[GIT PULL] First batch of KVM changes for Linux 6.1

* [GIT PULL] First batch of KVM changes for Linux 6.1
@ 2022-09-30 19:08 Paolo Bonzini
  2022-10-06  0:02 ` Paolo Bonzini
  2022-10-09 21:17 ` pr-tracker-bot
  0 siblings, 2 replies; 3+ messages in thread
From: Paolo Bonzini @ 2022-09-30 19:08 UTC (permalink / raw)
  To: torvalds; +Cc: linux-kernel, kvm

Linus,

The following changes since commit 372d07084593dc7a399bf9bee815711b1fb1bcf2:

  KVM: selftests: Fix ambiguous mov in KVM_ASM_SAFE() (2022-08-19 07:38:05 -0400)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus

for you to fetch changes up to c59fb127583869350256656b7ed848c398bef879:

  KVM: remove KVM_REQ_UNHALT (2022-09-26 12:37:21 -0400)

----------------------------------------------------------------
The first batch of KVM patches, mostly covering x86, which I
am sending out early due to me travelling next week.  There is a
lone mm patch for which Andrew gave an informal ack at
https://lore.kernel.org/linux-mm/20220817102500.440c6d0a3fce296fdf91bea6@linux-foundation.org.

I will send the bulk of ARM work, as well as other
architectures, at the end of next week.

ARM:

* Account stage2 page table allocations in memory stats.

x86:

* Account EPT/NPT arm64 page table allocations in memory stats.

* Tracepoint cleanups/fixes for nested VM-Enter and emulated MSR accesses.

* Drop eVMCS controls filtering for KVM on Hyper-V, all known versions of
  Hyper-V now support eVMCS fields associated with features that are
  enumerated to the guest.

* Use KVM's sanitized VMCS config as the basis for the values of nested VMX
  capabilities MSRs.

* A myriad event/exception fixes and cleanups.  Most notably, pending
  exceptions morph into VM-Exits earlier, as soon as the exception is
  queued, instead of waiting until the next vmentry.  This fixed
  a longstanding issue where the exceptions would incorrecly become
  double-faults instead of triggering a vmexit; the common case of
  page-fault vmexits had a special workaround, but now it's fixed
  for good.

* A handful of fixes for memory leaks in error paths.

* Cleanups for VMREAD trampoline and VMX's VM-Exit assembly flow.

* Never write to memory from non-sleepable kvm_vcpu_check_block()

* Selftests refinements and cleanups.

* Misc typo cleanups.

Generic:

* remove KVM_REQ_UNHALT

----------------------------------------------------------------
Aaron Lewis (1):
      KVM: x86: Delete duplicate documentation for KVM_X86_SET_MSR_FILTER

David Matlack (1):
      KVM: nVMX: Add tracepoint for nested VM-Enter

Hou Wenlong (2):
      KVM: x86: Return emulator error if RDMSR/WRMSR emulation failed
      KVM: x86: Add missing trace points for RDMSR/WRMSR in emulator path

Jilin Yuan (1):
      KVM: x86/mmu: fix repeated words in comments

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

Junaid Shahid (1):
      kvm: x86: Do proper cleanup if kvm_x86_ops->vm_init() fails

Liam Ni (1):
      KVM:x86: Clean up ModR/M "reg" initialization in reg op decoding

Miaohe Lin (2):
      KVM: x86/mmu: fix memoryleak in kvm_mmu_vendor_module_init()
      KVM: fix memoryleak in kvm_init()

Michal Luczaj (1):
      KVM: x86/emulator: Fix handing of POP SS to correctly set interruptibility

Mingwei Zhang (2):
      KVM: x86: Update trace function for nested VM entry to support VMX
      KVM: x86: Print guest pgd in kvm_nested_vmenter()

Oliver Upton (2):
      KVM: selftests: Require DISABLE_NX_HUGE_PAGES cap for NX hugepage test
      mailmap: Update Oliver's email address

