[RFC v2-fix-v1 0/3] x86/tdx: Handle port I/O

[Kuppuswamy Sathyanarayanan]

This patchset addresses the review comments in the patch titled
"[RFC v2 14/32] x86/tdx: Handle port I/O". Since it requires
patch split, sending these together.

Changes since RFC v2:
 * Removed assembly implementation of port IO emulation code
   and modified __in/__out IO helpers to directly call C function
   for in/out instruction emulation in decompression code.
 * Added helper function tdx_get_iosize() to make it easier for
   calling tdg_out/tdg_int() C functions from decompression code.
 * Added support for early exception handler to support IO
   instruction emulation in early boot kernel code.
 * Removed alternative_ usage and made kernel only use #VE based
   IO instruction emulation support outside the decompression module.
 * Added support for protection_guest_has() API to generalize
   AMD SEV/TDX specific initialization code in common drivers.
 * Fixed commit log and comments as per review comments.


Andi Kleen (1):
  x86/tdx: Handle early IO operations

Kirill A. Shutemov (1):
  x86/tdx: Handle port I/O

Kuppuswamy Sathyanarayanan (1):
  tdx: Introduce generic protected_guest abstraction

 arch/Kconfig                           |   3 +
 arch/x86/Kconfig                       |   1 +
 arch/x86/boot/compressed/Makefile      |   1 +
 arch/x86/boot/compressed/tdcall.S      |   3 +
 arch/x86/boot/compressed/tdx.c         |  28 ++++++
 arch/x86/include/asm/io.h              |   7 +-
 arch/x86/include/asm/protected_guest.h |  24 +++++
 arch/x86/include/asm/tdx.h             |  60 ++++++++++++-
 arch/x86/kernel/head64.c               |   4 +
 arch/x86/kernel/tdx.c                  | 116 +++++++++++++++++++++++++
 include/linux/protected_guest.h        |  23 +++++
 11 files changed, 267 insertions(+), 3 deletions(-)
 create mode 100644 arch/x86/boot/compressed/tdcall.S
 create mode 100644 arch/x86/include/asm/protected_guest.h
 create mode 100644 include/linux/protected_guest.h

-- 
2.25.1