treewide: refresh kmalloc_obj() conversionsgrafted

This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/drivers/iommu/amd/iommufd.c b/drivers/iommu/amd/iommufd.c
new file mode 100644
index 000000000..52300b867
--- /dev/null
+++ b/drivers/iommu/amd/iommufd.c
@@ -0,0 +1,77 @@
+// 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,
+};