Paolo Bonzini (6):
      KVM: SVM: remove unnecessary check on INIT intercept
      KVM: x86: make vendor code check for all nested events
      KVM: x86: lapic does not have to process INIT if it is blocked
      KVM: x86: never write to memory from kvm_vcpu_check_block()
      KVM: mips, x86: do not rely on KVM_REQ_UNHALT
      KVM: remove KVM_REQ_UNHALT

Sean Christopherson (44):
      KVM: x86: Use u64 for address and error code in page fault tracepoint
      KVM: x86: Check for existing Hyper-V vCPU in kvm_hv_vcpu_init()
      KVM: x86: Report error when setting CPUID if Hyper-V allocation fails
      KVM: nVMX: Treat eVMCS as enabled for guest iff Hyper-V is also enabled
      KVM: nVMX: Use CC() macro to handle eVMCS unsupported controls checks
      KVM: nVMX: WARN once and fail VM-Enter if eVMCS sees VMFUNC[63:32] != 0
      KVM: nVMX: Don't propagate vmcs12's PERF_GLOBAL_CTRL settings to vmcs02
      KVM: nVMX: Always emulate PERF_GLOBAL_CTRL VM-Entry/VM-Exit controls
      KVM: VMX: Don't toggle VM_ENTRY_IA32E_MODE for 32-bit kernels/KVM
      KVM: VMX: Adjust CR3/INVPLG interception for EPT=y at runtime, not setup
      KVM: nVMX: Unconditionally purge queued/injected events on nested "exit"
      KVM: VMX: Drop bits 31:16 when shoving exception error code into VMCS
      KVM: x86: Don't check for code breakpoints when emulating on exception
      KVM: x86: Allow clearing RFLAGS.RF on forced emulation to test code #DBs
      KVM: x86: Suppress code #DBs on Intel if MOV/POP SS blocking is active
      KVM: nVMX: Treat General Detect #DB (DR7.GD=1) as fault-like
      KVM: nVMX: Prioritize TSS T-flag #DBs over Monitor Trap Flag
      KVM: x86: Treat #DBs from the emulator as fault-like (code and DR7.GD=1)
      KVM: x86: Use DR7_GD macro instead of open coding check in emulator
      KVM: nVMX: Ignore SIPI that arrives in L2 when vCPU is not in WFS
      KVM: nVMX: Unconditionally clear mtf_pending on nested VM-Exit
      KVM: VMX: Inject #PF on ENCLS as "emulated" #PF
      KVM: x86: Rename kvm_x86_ops.queue_exception to inject_exception
      KVM: x86: Make kvm_queued_exception a properly named, visible struct
      KVM: x86: Formalize blocking of nested pending exceptions
      KVM: x86: Use kvm_queue_exception_e() to queue #DF
      KVM: x86: Hoist nested event checks above event injection logic
      KVM: x86: Evaluate ability to inject SMI/NMI/IRQ after potential VM-Exit
      KVM: nVMX: Add a helper to identify low-priority #DB traps
      KVM: nVMX: Document priority of all known events on Intel CPUs
      KVM: x86: Morph pending exceptions to pending VM-Exits at queue time
      KVM: x86: Treat pending TRIPLE_FAULT requests as pending exceptions
      KVM: VMX: Update MTF and ICEBP comments to document KVM's subtle behavior
      KVM: x86: Rename inject_pending_events() to kvm_check_and_inject_events()
      KVM: selftests: Use uapi header to get VMX and SVM exit reasons/codes
      KVM: selftests: Add an x86-only test to verify nested exception queueing
      KVM: x86: Allow force_emulation_prefix to be written without a reload
      KVM: nVMX: Make an event request when pending an MTF nested VM-Exit
      KVM: x86: Rename and expose helper to detect if INIT/SIPI are allowed
      KVM: x86: Rename kvm_apic_has_events() to make it INIT/SIPI specific
      KVM: SVM: Make an event request if INIT or SIPI is pending when GIF is set
      KVM: nVMX: Make an event request if INIT or SIPI is pending on VM-Enter
      KVM: nVMX: Make event request on VMXOFF iff INIT/SIPI is pending
      KVM: x86: Don't snapshot pending INIT/SIPI prior to checking nested events

