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
