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To support TDX attestation, the TDX guest driver exposes an IOCTL interface to allow userspace to get the TDREPORT0 (a.k.a. TDREPORT subtype 0) from the TDX module via TDG.MR.TDREPORT TDCALL. In order to get the TDREPORT0 in the TDX guest driver, instead of using a low level function like __tdx_module_call(), add a tdx_mcall_get_report0() wrapper function to handle it. This is a preparatory patch for adding attestation support. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Wander Lairson Costa <wander@redhat.com> Link: https://lore.kernel.org/all/20221116223820.819090-2-sathyanarayanan.kuppuswamy%40linux.intel.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.