[GIT PULL] KVM: x86: VMX changes for 6.18

[Sean Christopherson <seanjc@google.com>]

Fix a TDX bug detected by Smatch where KVM would return '0' on failure, do a
bit of early prep for FRED virtualization, and tidy up.

The following changes since commit c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9:

  Linux 6.17-rc2 (2025-08-17 15:22:10 -0700)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-vmx-6.18

for you to fetch changes up to 510c47f165f0c1f0b57329a30a9a797795519831:

  KVM: TDX: Fix uninitialized error code for __tdx_bringup() (2025-09-19 15:25:34 -0700)

----------------------------------------------------------------
KVM VMX changes for 6.18

 - Add read/write helpers for MSRs that need to be accessed with preemption
   disable to prepare for virtualizing FRED RSP0.

 - Fix a bug where KVM would return 0/success from __tdx_bringup() on error,
   i.e. where KVM would load with enable_tdx=true despite TDX not being usable.

 - Minor cleanups.

----------------------------------------------------------------
Qianfeng Rong (1):
      KVM: TDX: Remove redundant __GFP_ZERO

Sean Christopherson (1):
      KVM: VMX: Add host MSR read/write helpers to consolidate preemption handling

Tony Lindgren (1):
      KVM: TDX: Fix uninitialized error code for __tdx_bringup()

Xin Li (1):
      KVM: VMX: Fix an indentation

 arch/x86/kvm/vmx/tdx.c | 12 ++++--------
 arch/x86/kvm/vmx/vmx.c | 37 ++++++++++++++++++++++++++-----------
 2 files changed, 30 insertions(+), 19 deletions(-)