From: "Adalbert Lazăr" <alazar@bitdefender.com>
To: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Sean Christopherson" <seanjc@google.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
"Wanpeng Li" <wanpengli@tencent.com>,
"Jim Mattson" <jmattson@google.com>,
"Joerg Roedel" <joro@8bytes.org>,
"Mathieu Tarral" <mathieu.tarral@protonmail.com>,
"Tamas K Lengyel" <tamas@tklengyel.com>,
"Adalbert Lazăr" <alazar@bitdefender.com>
Subject: [PATCH v12 00/77] VM introspection
Date: Wed, 6 Oct 2021 20:29:56 +0300 [thread overview]
Message-ID: <20211006173113.26445-1-alazar@bitdefender.com> (raw)
The KVM introspection subsystem provides a facility for applications
running on the host or in a separate VM, to control the execution of
other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs,
MSRs etc.), alter the page access bits in the shadow page tables (only
for the hardware backed ones, eg. Intel's EPT) and receive notifications
when events of interest have taken place (shadow page table level faults,
key MSR writes, hypercalls etc.). Some notifications can be responded
to with an action (like preventing an MSR from being written), others
are mere informative (like breakpoint events which can be used for
execution tracing). With few exceptions, all events are optional. An
application using this subsystem will explicitly register for them.
The use case that gave way for the creation of this subsystem is to
monitor the guest OS and as such the ABI/API is highly influenced by how
the guest software (kernel, applications) sees the world. For example,
some events provide information specific for the host CPU architecture
(eg. MSR_IA32_SYSENTER_EIP) merely because its leveraged by guest software
to implement a critical feature (fast system calls).
At the moment, the target audience for KVMI are security software authors
that wish to perform forensics on newly discovered threats (exploits)
or to implement another layer of security like preventing a large set
of kernel rootkits simply by "locking" the kernel image in the shadow
page tables (ie. enforce .text r-x, .rodata rw- etc.). It's the latter
case that made KVMI a separate subsystem, even though many of these
features are available in the device manager. The ability to build a
security application that does not interfere (in terms of performance)
with the guest software asks for a specialized interface that is designed
for minimum overhead.
Patches 1-28: make preparatory changes
Patches 29-75: add basic introspection capabilities
Patch 76: support introspection tools that write-protect guest page tables
Patch 77: notify the introspection tool even on emulation failures
(when the read/write callbacks used by the emulator,
kvm_page_preread/kvm_page_prewrite, are not called)
Changes since [v11](https://lore.kernel.org/kvm/20201207204622.15258-1-alazar@bitdefender.com/):
- rebase to 5.15 (from 5.10)
- remove patches no longer needed
- remove kvm_get_max_gfn()/KVMI_VM_GET_MAX_GFN (a couple of tests are needed to see
if it is better to send the memory size from QEMU, during handshake)
Adalbert Lazăr (23):
KVM: UAPI: add error codes used by the VM introspection code
KVM: add kvm_vcpu_kick_and_wait()
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 (32):
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: 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
Documentation/virt/kvm/api.rst | 160 ++
Documentation/virt/kvm/hypercalls.rst | 35 +
Documentation/virt/kvm/kvmi.rst | 1554 +++++++++++++
arch/x86/include/asm/kvm-x86-ops.h | 10 +
arch/x86/include/asm/kvm_host.h | 46 +-
arch/x86/include/asm/kvm_page_track.h | 69 +-
arch/x86/include/asm/kvmi_host.h | 111 +
arch/x86/include/asm/vmx.h | 2 +
arch/x86/include/uapi/asm/kvmi.h | 167 ++
arch/x86/kvm/Kconfig | 10 +
arch/x86/kvm/Makefile | 2 +
arch/x86/kvm/emulate.c | 4 +
arch/x86/kvm/kvm_emulate.h | 1 +
arch/x86/kvm/kvmi.c | 1134 ++++++++++
arch/x86/kvm/kvmi.h | 24 +
arch/x86/kvm/kvmi_msg.c | 456 ++++
arch/x86/kvm/mmu/mmu.c | 158 +-
arch/x86/kvm/mmu/mmu_internal.h | 6 +
arch/x86/kvm/mmu/page_track.c | 144 +-
arch/x86/kvm/mmu/spte.c | 23 +
arch/x86/kvm/mmu/tdp_mmu.c | 106 +
arch/x86/kvm/mmu/tdp_mmu.h | 6 +
arch/x86/kvm/svm/sev.c | 18 +-
arch/x86/kvm/svm/svm.c | 303 ++-
arch/x86/kvm/svm/svm.h | 10 +-
arch/x86/kvm/vmx/capabilities.h | 7 +-
arch/x86/kvm/vmx/vmx.c | 150 +-
arch/x86/kvm/vmx/vmx.h | 4 -
arch/x86/kvm/x86.c | 301 ++-
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 | 240 ++
tools/testing/selftests/kvm/Makefile | 1 +
.../testing/selftests/kvm/x86_64/kvmi_test.c | 1993 +++++++++++++++++
virt/kvm/introspection/kvmi.c | 1265 +++++++++++
