[PATCHv3 0/4] x86/tdx: Adjust TD settings on boot

[Kirill A. Shutemov]

The patchset adjusts a few TD settings on boot for the optimal functioning
of the system:

  - Disable EPT violation #VE on private memory if TD can control it

    The newer TDX module allows the guest to control whether it wants to
    see #VE on EPT violation on private memory. The Linux kernel does not
    want such #VEs and needs to disable them.

  - Enable virtualization of topology-related CPUID leafs X2APIC_APICID MSR;

    The ENUM_TOPOLOGY feature allows the VMM to provide topology
    information to the guest. Enabling the feature eliminates
    topology-related #VEs: the TDX module virtualizes accesses to the
    CPUID leafs and the MSR.

    It allows TDX guest to run with non-trivial topology configuration.

v3:
  - Update commit messages;
  - Rework patches 3/4 and 4/4;
v2:
  - Rebased;
  - Allow write to TDCS_TD_CTLS to fail;
  - Adjust commit messages;

Kirill A. Shutemov (4):
  x86/tdx: Factor out TD metadata write TDCALL
  x86/tdx: Rename tdx_parse_tdinfo() to tdx_setup()
  x86/tdx: Handle PENDING_EPT_VIOLATION_V2
  x86/tdx: Enable ENUM_TOPOLOGY

 arch/x86/coco/tdx/tdx.c           | 163 +++++++++++++++++++++++++++---
 arch/x86/include/asm/shared/tdx.h |  21 +++-
 2 files changed, 169 insertions(+), 15 deletions(-)

-- 
2.43.0