[PATCH v11 00/81] VM introspection

["Adalbert Lazăr" <alazar@bitdefender.com>]

There are no major changes from the previous version (v10), except on
patch 49, to avoid a possible case of stack corruption.

Changes since v10 (https://lore.kernel.org/kvm/20201125093600.2766-1-alazar@bitdefender.com/):
  - fix the event reply validation
  - fix the compile-time warnings reported by "kernel test robot <lkp@intel.com>"
  - send the error code (KVM_ENOMEM) when the memory allocation fails
    while handling the KVMI_VCPU_GET_XSAVE command

Adalbert Lazăr (24):
  KVM: UAPI: add error codes used by the VM introspection code
  KVM: add kvm_vcpu_kick_and_wait()
  KVM: doc: fix the hypercalls numbering
  KVM: x86: add kvm_x86_ops.control_cr3_intercept()
  KVM: x86: add kvm_x86_ops.desc_ctrl_supported()
  KVM: x86: add kvm_x86_ops.control_desc_intercept()
  KVM: x86: export kvm_vcpu_ioctl_x86_set_xsave()
  KVM: introspection: add hook/unhook ioctls
  KVM: introspection: add permission access ioctls
  KVM: introspection: add the read/dispatch message function
  KVM: introspection: add KVMI_GET_VERSION
  KVM: introspection: add KVMI_VM_CHECK_COMMAND and KVMI_VM_CHECK_EVENT
  KVM: introspection: add KVM_INTROSPECTION_PREUNHOOK
  KVM: introspection: add KVMI_VM_EVENT_UNHOOK
  KVM: introspection: add KVMI_VM_CONTROL_EVENTS
  KVM: introspection: add a jobs list to every introspected vCPU
  KVM: introspection: add KVMI_VM_PAUSE_VCPU
  KVM: introspection: add support for vCPU events
  KVM: introspection: add KVMI_VCPU_EVENT_PAUSE
  KVM: introspection: add KVMI_VM_CONTROL_CLEANUP
  KVM: introspection: add KVMI_VCPU_GET_XCR
  KVM: introspection: add KVMI_VCPU_SET_XSAVE
  KVM: introspection: extend KVMI_GET_VERSION with struct kvmi_features
  KVM: introspection: add KVMI_VCPU_TRANSLATE_GVA

Marian Rotariu (1):
  KVM: introspection: add KVMI_VCPU_GET_CPUID

Mihai Donțu (33):
  KVM: x86: add kvm_arch_vcpu_get_regs() and kvm_arch_vcpu_get_sregs()
  KVM: x86: avoid injecting #PF when emulate the VMCALL instruction
  KVM: x86: add kvm_x86_ops.control_msr_intercept()
  KVM: x86: vmx: use a symbolic constant when checking the exit
    qualifications
  KVM: x86: save the error code during EPT/NPF exits handling
  KVM: x86: add kvm_x86_ops.fault_gla()
  KVM: x86: extend kvm_mmu_gva_to_gpa_system() with the 'access'
    parameter
  KVM: x86: page track: provide all callbacks with the guest virtual
    address
  KVM: x86: page track: add track_create_slot() callback
  KVM: x86: page_track: add support for preread, prewrite and preexec
  KVM: x86: wire in the preread/prewrite/preexec page trackers
  KVM: introduce VM introspection
  KVM: introspection: add KVMI_VM_GET_INFO
  KVM: introspection: add KVMI_VM_READ_PHYSICAL/KVMI_VM_WRITE_PHYSICAL
  KVM: introspection: handle vCPU introspection requests
  KVM: introspection: handle vCPU commands
  KVM: introspection: add KVMI_VCPU_GET_INFO
  KVM: introspection: add the crash action handling on the event reply
  KVM: introspection: add KVMI_VCPU_CONTROL_EVENTS
  KVM: introspection: add KVMI_VCPU_GET_REGISTERS
  KVM: introspection: add KVMI_VCPU_SET_REGISTERS
  KVM: introspection: add KVMI_VCPU_EVENT_HYPERCALL
  KVM: introspection: add KVMI_VCPU_EVENT_BREAKPOINT
  KVM: introspection: add KVMI_VCPU_CONTROL_CR and KVMI_VCPU_EVENT_CR
  KVM: introspection: add KVMI_VCPU_INJECT_EXCEPTION +
    KVMI_VCPU_EVENT_TRAP
  KVM: introspection: add KVMI_VCPU_EVENT_XSETBV
  KVM: introspection: add KVMI_VCPU_GET_XSAVE
  KVM: introspection: add KVMI_VCPU_GET_MTRR_TYPE
  KVM: introspection: add KVMI_VCPU_CONTROL_MSR and KVMI_VCPU_EVENT_MSR
  KVM: introspection: add KVMI_VM_SET_PAGE_ACCESS
  KVM: introspection: add KVMI_VCPU_EVENT_PF
  KVM: introspection: emulate a guest page table walk on SPT violations
    due to A/D bit updates
  KVM: x86: call the page tracking code on emulation failure

Mircea Cîrjaliu (2):
  KVM: x86: disable gpa_available optimization for fetch and page-walk
    SPT violations
  KVM: introspection: add vCPU related data

