[Xen-devel] [RFC PATCH 2/23] DMOP: Introduce new DMOP commands for vIOMMU support

[Lan Tianyu <tianyu.lan@xxxxxxxxx>]

This patch is to introduce create, destroy and query capabilities
command for vIOMMU. vIOMMU layer will deal with requests and call
arch vIOMMU ops.

Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
 xen/arch/x86/hvm/dm.c          | 29 +++++++++++++++++++++++++++++
 xen/include/public/hvm/dm_op.h | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c
index 2122c45..2b28f70 100644
--- a/xen/arch/x86/hvm/dm.c
+++ b/xen/arch/x86/hvm/dm.c
@@ -491,6 +491,35 @@ static int dm_op(domid_t domid,
         break;
     }
 
+    case XEN_DMOP_create_viommu:
+    {
+        struct xen_dm_op_create_viommu *data =
+            &op.u.create_viommu;
+
+        rc = viommu_create(d, data->base_address, data->length, 
data->capabilities);
+        if (rc >= 0) {
+            data->viommu_id = rc;
+            rc = 0;
+        }
+        break;
+    }
+    case XEN_DMOP_destroy_viommu:
+    {
+        const struct xen_dm_op_destroy_viommu *data =
+            &op.u.destroy_viommu;
+
+        rc = viommu_destroy(d, data->viommu_id);
+        break;
+    }
+    case XEN_DMOP_query_viommu_caps:
+    {
+        struct xen_dm_op_query_viommu_caps *data =
+            &op.u.query_viommu_caps;
+
+        data->caps = viommu_query_caps(d);
+        rc = 0;
+        break;
+    }
     default:
         rc = -EOPNOTSUPP;
         break;
diff --git a/xen/include/public/hvm/dm_op.h b/xen/include/public/hvm/dm_op.h
index f54cece..b8c7359 100644
--- a/xen/include/public/hvm/dm_op.h
+++ b/xen/include/public/hvm/dm_op.h
@@ -318,6 +318,42 @@ struct xen_dm_op_inject_msi {
     uint64_aligned_t addr;
 };
 
+/*
+ * XEN_DMOP_create_viommu: Create vIOMMU device.
+ */
+#define XEN_DMOP_create_viommu 15
+
+struct xen_dm_op_create_viommu {
+    /* IN - MMIO base address of vIOMMU */
+    uint64_t base_address;
+    /* IN - Length of MMIO region */
+    uint64_t length;
+    /* IN - Capabilities with which we want to create */
+    uint64_t capabilities;
+    /* OUT - vIOMMU identity */
+    uint32_t viommu_id;
+};
+
+/*
+ * XEN_DMOP_destroy_viommu: Destroy vIOMMU device.
+ */
+#define XEN_DMOP_destroy_viommu 16
+
+struct xen_dm_op_destroy_viommu {
+    /* OUT - vIOMMU identity */
+    uint32_t viommu_id;
+};
+
+/*
+ * XEN_DMOP_q_viommu: Query vIOMMU capabilities.
+ */
+#define XEN_DMOP_query_viommu_caps 17
+
+struct xen_dm_op_query_viommu_caps {
+    /* OUT - vIOMMU Capabilities*/
+    uint64_t caps;
+};
+
 struct xen_dm_op {
     uint32_t op;
     uint32_t pad;
@@ -336,6 +372,9 @@ struct xen_dm_op {
         struct xen_dm_op_set_mem_type set_mem_type;
         struct xen_dm_op_inject_event inject_event;
         struct xen_dm_op_inject_msi inject_msi;
+        struct xen_dm_op_create_viommu create_viommu;
+        struct xen_dm_op_destroy_viommu destroy_viommu;
+        struct xen_dm_op_query_viommu_caps query_viommu_caps;
     } u;
 };
 
-- 
1.8.3.1


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