qemu/backends-iommufd-Implement-HostIOMMUDeviceClass-get_.patch

From 2f1a2f4b320e70a85cef8392cd5f4b1e54afb9c9 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Wed, 5 Jun 2024 16:30:36 +0800
Subject: [PATCH] backends/iommufd: Implement HostIOMMUDeviceClass::get_cap()
 handler
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Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
---
 backends/iommufd.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/backends/iommufd.c b/backends/iommufd.c
index 604a8f4e7d..7e805bd664 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -245,6 +245,28 @@ bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
     return true;
 }
 
+static int hiod_iommufd_get_cap(HostIOMMUDevice *hiod, int cap, Error **errp)
+{
+    HostIOMMUDeviceCaps *caps = &hiod->caps;
+
+    switch (cap) {
+    case HOST_IOMMU_DEVICE_CAP_IOMMU_TYPE:
+        return caps->type;
+    case HOST_IOMMU_DEVICE_CAP_AW_BITS:
+        return caps->aw_bits;
+    default:
+        error_setg(errp, "%s: unsupported capability %x", hiod->name, cap);
+        return -EINVAL;
+    }
+}
+
+static void hiod_iommufd_class_init(ObjectClass *oc, void *data)
+{
+    HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc);
+
+    hioc->get_cap = hiod_iommufd_get_cap;
+};
+
 static const TypeInfo types[] = {
     {
         .name = TYPE_IOMMUFD_BACKEND,
@@ -261,6 +283,7 @@ static const TypeInfo types[] = {
     }, {
         .name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
         .parent = TYPE_HOST_IOMMU_DEVICE,
+        .class_init = hiod_iommufd_class_init,
         .abstract = true,
     }
 };
-- 
2.41.0.windows.1