linux-kernel - [PATCH v4 00/25] KVM: VMX: Support updated eVMCSv1 revision + use vmcs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220714091327.1085353-1-vkuznets@redhat.com>
Date:   Thu, 14 Jul 2022 11:13:02 +0200
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 00/25] KVM: VMX: Support updated eVMCSv1 revision + use vmcs_config for L1 VMX MSRs

Changes since v3 [Max]:
- Fix swapped encls_exiting_bitmap and host_ia32_perf_global_ctrl fields.
- Wipe 'hv_vcpu->cpuid_cache' with memset() on update.
- Add a comment explaining made-up HV_X64_NESTED_EVMCS1_2022_UPDATE name
  and what this bit means.
- Add R-b tags.

Original description:

Enlightened VMCS v1 definition was updates to include fields for the
following features:
    - PerfGlobalCtrl
    - EnclsExitingBitmap
    - TSC scaling
    - GuestLbrCtl
    - CET
    - SSP
While the information is missing in the publicly available TLFS, the
updated definition comes with a new feature bit in CPUID.0x4000000A.EBX
(BIT 0). Use a made up HV_X64_NESTED_EVMCS1_2022_UPDATE name for it.

Add support for the new revision to KVM. SSP, CET and GuestLbrCtl
features are not currently supported by KVM.

While on it, implement Sean's idea to use vmcs_config for setting up
L1 VMX control MSRs instead of re-reading host MSRs.

Jim Mattson (1):
  KVM: x86: VMX: Replace some Intel model numbers with mnemonics

Sean Christopherson (1):
  KVM: VMX: Adjust CR3/INVPLG interception for EPT=y at runtime, not
    setup

Vitaly Kuznetsov (23):
  KVM: x86: hyper-v: Expose access to debug MSRs in the partition
    privilege flags
  x86/hyperv: Fix 'struct hv_enlightened_vmcs' definition
  x86/hyperv: Update 'struct hv_enlightened_vmcs' definition
  KVM: VMX: Define VMCS-to-EVMCS conversion for the new fields
  KVM: nVMX: Support several new fields in eVMCSv1
  KVM: x86: hyper-v: Cache HYPERV_CPUID_NESTED_FEATURES CPUID leaf
  KVM: selftests: Add ENCLS_EXITING_BITMAP{,HIGH} VMCS fields
  KVM: selftests: Switch to updated eVMCSv1 definition
  KVM: VMX: nVMX: Support TSC scaling and PERF_GLOBAL_CTRL with
    enlightened VMCS
  KVM: selftests: Enable TSC scaling in evmcs selftest
  KVM: VMX: Get rid of eVMCS specific VMX controls sanitization
  KVM: VMX: Check VM_ENTRY_IA32E_MODE in setup_vmcs_config()
  KVM: VMX: Check CPU_BASED_{INTR,NMI}_WINDOW_EXITING in
    setup_vmcs_config()
  KVM: VMX: Tweak the special handling of SECONDARY_EXEC_ENCLS_EXITING
    in setup_vmcs_config()
  KVM: VMX: Extend VMX controls macro shenanigans
  KVM: VMX: Move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering out of
    setup_vmcs_config()
  KVM: VMX: Add missing VMEXIT controls to vmcs_config
  KVM: VMX: Add missing CPU based VM execution controls to vmcs_config
  KVM: VMX: Move LOAD_IA32_PERF_GLOBAL_CTRL errata handling out of
    setup_vmcs_config()
  KVM: nVMX: Always set required-1 bits of pinbased_ctls to
    PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR
  KVM: nVMX: Use sanitized allowed-1 bits for VMX control MSRs
  KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs_config
  KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up
    nested MSR

 arch/x86/include/asm/hyperv-tlfs.h            |  30 ++-
 arch/x86/include/asm/kvm_host.h               |   2 +
 arch/x86/kvm/hyperv.c                         |  20 +-
 arch/x86/kvm/vmx/capabilities.h               |  14 +-
 arch/x86/kvm/vmx/evmcs.c                      | 127 +++++++---
 arch/x86/kvm/vmx/evmcs.h                      |  18 +-
 arch/x86/kvm/vmx/nested.c                     |  70 ++++--
 arch/x86/kvm/vmx/nested.h                     |   2 +-
 arch/x86/kvm/vmx/vmx.c                        | 235 ++++++++----------
 arch/x86/kvm/vmx/vmx.h                        | 116 +++++++++
 include/asm-generic/hyperv-tlfs.h             |   2 +
 .../selftests/kvm/include/x86_64/evmcs.h      |  45 +++-
 .../selftests/kvm/include/x86_64/vmx.h        |   2 +
 .../testing/selftests/kvm/x86_64/evmcs_test.c |  31 ++-
 14 files changed, 484 insertions(+), 230 deletions(-)

-- 
2.35.3