Re: [PATCH v3 2/8] mm: Introduce a function to check for confidential computing features

On Wed, Sep 08, 2021 at 05:58:33PM -0500, Tom Lendacky wrote:

In prep for other confidential computing technologies, introduce a generic

preparation

helper function, cc_platform_has(), that can be used to check for specific active confidential computing attributes, like memory encryption. This is intended to eliminate having to add multiple technology-specific checks to the code (e.g. if (sev_active() || tdx_active())).

...

diff --git a/include/linux/cc_platform.h b/include/linux/cc_platform.h new file mode 100644 index 000000000000..253f3ea66cd8 --- /dev/null +++ b/include/linux/cc_platform.h @@ -0,0 +1,88 @@ +/* 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
• */

+#ifndef _CC_PLATFORM_H

_LINUX_CC_PLATFORM_H

+#define _CC_PLATFORM_H