8 ++++++++
include/uapi/linux/kvm.h | 14 ++++++++++++++
2 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/Documentation/virtual/kvm/devices/vfio.txt b/Documentation/virtual/kvm/devices/vfio.txt
index ef51740..bd99176 100644
--- a/Documentation/virtual/kvm/devices/vfio.txt
+++ b/Documentation/virtual/kvm/devices/vfio.txt
@@ -13,6 +13,7 @@ VFIO-group is held by KVM.
Groups:
KVM_DEV_VFIO_GROUP
+ KVM_DEV_VFIO_INTERRUPT
KVM_DEV_VFIO_GROUP attributes:
KVM_DEV_VFIO_GROUP_ADD: Add a VFIO group to VFIO-KVM device tracking
@@ -20,3 +21,10 @@ KVM_DEV_VFIO_GROUP attributes:
For each, kvm_device_attr.addr points to an int32_t file descriptor
for the VFIO group.
+
+KVM_DEV_VFIO_INTERRUPT attributes:
+ KVM_DEV_VFIO_INTERRUPT_POSTING_IRQ: Set up the interrupt configuration for
+VT-d Posted-Interrrupts
+
+For each, kvm_device_attr.addr points to struct kvm_posted_intr, which
+include the needed information for VT-d Posted-Interrupts setup.
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 6076882..5544fcc 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -943,9 +943,23 @@ struct kvm_device_attr {
__u64 addr; /* userspace address of attr data */
};
+struct virq_info {
+ __u32 index; /* index of the msi/msix entry */
+ int virq; /* virq of the interrupt */
+};
+
+struct kvm_posted_intr {
+ __u32 fd; /* file descriptor of the VFIO device */
+ __u32 count;
+ bool msix;
+ struct virq_info virq_info[0];
+};
+
#define KVM_DEV_VFIO_GROUP 1
#define KVM_DEV_VFIO_GROUP_ADD 1
#define KVM_DEV_VFIO_GROUP_DEL 2
+#define KVM_DEV_VFIO_INTERRUPT 2
+#define KVM_DEV_VFIO_INTERRUPT_POSTING_IRQ 1
enum kvm_device_type {
KVM_DEV_TYPE_FSL_MPIC_20 = 1,
--
1.7.1
--
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