x86/virt/tdx: Retrieve TDX module version

Each TDX module has several bits of metadata about which specific TDX
module it is. The primary bit of info is the version, which has an x.y.z
format. These represent the major version, minor version, and update
version respectively. Knowing the running TDX Module version is valuable
for bug reporting and debugging. Note that the module does expose other
pieces of version-related metadata, such as build number and date. Those
aren't retrieved for now, that can be added if needed in the future.

Retrieve the TDX Module version using the existing metadata reading
interface. Later changes will expose this information. The metadata
reading interfaces have existed for quite some time, so this will work
with older versions of the TDX module as well - i.e. this isn't a new
interface.

As a side note, the global metadata reading code was originally set up
to be auto-generated from a JSON definition [1]. However, later [2] this
was found to be unsustainable, and the autogeneration approach was
dropped in favor of just manually adding fields as needed (e.g. as in
this patch).

Signed-off-by: Chao Gao <chao.gao@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kiryl Shutsemau <kas@kernel.org>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/kvm/CABgObfYXUxqQV_FoxKjC8U3t5DnyM45nz5DpTxYZv2x_uFK_Kw@mail.gmail.com/ # [1]
Link: https://lore.kernel.org/all/1e7bcbad-eb26-44b7-97ca-88ab53467212@intel.com/ # [2]
Link: https://patch.msgid.link/20260109-tdx_print_module_version-v2-1-e10e4ca5b450@intel.com

0 files changed, 0 insertions, 0 deletions