[PATCH v4 04/28] VIOMMU: Add get irq info callback to convert irq remapping request

[Chao Gao <chao.gao@intel.com>]

From: Lan Tianyu <tianyu.lan@intel.com>

This patch is to add get_irq_info callback for platform implementation
to convert irq remapping request to irq info (E,G vector, dest, dest_mode
and so on).

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Chao Gao <chao.gao@intel.com>
---
 xen/common/viommu.c          | 16 ++++++++++++++++
 xen/include/asm-x86/viommu.h |  8 ++++++++
 xen/include/xen/viommu.h     |  6 ++++++
 3 files changed, 30 insertions(+)

diff --git a/xen/common/viommu.c b/xen/common/viommu.c
index 53d4b70..9eafdef 100644
--- a/xen/common/viommu.c
+++ b/xen/common/viommu.c
@@ -129,6 +129,22 @@ int viommu_handle_irq_request(const struct domain *d,
     return viommu->ops->handle_irq_request(d, request);
 }
 
+int viommu_get_irq_info(const struct domain *d,
+                        const struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *irq_info)
+{
+    const struct viommu *viommu = d->arch.hvm_domain.viommu;
+
+    if ( !viommu )
+        return -EINVAL;
+
+    ASSERT(viommu->ops);
+    if ( !viommu->ops->get_irq_info )
+        return -EINVAL;
+
+    return viommu->ops->get_irq_info(d, request, irq_info);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/asm-x86/viommu.h b/xen/include/asm-x86/viommu.h
index 01ec80e..3d995ba 100644
--- a/xen/include/asm-x86/viommu.h
+++ b/xen/include/asm-x86/viommu.h
@@ -26,6 +26,14 @@ enum viommu_irq_request_type {
     VIOMMU_REQUEST_IRQ_APIC = 1
 };
 
+struct arch_irq_remapping_info
+{
+    uint8_t dest_mode:1;
+    uint8_t delivery_mode:3;
+    uint8_t  vector;
+    uint32_t dest;
+};
+
 struct arch_irq_remapping_request
 {
     union {
diff --git a/xen/include/xen/viommu.h b/xen/include/xen/viommu.h
index 67e25d5..73b853f 100644
--- a/xen/include/xen/viommu.h
+++ b/xen/include/xen/viommu.h
@@ -32,6 +32,9 @@ struct viommu_ops {
     int (*destroy)(struct viommu *viommu);
     int (*handle_irq_request)(const struct domain *d,
                               const struct arch_irq_remapping_request *request);
+    int (*get_irq_info)(const struct domain *d,
+                        const struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *info);
 };
 
 struct viommu {
@@ -50,6 +53,9 @@ int viommu_destroy_domain(struct domain *d);
 int viommu_domctl(struct domain *d, struct xen_domctl_viommu_op *op);
 int viommu_handle_irq_request(const struct domain *d,
                               const struct arch_irq_remapping_request *request);
+int viommu_get_irq_info(const struct domain *d,
+                        const struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *irq_info);
 #else
 static inline int viommu_destroy_domain(struct domain *d)
 {
-- 
1.8.3.1


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