78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2025 Advanced Micro Devices, Inc.
|
|
*/
|
|
|
|
#include <linux/iommu.h>
|
|
|
|
#include "iommufd.h"
|
|
#include "amd_iommu.h"
|
|
#include "amd_iommu_types.h"
|
|
|
|
static const struct iommufd_viommu_ops amd_viommu_ops;
|
|
|
|
void *amd_iommufd_hw_info(struct device *dev, u32 *length, enum iommu_hw_info_type *type)
|
|
{
|
|
struct iommu_hw_info_amd *hwinfo;
|
|
|
|
if (*type != IOMMU_HW_INFO_TYPE_DEFAULT &&
|
|
*type != IOMMU_HW_INFO_TYPE_AMD)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
hwinfo = kzalloc_obj(*hwinfo);
|
|
if (!hwinfo)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
*length = sizeof(*hwinfo);
|
|
*type = IOMMU_HW_INFO_TYPE_AMD;
|
|
|
|
hwinfo->efr = amd_iommu_efr;
|
|
hwinfo->efr2 = amd_iommu_efr2;
|
|
|
|
return hwinfo;
|
|
}
|
|
|
|
size_t amd_iommufd_get_viommu_size(struct device *dev, enum iommu_viommu_type viommu_type)
|
|
{
|
|
return VIOMMU_STRUCT_SIZE(struct amd_iommu_viommu, core);
|
|
}
|
|
|
|
int amd_iommufd_viommu_init(struct iommufd_viommu *viommu, struct iommu_domain *parent,
|
|
const struct iommu_user_data *user_data)
|
|
{
|
|
unsigned long flags;
|
|
struct protection_domain *pdom = to_pdomain(parent);
|
|
struct amd_iommu_viommu *aviommu = container_of(viommu, struct amd_iommu_viommu, core);
|
|
|
|
xa_init_flags(&aviommu->gdomid_array, XA_FLAGS_ALLOC1);
|
|
aviommu->parent = pdom;
|
|
|
|
viommu->ops = &amd_viommu_ops;
|
|
|
|
spin_lock_irqsave(&pdom->lock, flags);
|
|
list_add(&aviommu->pdom_list, &pdom->viommu_list);
|
|
spin_unlock_irqrestore(&pdom->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void amd_iommufd_viommu_destroy(struct iommufd_viommu *viommu)
|
|
{
|
|
unsigned long flags;
|
|
struct amd_iommu_viommu *aviommu = container_of(viommu, struct amd_iommu_viommu, core);
|
|
struct protection_domain *pdom = aviommu->parent;
|
|
|
|
spin_lock_irqsave(&pdom->lock, flags);
|
|
list_del(&aviommu->pdom_list);
|
|
spin_unlock_irqrestore(&pdom->lock, flags);
|
|
xa_destroy(&aviommu->gdomid_array);
|
|
}
|
|
|
|
/*
|
|
* See include/linux/iommufd.h
|
|
* struct iommufd_viommu_ops - vIOMMU specific operations
|
|
*/
|
|
static const struct iommufd_viommu_ops amd_viommu_ops = {
|
|
.destroy = amd_iommufd_viommu_destroy,
|
|
};
|