[GIT PULL] KVM: x86: Hyper-V changes for 6.8

[Sean Christopherson]

This is essentially Vitaly's series to add CONFIG_KVM_HYPERV, along with a
one-off patch to clean up the range-based TLB flush APIs.  While it's not super
obvious that adding CONFIG_KVM_HYPERV is worth the churn, e.g. very few setups
can actually disable CONFIG_KVM_HYPERV in practice, the end result is nice and
at the very least makes it easier for non-HyperV gurus to follow along.

The following changes since commit e9e60c82fe391d04db55a91c733df4a017c28b2f:

  selftests/kvm: fix compilation on non-x86_64 platforms (2023-11-21 11:58:25 -0500)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-hyperv-6.8

for you to fetch changes up to 017a99a966f1183e611f0b0fa6bec40160c81813:

  KVM: nSVM: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV (2023-12-07 09:35:26 -0800)

----------------------------------------------------------------
KVM x86 Hyper-V changes for 6.8:

 - Guard KVM-on-HyperV's range-based TLB flush hooks with an #ifdef on
   CONFIG_HYPERV as a minor optimization, and to self-document the code.

 - Add CONFIG_KVM_HYPERV to allow disabling KVM support for HyperV "emulation"
   at build time.

----------------------------------------------------------------
Sean Christopherson (1):
      KVM: x86/mmu: Declare flush_remote_tlbs{_range}() hooks iff HYPERV!=n

Vitaly Kuznetsov (16):
      KVM: x86/xen: Remove unneeded xen context from kvm_arch when !CONFIG_KVM_XEN
      KVM: x86: Move Hyper-V partition assist page out of Hyper-V emulation context
      KVM: VMX: Split off vmx_onhyperv.{ch} from hyperv.{ch}
      KVM: x86: Introduce helper to check if auto-EOI is set in Hyper-V SynIC
      KVM: x86: Introduce helper to check if vector is set in Hyper-V SynIC
      KVM: VMX: Split off hyperv_evmcs.{ch}
      KVM: x86: Introduce helper to handle Hyper-V paravirt TLB flush requests
      KVM: nVMX: Split off helper for emulating VMCLEAR on Hyper-V eVMCS
      KVM: selftests: Make Hyper-V tests explicitly require KVM Hyper-V support
      KVM: selftests: Fix vmxon_pa == vmcs12_pa == -1ull nVMX testcase for !eVMCS
      KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h
      KVM: x86: Make Hyper-V emulation optional
      KVM: nVMX: Introduce helpers to check if Hyper-V evmptr12 is valid/set
      KVM: nVMX: Introduce accessor to get Hyper-V eVMCS pointer
      KVM: nVMX: Hide more stuff under CONFIG_KVM_HYPERV
      KVM: nSVM: Hide more stuff under CONFIG_KVM_HYPERV/CONFIG_HYPERV

 arch/x86/include/asm/kvm-x86-ops.h                 |   2 +
 arch/x86/include/asm/kvm_host.h                    |  25 +-
 arch/x86/kvm/Kconfig                               |  14 +
 arch/x86/kvm/Makefile                              |  16 +-
 arch/x86/kvm/cpuid.c                               |   6 +
 arch/x86/kvm/hyperv.h                              |  85 +++-
 arch/x86/kvm/irq.c                                 |   2 +
 arch/x86/kvm/irq_comm.c                            |   9 +-
 arch/x86/kvm/kvm_onhyperv.h                        |  20 +
 arch/x86/kvm/lapic.c                               |   5 +-
 arch/x86/kvm/mmu/mmu.c                             |  12 +-
 arch/x86/kvm/svm/hyperv.h                          |   9 +
 arch/x86/kvm/svm/nested.c                          |  30 +-
 arch/x86/kvm/svm/svm.h                             |   2 +
 arch/x86/kvm/svm/svm_onhyperv.c                    |  10 +-
 arch/x86/kvm/vmx/hyperv.c                          | 447 ---------------------
 arch/x86/kvm/vmx/hyperv.h                          | 238 +++--------
 arch/x86/kvm/vmx/hyperv_evmcs.c                    | 315 +++++++++++++++
 arch/x86/kvm/vmx/hyperv_evmcs.h                    | 166 ++++++++
 arch/x86/kvm/vmx/nested.c                          | 149 ++++---
 arch/x86/kvm/vmx/nested.h                          |   3 +-
 arch/x86/kvm/vmx/vmx.c                             |  20 +-
 arch/x86/kvm/vmx/vmx.h                             |  12 +-
 arch/x86/kvm/vmx/vmx_onhyperv.c                    |  36 ++
 arch/x86/kvm/vmx/vmx_onhyperv.h                    | 125 ++++++
 arch/x86/kvm/vmx/vmx_ops.h                         |   2 +-
 arch/x86/kvm/x86.c                                 |  66 ++-
 tools/testing/selftests/kvm/x86_64/hyperv_clock.c  |   2 +
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c  |   5 +-
 .../kvm/x86_64/hyperv_extended_hypercalls.c        |   2 +
 .../testing/selftests/kvm/x86_64/hyperv_features.c |   2 +
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c    |   2 +
 .../testing/selftests/kvm/x86_64/hyperv_svm_test.c |   1 +
 .../selftests/kvm/x86_64/hyperv_tlb_flush.c        |   2 +
 .../kvm/x86_64/vmx_set_nested_state_test.c         |  16 +-
 35 files changed, 1091 insertions(+), 767 deletions(-)
 create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.c
 create mode 100644 arch/x86/kvm/vmx/hyperv_evmcs.h
 create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.c
 create mode 100644 arch/x86/kvm/vmx/vmx_onhyperv.h