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    Subject[PATCH v13 00/48] KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush features
    Date
    Changes since v12 (Sean):
    - Reviewed-by: tags added.
    - PATCH13: added a comment explaining why 'hc->ingpa' doesn't need to be
    translated when the hypercall is 'fast'.
    - PATCH34: s,wraping,wrapping, in the blurb.
    - PATCH36: added missing Signed-off-by: tag.
    - "KVM: selftests: Stuff RAX/RCX with 'safe' values in vmmcall()/vmcall()"
    patch added (and used later in the series).
    - "KVM: selftests: Introduce rdmsr_from_l2() and use it for MSR-Bitmap
    tests" patch added (and used later in the series).

    Original description:

    Currently, KVM handles HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} requests
    by flushing the whole VPID and this is sub-optimal. This series introduces
    the required mechanism to make handling of these requests more
    fine-grained by flushing individual GVAs only (when requested). On this
    foundation, "Direct Virtual Flush" Hyper-V feature is implemented. The
    feature allows L0 to handle Hyper-V TLB flush hypercalls directly at
    L0 without the need to reflect the exit to L1. This has at least two
    benefits: reflecting vmexit and the consequent vmenter are avoided + L0
    has precise information whether the target vCPU is actually running (and
    thus requires a kick).

    Sean Christopherson (7):
    x86/hyperv: Move VMCB enlightenment definitions to hyperv-tlfs.h
    KVM: selftests: Move "struct hv_enlightenments" to x86_64/svm.h
    KVM: SVM: Add a proper field for Hyper-V VMCB enlightenments
    x86/hyperv: KVM: Rename "hv_enlightenments" to
    "hv_vmcb_enlightenments"
    KVM: x86: Move clearing of TLB_FLUSH_CURRENT to
    kvm_vcpu_flush_tlb_all()
    KVM: x86: hyper-v: Add helper to read hypercall data for array
    KVM: selftests: Drop helpers to read/write page table entries

    Vitaly Kuznetsov (41):
    KVM: x86: Rename 'enable_direct_tlbflush' to 'enable_l2_tlb_flush'
    KVM: VMX: Rename "vmx/evmcs.{ch}" to "vmx/hyperv.{ch}"
    KVM: x86: hyper-v: Resurrect dedicated KVM_REQ_HV_TLB_FLUSH flag
    KVM: x86: hyper-v: Introduce TLB flush fifo
    KVM: x86: hyper-v: Handle HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} calls
    gently
    KVM: x86: hyper-v: Expose support for extended gva ranges for flush
    hypercalls
    KVM: x86: Prepare kvm_hv_flush_tlb() to handle L2's GPAs
    x86/hyperv: Introduce
    HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK constants
    KVM: x86: hyper-v: Use
    HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK instead of raw
    '64'
    KVM: x86: hyper-v: Don't use sparse_set_to_vcpu_mask() in
    kvm_hv_send_ipi()
    KVM: x86: hyper-v: Create a separate fifo for L2 TLB flush
    KVM: x86: hyper-v: Use preallocated buffer in 'struct kvm_vcpu_hv'
    instead of on-stack 'sparse_banks'
    KVM: nVMX: Keep track of hv_vm_id/hv_vp_id when eVMCS is in use
    KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id
    KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush()
    nested hook
    KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall()
    KVM: x86: hyper-v: L2 TLB flush
    KVM: x86: hyper-v: Introduce fast guest_hv_cpuid_has_l2_tlb_flush()
    check
    KVM: nVMX: hyper-v: Cache VP assist page in 'struct kvm_vcpu_hv'
    KVM: nVMX: hyper-v: Enable L2 TLB flush
    KVM: x86: Make kvm_hv_get_assist_page() return 0/-errno
    KVM: nSVM: hyper-v: Enable L2 TLB flush
    KVM: x86: Expose Hyper-V L2 TLB flush feature
    KVM: selftests: Better XMM read/write helpers
    KVM: selftests: Move HYPERV_LINUX_OS_ID definition to a common header
    KVM: selftests: Move the function doing Hyper-V hypercall to a common
    header
    KVM: selftests: Hyper-V PV IPI selftest
    KVM: selftests: Fill in vm->vpages_mapped bitmap in virt_map() too
    KVM: selftests: Export vm_vaddr_unused_gap() to make it possible to
    request unmapped ranges
    KVM: selftests: Hyper-V PV TLB flush selftest
    KVM: selftests: Sync 'struct hv_enlightened_vmcs' definition with
    hyperv-tlfs.h
    KVM: selftests: Sync 'struct hv_vp_assist_page' definition with
    hyperv-tlfs.h
    KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h
    KVM: selftests: Split off load_evmcs() from load_vmcs()
    KVM: selftests: Create a vendor independent helper to allocate Hyper-V
    specific test pages
    KVM: selftests: Allocate Hyper-V partition assist page
    KVM: selftests: Stuff RAX/RCX with 'safe' values in vmmcall()/vmcall()
    KVM: selftests: Introduce rdmsr_from_l2() and use it for MSR-Bitmap
    tests
    KVM: selftests: evmcs_test: Introduce L2 TLB flush test
    KVM: selftests: hyperv_svm_test: Introduce L2 TLB flush test
    KVM: selftests: Rename 'evmcs_test' to 'hyperv_evmcs'

