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[RFC,1/6] KVM: api: add kvm_irq_routing_extended_msi

Message ID 1434649258-27065-2-git-send-email-eric.auger@linaro.org
State New
Headers show

Commit Message

Auger Eric June 18, 2015, 5:40 p.m. UTC 
On ARM, the MSI msg (address and data) comes along with
out-of-band device ID information. The device ID encodes the device
that composes the MSI msg. Let's create a new routing entry structure
that enables to encode that information on top of standard MSI
message

Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
 Documentation/virtual/kvm/api.txt | 9 +++++++++
 include/uapi/linux/kvm.h          | 9 +++++++++
 2 files changed, 18 insertions(+)
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Patch

diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index d20fd94..bcec91e 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1419,6 +1419,7 @@  struct kvm_irq_routing_entry {
 		struct kvm_irq_routing_irqchip irqchip;
 		struct kvm_irq_routing_msi msi;
 		struct kvm_irq_routing_s390_adapter adapter;
+		struct kvm_irq_routing_extended_msi ext_msi;
 		__u32 pad[8];
 	} u;
 };
@@ -1427,6 +1428,7 @@  struct kvm_irq_routing_entry {
 #define KVM_IRQ_ROUTING_IRQCHIP 1
 #define KVM_IRQ_ROUTING_MSI 2
 #define KVM_IRQ_ROUTING_S390_ADAPTER 3
+#define KVM_IRQ_ROUTING_EXTENDED_MSI 4
 
 No flags are specified so far, the corresponding field must be set to zero.
 
@@ -1442,6 +1444,13 @@  struct kvm_irq_routing_msi {
 	__u32 pad;
 };
 
+struct kvm_irq_routing_extended_msi {
+	__u32 address_lo;
+	__u32 address_hi;
+	__u32 data;
+	__u32 devid;
+};
+
 struct kvm_irq_routing_s390_adapter {
 	__u64 ind_addr;
 	__u64 summary_addr;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 2a23705..e3f65a0 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -829,6 +829,13 @@  struct kvm_irq_routing_msi {
 	__u32 pad;
 };
 
+struct kvm_irq_routing_extended_msi {
+	__u32 address_lo;
+	__u32 address_hi;
+	__u32 data;
+	__u32 devid;
+};
+
 struct kvm_irq_routing_s390_adapter {
 	__u64 ind_addr;
 	__u64 summary_addr;
@@ -841,6 +848,7 @@  struct kvm_irq_routing_s390_adapter {
 #define KVM_IRQ_ROUTING_IRQCHIP 1
 #define KVM_IRQ_ROUTING_MSI 2
 #define KVM_IRQ_ROUTING_S390_ADAPTER 3
+#define KVM_IRQ_ROUTING_EXTENDED_MSI 4
 
 struct kvm_irq_routing_entry {
 	__u32 gsi;
@@ -851,6 +859,7 @@  struct kvm_irq_routing_entry {
 		struct kvm_irq_routing_irqchip irqchip;
 		struct kvm_irq_routing_msi msi;
 		struct kvm_irq_routing_s390_adapter adapter;
+		struct kvm_irq_routing_extended_msi ext_msi;
 		__u32 pad[8];
 	} u;
 };