virt/kvm/introspection/kvmi_int.h | 129 ++
virt/kvm/introspection/kvmi_msg.c | 902 ++++++++
virt/kvm/kvm_main.c | 73 +
41 files changed, 9618 insertions(+), 159 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: 542a2640a2f491902fd366b5bb54a2b20ac5a2c5
next reply other threads:[~2021-10-06 17:42 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 17:29 Adalbert Lazăr [this message]
2021-10-06 17:29 ` [PATCH v12 01/77] KVM: UAPI: add error codes used by the VM introspection code Adalbert Lazăr
2021-10-06 17:29 ` [PATCH v12 02/77] KVM: add kvm_vcpu_kick_and_wait() Adalbert Lazăr
2021-10-06 17:29 ` [PATCH v12 03/77] KVM: x86: add kvm_arch_vcpu_get_regs() and kvm_arch_vcpu_get_sregs() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 04/77] KVM: x86: add kvm_arch_vcpu_set_regs() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 05/77] KVM: x86: avoid injecting #PF when emulate the VMCALL instruction Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 06/77] KVM: x86: add kvm_x86_ops.bp_intercepted() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 07/77] KVM: x86: add kvm_x86_ops.control_cr3_intercept() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 08/77] KVM: x86: add kvm_x86_ops.cr3_write_intercepted() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 09/77] KVM: x86: add kvm_x86_ops.desc_ctrl_supported() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 10/77] KVM: svm: add support for descriptor-table VM-exits Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 11/77] KVM: x86: add kvm_x86_ops.control_desc_intercept() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 12/77] KVM: x86: add kvm_x86_ops.desc_intercepted() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 13/77] KVM: x86: add kvm_x86_ops.msr_write_intercepted() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 14/77] KVM: x86: svm: use the vmx convention to control the MSR interception Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 15/77] KVM: x86: add kvm_x86_ops.control_msr_intercept() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 16/77] KVM: x86: save the error code during EPT/NPF exits handling Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 17/77] KVM: x86: add kvm_x86_ops.fault_gla() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 18/77] KVM: x86: add kvm_x86_ops.control_singlestep() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 19/77] KVM: x86: export kvm_arch_vcpu_set_guest_debug() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 20/77] KVM: x86: extend kvm_mmu_gva_to_gpa_system() with the 'access' parameter Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 21/77] KVM: x86: export kvm_inject_pending_exception() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 22/77] KVM: x86: export kvm_vcpu_ioctl_x86_get_xsave() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 23/77] KVM: x86: export kvm_vcpu_ioctl_x86_set_xsave() Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 24/77] KVM: x86: page track: provide all callbacks with the guest virtual address Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 25/77] KVM: x86: page track: add track_create_slot() callback Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 26/77] KVM: x86: page_track: add support for preread, prewrite and preexec Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 27/77] KVM: x86: wire in the preread/prewrite/preexec page trackers Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 28/77] KVM: x86: disable gpa_available optimization for fetch and page-walk SPT violations Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 29/77] KVM: introduce VM introspection Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 30/77] KVM: introspection: add hook/unhook ioctls Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 31/77] KVM: introspection: add permission access ioctls Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 32/77] KVM: introspection: add the read/dispatch message function Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 33/77] KVM: introspection: add KVMI_GET_VERSION Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 34/77] KVM: introspection: add KVMI_VM_CHECK_COMMAND and KVMI_VM_CHECK_EVENT Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 35/77] KVM: introspection: add KVMI_VM_GET_INFO Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 36/77] KVM: introspection: add KVM_INTROSPECTION_PREUNHOOK Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 37/77] KVM: introspection: add KVMI_VM_EVENT_UNHOOK Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 38/77] KVM: introspection: add