[PATCH v6 12/16] asm-generic/hyperv: update hv_interrupt_entry

[Wei Liu]

We will soon use the same structure to handle IO-APIC interrupts as
well. Introduce an enum to identify the source and a data structure for
IO-APIC RTE.

While at it, update pci-hyperv.c to use the enum.

No functional change.

Signed-off-by: Wei Liu <wei....@kernel.org>
Acked-by: Rob Herring <r...@kernel.org>
Reviewed-by: Michael Kelley <mikel...@microsoft.com>
---
 drivers/pci/controller/pci-hyperv.c |  2 +-
 include/asm-generic/hyperv-tlfs.h   | 36 +++++++++++++++++++++++++++--
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pci-hyperv.c 
b/drivers/pci/controller/pci-hyperv.c
index 6db8d96a78eb..87aa62ee0368 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1216,7 +1216,7 @@ static void hv_irq_unmask(struct irq_data *data)
        params = &hbus->retarget_msi_interrupt_params;
        memset(params, 0, sizeof(*params));
        params->partition_id = HV_PARTITION_ID_SELF;
-       params->int_entry.source = 1; /* MSI(-X) */
+       params->int_entry.source = HV_INTERRUPT_SOURCE_MSI;
        hv_set_msi_entry_from_desc(&params->int_entry.msi_entry, msi_desc);
        params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
                           (hbus->hdev->dev_instance.b[4] << 16) |
diff --git a/include/asm-generic/hyperv-tlfs.h 
b/include/asm-generic/hyperv-tlfs.h
index 4669f9a4e1f1..94c7d77bbf68 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -480,6 +480,11 @@ struct hv_create_vp {
        u64 flags;
 } __packed;
 
+enum hv_interrupt_source {
+       HV_INTERRUPT_SOURCE_MSI = 1, /* MSI and MSI-X */
+       HV_INTERRUPT_SOURCE_IOAPIC,
+};
+
 union hv_msi_address_register {
        u32 as_uint32;
        struct {
@@ -513,10 +518,37 @@ union hv_msi_entry {
        } __packed;
 };
 
+union hv_ioapic_rte {
+       u64 as_uint64;
+
+       struct {
+               u32 vector:8;
+               u32 delivery_mode:3;
+               u32 destination_mode:1;
+               u32 delivery_status:1;
+               u32 interrupt_polarity:1;
+               u32 remote_irr:1;
+               u32 trigger_mode:1;
+               u32 interrupt_mask:1;
+               u32 reserved1:15;
+
+               u32 reserved2:24;
+               u32 destination_id:8;
+       };
+
+       struct {
+               u32 low_uint32;
+               u32 high_uint32;
+       };
+} __packed;
+
 struct hv_interrupt_entry {
-       u32 source;                     /* 1 for MSI(-X) */
+       u32 source;
        u32 reserved1;
-       union hv_msi_entry msi_entry;
+       union {
+               union hv_msi_entry msi_entry;
+               union hv_ioapic_rte ioapic_rte;
+       };
 } __packed;
 
 /*
-- 
2.20.1