[Xen-devel] [PATCH v4 03/28] VIOMMU: Add irq request callback to deal with irq remapping

[Chao Gao <chao.gao@xxxxxxxxx>]

From: Lan Tianyu <tianyu.lan@xxxxxxxxx>

This patch is to add irq request callback for platform implementation
to deal with irq remapping request.

Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
---
 xen/common/viommu.c          | 15 ++++++++++++
 xen/include/asm-x86/viommu.h | 54 ++++++++++++++++++++++++++++++++++++++++++++
 xen/include/xen/viommu.h     |  6 +++++
 3 files changed, 75 insertions(+)
 create mode 100644 xen/include/asm-x86/viommu.h

diff --git a/xen/common/viommu.c b/xen/common/viommu.c
index fd8b7fd..53d4b70 100644
--- a/xen/common/viommu.c
+++ b/xen/common/viommu.c
@@ -114,6 +114,21 @@ int viommu_domctl(struct domain *d, struct 
xen_domctl_viommu_op *op)
     return rc;
 }
 
+int viommu_handle_irq_request(const struct domain *d,
+                              const struct arch_irq_remapping_request *request)
+{
+    struct viommu *viommu = d->arch.hvm_domain.viommu;
+
+    if ( !viommu )
+        return -ENODEV;
+
+    ASSERT(viommu->ops);
+    if ( !viommu->ops->handle_irq_request )
+        return -EINVAL;
+
+    return viommu->ops->handle_irq_request(d, request);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/asm-x86/viommu.h b/xen/include/asm-x86/viommu.h
new file mode 100644
index 0000000..01ec80e
--- /dev/null
+++ b/xen/include/asm-x86/viommu.h
@@ -0,0 +1,54 @@
+/*
+ * include/asm-x86/viommu.h
+ *
+ * Copyright (c) 2017 Intel Corporation.
+ * Author: Lan Tianyu <tianyu.lan@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef __ARCH_X86_VIOMMU_H__
+#define __ARCH_X86_VIOMMU_H__
+
+/* IRQ request type */
+enum viommu_irq_request_type {
+    VIOMMU_REQUEST_IRQ_MSI = 0,
+    VIOMMU_REQUEST_IRQ_APIC = 1
+};
+
+struct arch_irq_remapping_request
+{
+    union {
+        /* MSI */
+        struct {
+            uint64_t addr;
+            uint32_t data;
+        } msi;
+        /* Redirection Entry in IOAPIC */
+        uint64_t rte;
+    } msg;
+    uint16_t source_id;
+    enum viommu_irq_request_type type;
+};
+
+#endif /* __ARCH_X86_VIOMMU_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/xen/viommu.h b/xen/include/xen/viommu.h
index a859d80..67e25d5 100644
--- a/xen/include/xen/viommu.h
+++ b/xen/include/xen/viommu.h
@@ -22,12 +22,16 @@
 
 #ifdef CONFIG_VIOMMU
 
+#include <asm/viommu.h>
+
 struct viommu;
 
 struct viommu_ops {
     uint8_t type;
     int (*create)(struct domain *d, struct viommu *viommu);
     int (*destroy)(struct viommu *viommu);
+    int (*handle_irq_request)(const struct domain *d,
+                              const struct arch_irq_remapping_request 
*request);
 };
 
 struct viommu {
@@ -44,6 +48,8 @@ struct viommu {
 int viommu_register_type(uint8_t type, struct viommu_ops *ops);
 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);
 #else
 static inline int viommu_destroy_domain(struct domain *d)
 {
-- 
1.8.3.1


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