Merge tag 'x86_tdx_for_6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Merge tag 'x86_tdx_for_6.7' of git://git./linux/kernel/git/tip/tip

Pull x86 TDX updates from Dave Hansen:
 "The majority of this is a rework of the assembly and C wrappers that
  are used to talk to the TDX module and VMM. This is a nice cleanup in
  general but is also clearing the way for using this code when Linux is
  the TDX VMM.

  There are also some tidbits to make TDX guests play nicer with Hyper-V
  and to take advantage the hardware TSC.

  Summary:

   - Refactor and clean up TDX hypercall/module call infrastructure

   - Handle retrying/resuming page conversion hypercalls

   - Make sure to use the (shockingly) reliable TSC in TDX guests"

[ TLA reminder: TDX is "Trust Domain Extensions", Intel's guest VM
  confidentiality technology ]

* tag 'x86_tdx_for_6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tdx: Mark TSC reliable
  x86/tdx: Fix __noreturn build warning around __tdx_hypercall_failed()
  x86/virt/tdx: Make TDX_MODULE_CALL handle SEAMCALL #UD and #GP
  x86/virt/tdx: Wire up basic SEAMCALL functions
  x86/tdx: Remove 'struct tdx_hypercall_args'
  x86/tdx: Reimplement __tdx_hypercall() using TDX_MODULE_CALL asm
  x86/tdx: Make TDX_HYPERCALL asm similar to TDX_MODULE_CALL
  x86/tdx: Extend TDX_MODULE_CALL to support more TDCALL/SEAMCALL leafs
  x86/tdx: Pass TDCALL/SEAMCALL input/output registers via a structure
  x86/tdx: Rename __tdx_module_call() to __tdcall()
  x86/tdx: Make macros of TDCALLs consistent with the spec
  x86/tdx: Skip saving output regs when SEAMCALL fails with VMFailInvalid
  x86/tdx: Zero out the missing RSI in TDX_HYPERCALL macro
  x86/tdx: Retry partially-completed page conversion hypercalls