qemu/vfio-iommufd-Implement-at-de-tach_hwpt-handlers.patch

From aea706f6a71ddbcc9bd342ece14991f8f8261224 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Thu, 11 Jan 2024 17:26:50 +0800
Subject: [PATCH] vfio/iommufd: Implement [at|de]tach_hwpt handlers

Implement [at|de]tach_hwpt handlers in VFIO subsystem. vIOMMU
utilizes them to attach to or detach from hwpt on host side.

To achieve that, a new property vdev is add to
TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO which is initialized in
.realize() handler.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
[Shameer: Changed ret for host_iommu_device_iommufd_vfio_detach_hwpt()]
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 hw/vfio/iommufd.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 47a8823146..528023b95b 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -827,6 +827,24 @@ static void vfio_iommu_iommufd_class_init(ObjectClass *klass, void *data)
     vioc->query_dirty_bitmap = iommufd_query_dirty_bitmap;
 };
 
+static bool
+host_iommu_device_iommufd_vfio_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
+                                           uint32_t hwpt_id, Error **errp)
+{
+    VFIODevice *vbasedev = HOST_IOMMU_DEVICE(idev)->agent;
+
+    return !iommufd_cdev_attach_ioas_hwpt(vbasedev, hwpt_id, errp);
+}
+
+static bool
+host_iommu_device_iommufd_vfio_detach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
+                                           Error **errp)
+{
+    VFIODevice *vbasedev = HOST_IOMMU_DEVICE(idev)->agent;
+
+    return !iommufd_cdev_detach_ioas_hwpt(vbasedev, errp);
+}
+
 static bool hiod_iommufd_vfio_realize_late(HostIOMMUDevice *hiod, void *opaque,
                                            Error **errp)
 {
@@ -872,9 +890,13 @@ static bool hiod_iommufd_vfio_realize(HostIOMMUDevice *hiod, void *opaque,
 static void hiod_iommufd_vfio_class_init(ObjectClass *oc, void *data)
 {
     HostIOMMUDeviceClass *hiodc = HOST_IOMMU_DEVICE_CLASS(oc);
+    HostIOMMUDeviceIOMMUFDClass *idevc = HOST_IOMMU_DEVICE_IOMMUFD_CLASS(oc);
 
     hiodc->realize = hiod_iommufd_vfio_realize;
     hiodc->realize_late = hiod_iommufd_vfio_realize_late;
+
+    idevc->attach_hwpt = host_iommu_device_iommufd_vfio_attach_hwpt;
+    idevc->detach_hwpt = host_iommu_device_iommufd_vfio_detach_hwpt;
 };
 
 static const TypeInfo types[] = {
-- 
2.41.0.windows.1