select SWIOTLB
select ARCH_HAS_MEM_ENCRYPT
select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select ARCH_HAS_CC_PLATFORM
help
There are certain POWER platforms which support secure guests using
the Protected Execution Facility, with the help of an Ultravisor
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Confidential Computing Platform Capability checks
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ */
+
+#include <linux/export.h>
+#include <linux/cc_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/svm.h>
+
+bool cc_platform_has(enum cc_attr attr)
+{
+ switch (attr) {
+ case CC_ATTR_MEM_ENCRYPT:
+ return is_secure_guest();
+
+ default:
+ return false;
+ }
+}
+EXPORT_SYMBOL_GPL(cc_platform_has);