KVMI_VM_CONTROL_EVENTS Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 39/77] KVM: introspection: add KVMI_VM_READ_PHYSICAL/KVMI_VM_WRITE_PHYSICAL Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 40/77] KVM: introspection: add vCPU related data Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 41/77] KVM: introspection: add a jobs list to every introspected vCPU Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 42/77] KVM: introspection: handle vCPU introspection requests Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 43/77] KVM: introspection: handle vCPU commands Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 44/77] KVM: introspection: add KVMI_VCPU_GET_INFO Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 45/77] KVM: introspection: add KVMI_VM_PAUSE_VCPU Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 46/77] KVM: introspection: add support for vCPU events Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 47/77] KVM: introspection: add KVMI_VCPU_EVENT_PAUSE Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 48/77] KVM: introspection: add the crash action handling on the event reply Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 49/77] KVM: introspection: add KVMI_VCPU_CONTROL_EVENTS Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 50/77] KVM: introspection: add KVMI_VCPU_GET_REGISTERS Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 51/77] KVM: introspection: add KVMI_VCPU_SET_REGISTERS Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 52/77] KVM: introspection: add KVMI_VCPU_GET_CPUID Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 53/77] KVM: introspection: add KVMI_VCPU_EVENT_HYPERCALL Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 54/77] KVM: introspection: add KVMI_VCPU_EVENT_BREAKPOINT Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 55/77] KVM: introspection: add cleanup support for vCPUs Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 56/77] KVM: introspection: restore the state of #BP interception on unhook Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 57/77] KVM: introspection: add KVMI_VM_CONTROL_CLEANUP Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 58/77] KVM: introspection: add KVMI_VCPU_CONTROL_CR and KVMI_VCPU_EVENT_CR Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 59/77] KVM: introspection: restore the state of CR3 interception on unhook Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 60/77] KVM: introspection: add KVMI_VCPU_INJECT_EXCEPTION + KVMI_VCPU_EVENT_TRAP Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 61/77] KVM: introspection: add KVMI_VCPU_EVENT_XSETBV Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 62/77] KVM: introspection: add KVMI_VCPU_GET_XCR Adalbert Lazăr
2021-10-06 17:30 ` [PATCH v12 63/77] KVM: introspection: add KVMI_VCPU_GET_XSAVE Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 64/77] KVM: introspection: add KVMI_VCPU_SET_XSAVE Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 65/77] KVM: introspection: add KVMI_VCPU_GET_MTRR_TYPE Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 66/77] KVM: introspection: add KVMI_VCPU_EVENT_DESCRIPTOR Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 67/77] KVM: introspection: restore the state of descriptor-table register interception on unhook Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 68/77] KVM: introspection: add KVMI_VCPU_CONTROL_MSR and KVMI_VCPU_EVENT_MSR Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 69/77] KVM: introspection: restore the state of MSR interception on unhook Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 70/77] KVM: introspection: add KVMI_VM_SET_PAGE_ACCESS Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 71/77] KVM: introspection: add KVMI_VCPU_EVENT_PF Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 72/77] KVM: introspection: extend KVMI_GET_VERSION with struct kvmi_features Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 73/77] KVM: introspection: add KVMI_VCPU_CONTROL_SINGLESTEP Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 74/77] KVM: introspection: add KVMI_VCPU_EVENT_SINGLESTEP Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 75/77] KVM: introspection: add KVMI_VCPU_TRANSLATE_GVA Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 76/77] KVM: introspection: emulate a guest page table walk on SPT violations due to A/D bit updates Adalbert Lazăr
2021-10-06 17:31 ` [PATCH v12 77/77] KVM: x86: call the page tracking code on emulation failure Adalbert Lazăr
2021-10-25 9:25 ` [PATCH v12 00/77] VM introspection Mathieu Tarral
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