OvmfPkg: Introduce IntelTdxX64 for TDVF Config-B

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Intel's Trust Domain Extensions (Intel TDX) refers to an Intel technology
that extends Virtual Machines Extensions (VMX) and Multi-Key Total Memory
Encryption (MKTME) with a new kind of virutal machines guest called a
Trust Domain (TD). A TD is desinged to run in a CPU mode that protects the
confidentiality of TD memory contents and the TD's CPU state from other
software, including the hosting Virtual-Machine Monitor (VMM), unless
explicitly shared by the TD itself.

There are 2 configurations for TDVF to upstream. See below link for
the definitions of the 2 configurations.
https://edk2.groups.io/g/devel/message/76367

This patch-set is to enable the basic feature of Config-B in OvmfPkg.
 - Add a standalone IntelTdxX64.dsc to a TDX specific directory for a
   *full* feature TDVF. (Align with existing SEV)
 - IntelTdx.dsc includes Tdx/Legacy OVMF basic boot capability. The
   final binary can run on Tdx/Legacy OVMF.
 - PEI phase is skipped.

By design in Config-B there should be more advanced features, such as:
 - RTMR based measurement and measure boot.
 - Remove unnecessary drivers to reduce attack surface, such as
   network stack.

To make the code review more efficiency, Config-B is split into 2 waves:
 - Basic feature of Config-B
 - Advanced feature of Config-B

This patch contains 2 files (IntelTdxX64.dsc/IntelTdxX64.fdf) which
enable the basic feature of Config-B. In the waves of Advanced feature
of Config-B, we will re-visit these 2 files.

TDX_PEI_LESS_BOOT is defined in IntelTdxX64.dsc to indicate it boots up
without PEI phase.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>

0 files changed, 0 insertions, 0 deletions