Nicușor Cîțu (19):
  KVM: x86: add kvm_arch_vcpu_set_regs()
  KVM: x86: add kvm_x86_ops.bp_intercepted()
  KVM: x86: add kvm_x86_ops.cr3_write_intercepted()
  KVM: svm: add support for descriptor-table VM-exits
  KVM: x86: add kvm_x86_ops.desc_intercepted()
  KVM: x86: add kvm_x86_ops.msr_write_intercepted()
  KVM: x86: svm: use the vmx convention to control the MSR interception
  KVM: x86: add kvm_x86_ops.control_singlestep()
  KVM: x86: export kvm_arch_vcpu_set_guest_debug()
  KVM: x86: export kvm_inject_pending_exception()
  KVM: x86: export kvm_vcpu_ioctl_x86_get_xsave()
  KVM: introspection: add cleanup support for vCPUs
  KVM: introspection: restore the state of #BP interception on unhook
  KVM: introspection: restore the state of CR3 interception on unhook
  KVM: introspection: add KVMI_VCPU_EVENT_DESCRIPTOR
  KVM: introspection: restore the state of descriptor-table register
    interception on unhook
  KVM: introspection: restore the state of MSR interception on unhook
  KVM: introspection: add KVMI_VCPU_CONTROL_SINGLESTEP
  KVM: introspection: add KVMI_VCPU_EVENT_SINGLESTEP

Ștefan Șicleru (2):
  KVM: add kvm_get_max_gfn()
  KVM: introspection: add KVMI_VM_GET_MAX_GFN

 Documentation/virt/kvm/api.rst                |  159 ++
 Documentation/virt/kvm/hypercalls.rst         |   39 +-
 Documentation/virt/kvm/kvmi.rst               | 1573 +++++++++++++
 arch/x86/include/asm/kvm_host.h               |   46 +-
 arch/x86/include/asm/kvm_page_track.h         |   71 +-
 arch/x86/include/asm/kvmi_host.h              |  110 +
 arch/x86/include/asm/vmx.h                    |    2 +
 arch/x86/include/uapi/asm/kvmi.h              |  167 ++
 arch/x86/kvm/Kconfig                          |    9 +
 arch/x86/kvm/Makefile                         |    2 +
 arch/x86/kvm/emulate.c                        |    4 +
 arch/x86/kvm/kvm_emulate.h                    |    1 +
 arch/x86/kvm/kvmi.c                           | 1131 ++++++++++
 arch/x86/kvm/kvmi.h                           |   24 +
 arch/x86/kvm/kvmi_msg.c                       |  456 ++++
 arch/x86/kvm/mmu/mmu.c                        |  140 +-
 arch/x86/kvm/mmu/mmu_internal.h               |    4 +
 arch/x86/kvm/mmu/page_track.c                 |  146 +-
 arch/x86/kvm/mmu/spte.c                       |   17 +
 arch/x86/kvm/svm/svm.c                        |  288 ++-
 arch/x86/kvm/svm/svm.h                        |    7 +
 arch/x86/kvm/vmx/capabilities.h               |    7 +-
 arch/x86/kvm/vmx/vmx.c                        |  168 +-
 arch/x86/kvm/vmx/vmx.h                        |    4 -
 arch/x86/kvm/x86.c                            |  302 ++-
 drivers/gpu/drm/i915/gvt/kvmgt.c              |    2 +-
 include/linux/kvm_host.h                      |   16 +
 include/linux/kvmi_host.h                     |  110 +
 include/uapi/linux/kvm.h                      |   20 +
 include/uapi/linux/kvm_para.h                 |    5 +
 include/uapi/linux/kvmi.h                     |  245 ++
 tools/testing/selftests/kvm/Makefile          |    1 +
 .../testing/selftests/kvm/x86_64/kvmi_test.c  | 2005 +++++++++++++++++
 virt/kvm/introspection/kvmi.c                 | 1264 +++++++++++
 virt/kvm/introspection/kvmi_int.h             |  129 ++
 virt/kvm/introspection/kvmi_msg.c             |  915 ++++++++
 virt/kvm/kvm_main.c                           |   98 +
 37 files changed, 9525 insertions(+), 162 deletions(-)
 create mode 100644 Documentation/virt/kvm/kvmi.rst
 create mode 100644 arch/x86/include/asm/kvmi_host.h
 create mode 100644 arch/x86/include/uapi/asm/kvmi.h
 create mode 100644 arch/x86/kvm/kvmi.c
 create mode 100644 arch/x86/kvm/kvmi.h
 create mode 100644 arch/x86/kvm/kvmi_msg.c
 create mode 100644 include/linux/kvmi_host.h
 create mode 100644 include/uapi/linux/kvmi.h
 create mode 100644 tools/testing/selftests/kvm/x86_64/kvmi_test.c
 create mode 100644 virt/kvm/introspection/kvmi.c
 create mode 100644 virt/kvm/introspection/kvmi_int.h
 create mode 100644 virt/kvm/introspection/kvmi_msg.c


base-commit: dc924b062488a0376aae41d3e0a27dc99f852a5e
CC: Edwin Zhai <edwin.zhai@intel.com>
CC: Jan Kiszka <jan.kiszka@siemens.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Mathieu Tarral <mathieu.tarral@protonmail.com>
CC: Patrick Colp <patrick.colp@oracle.com>
CC: Samuel Laurén <samuel.lauren@iki.fi>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Tamas K Lengyel <tamas@tklengyel.com>
CC: Weijiang Yang <weijiang.yang@intel.com>
CC: Yu C Zhang <yu.c.zhang@intel.com>
CC: Sean Christopherson <seanjc@google.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: Wanpeng Li <wanpengli@tencent.com>
CC: Jim Mattson <jmattson@google.com>