    arch/x86/include/asm/hyperv-tlfs.h | 37 +
    arch/x86/include/asm/kvm-x86-ops.h | 2 +-
    arch/x86/include/asm/kvm_host.h | 42 +-
    arch/x86/include/asm/svm.h | 7 +-
    arch/x86/kvm/Makefile | 5 +-
    arch/x86/kvm/hyperv.c | 353 +++++++--
    arch/x86/kvm/hyperv.h | 64 +-
    arch/x86/kvm/svm/hyperv.c | 18 +
    arch/x86/kvm/svm/hyperv.h | 50 +-
    arch/x86/kvm/svm/nested.c | 49 +-
    arch/x86/kvm/svm/svm.c | 7 +
    arch/x86/kvm/svm/svm.h | 5 +-
    arch/x86/kvm/svm/svm_onhyperv.c | 8 +-
    arch/x86/kvm/svm/svm_onhyperv.h | 25 +-
    arch/x86/kvm/trace.h | 21 +-
    arch/x86/kvm/vmx/{evmcs.c => hyperv.c} | 45 +-
    arch/x86/kvm/vmx/{evmcs.h => hyperv.h} | 12 +-
    arch/x86/kvm/vmx/nested.c | 43 +-
    arch/x86/kvm/vmx/vmx.c | 7 +-
    arch/x86/kvm/vmx/vmx_ops.h | 2 +-
    arch/x86/kvm/x86.c | 36 +-
    include/asm-generic/hyperv-tlfs.h | 5 +
    include/asm-generic/mshyperv.h | 11 +-
    tools/testing/selftests/kvm/.gitignore | 4 +-
    tools/testing/selftests/kvm/Makefile | 5 +-
    .../selftests/kvm/include/kvm_util_base.h | 1 +
    .../selftests/kvm/include/x86_64/evmcs.h | 48 +-
    .../selftests/kvm/include/x86_64/hyperv.h | 102 +++
    .../selftests/kvm/include/x86_64/processor.h | 90 +--
    .../selftests/kvm/include/x86_64/svm.h | 26 +-
    .../selftests/kvm/include/x86_64/svm_util.h | 14 +
    .../selftests/kvm/include/x86_64/vmx.h | 23 +-
    tools/testing/selftests/kvm/lib/kvm_util.c | 9 +-
    .../testing/selftests/kvm/lib/x86_64/hyperv.c | 46 ++
    .../selftests/kvm/lib/x86_64/processor.c | 21 +-
    tools/testing/selftests/kvm/lib/x86_64/vmx.c | 45 +-
    .../kvm/x86_64/emulator_error_test.c | 6 +-
    .../x86_64/{evmcs_test.c => hyperv_evmcs.c} | 93 ++-
    .../selftests/kvm/x86_64/hyperv_features.c | 25 +-
    .../testing/selftests/kvm/x86_64/hyperv_ipi.c | 314 ++++++++
    .../selftests/kvm/x86_64/hyperv_svm_test.c | 92 ++-
    .../selftests/kvm/x86_64/hyperv_tlb_flush.c | 690 ++++++++++++++++++
    42 files changed, 2118 insertions(+), 390 deletions(-)
    create mode 100644 arch/x86/kvm/svm/hyperv.c
    rename arch/x86/kvm/vmx/{evmcs.c => hyperv.c} (95%)
    rename arch/x86/kvm/vmx/{evmcs.h => hyperv.h} (95%)
    create mode 100644 tools/testing/selftests/kvm/lib/x86_64/hyperv.c
    rename tools/testing/selftests/kvm/x86_64/{evmcs_test.c => hyperv_evmcs.c} (69%)
    create mode 100644 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c
    create mode 100644 tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c

    --
    2.37.3

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