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[0/4] x86/tdx: Changes for TDX guest initialization

Message ID 20221209132524.20200-1-kirill.shutemov@linux.intel.com
Headers
Series x86/tdx: Changes for TDX guest initialization |

Message

Kirill A. Shutemov Dec. 9, 2022, 1:25 p.m. UTC 
  Several changes to TDX initialization:

- Make early panic message visible to user;

- Relax SEPT_VE_DISABLE for debug TD. It helps to investigate bugs
  resulting in access of unaccepted memory.

- Make sure NOTIFY_ENABLES is off to eliminate possible source of random
  #VE.

The patchset makes use of ReportFatalError TDVMCALL. The definition of
the TDVMCALL has changed in recent GHCI update[1]. It now requires more
arguments handled by __tdx_hypercall(). The patch that expands
__tdx_hypercall() is the same as the patch included in TDX guest
enabling for Hyper-V.

[1] https://cdrdv2.intel.com/v1/dl/getContent/726790

Kirill A. Shutemov (4):
  x86/tdx: Expand __tdx_hypercall() to handle more arguments
  x86/tdx: Use ReportFatalError to report missing SEPT_VE_DISABLE
  x86/tdx: Relax SEPT_VE_DISABLE check for debug TD
  x86/tdx: Disable NOTIFY_ENABLES

 arch/x86/coco/tdx/tdcall.S        | 82 ++++++++++++++++++++++---------
 arch/x86/coco/tdx/tdx.c           | 57 ++++++++++++++++++++-
 arch/x86/include/asm/shared/tdx.h |  6 +++
 arch/x86/kernel/asm-offsets.c     |  6 +++
 4 files changed, 125 insertions(+), 26 deletions(-)