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

Kirill A. Shutemov
2022-12-09T13:25:52Z

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(-)

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2.38.0