Uros Bizjak (2):
      KVM/VMX: Avoid stack engine synchronization uop in __vmx_vcpu_run
      KVM: VMX: Do not declare vmread_error() asmlinkage

Vitaly Kuznetsov (23):
      x86/hyperv: Fix 'struct hv_enlightened_vmcs' definition
      x86/hyperv: Update 'struct hv_enlightened_vmcs' definition
      KVM: x86: Zero out entire Hyper-V CPUID cache before processing entries
      KVM: nVMX: Refactor unsupported eVMCS controls logic to use 2-d array
      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: nVMX: Support PERF_GLOBAL_CTRL with enlightened VMCS
      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

Wonhyuk Yang (1):
      KVM: Add extra information in kvm_page_fault trace point

Yosry Ahmed (3):
      mm: add NR_SECONDARY_PAGETABLE to count secondary page table uses.
      KVM: x86/mmu: count KVM mmu usage in secondary pagetable stats.
      KVM: arm64/mmu: count KVM s2 mmu usage in secondary pagetable stats

 .mailmap                                           |   1 +
 Documentation/admin-guide/cgroup-v2.rst            |   5 +
 Documentation/filesystems/proc.rst                 |   4 +
 Documentation/virt/kvm/api.rst                     | 113 +---
 Documentation/virt/kvm/vcpu-requests.rst           |  28 +-
 arch/arm64/kvm/arm.c                               |   1 -
 arch/arm64/kvm/mmu.c                               |  36 +-
 arch/mips/kvm/emulate.c                            |   6 +-
 arch/powerpc/kvm/book3s_pr.c                       |   1 -
 arch/powerpc/kvm/book3s_pr_papr.c                  |   1 -
 arch/powerpc/kvm/booke.c                           |   1 -
 arch/powerpc/kvm/powerpc.c                         |   1 -
 arch/riscv/kvm/vcpu_insn.c                         |   1 -
 arch/s390/kvm/kvm-s390.c                           |   2 -
 arch/x86/include/asm/hyperv-tlfs.h                 |  22 +-
 arch/x86/include/asm/kvm-x86-ops.h                 |   2 +-
 arch/x86/include/asm/kvm_host.h                    |  39 +-
 arch/x86/kvm/cpuid.c                               |  18 +-
 arch/x86/kvm/emulate.c                             |  31 +-
 arch/x86/kvm/hyperv.c                              |  70 ++-
 arch/x86/kvm/hyperv.h                              |   6 +-
 arch/x86/kvm/lapic.c                               |  38 +-
 arch/x86/kvm/lapic.h                               |   9 +-
 arch/x86/kvm/mmu/mmu.c                             |  22 +-
 arch/x86/kvm/mmu/paging_tmpl.h                     |   2 +-
 arch/x86/kvm/mmu/tdp_mmu.c                         |  12 +
 arch/x86/kvm/svm/nested.c                          | 124 +++--
 arch/x86/kvm/svm/svm.c                             |  35 +-
 arch/x86/kvm/trace.h                               |  53 +-
 arch/x86/kvm/vmx/capabilities.h                    |  14 +-
 arch/x86/kvm/vmx/evmcs.c                           | 192 ++++---
 arch/x86/kvm/vmx/evmcs.h                           |  10 +-
 arch/x86/kvm/vmx/nested.c                          | 468 +++++++++++------
 arch/x86/kvm/vmx/nested.h                          |   2 +-
 arch/x86/kvm/vmx/sgx.c                             |   2 +-
 arch/x86/kvm/vmx/vmenter.S                         |  24 +-
 arch/x86/kvm/vmx/vmx.c                             | 321 ++++++------
 arch/x86/kvm/vmx/vmx.h                             | 172 +++++-
 arch/x86/kvm/vmx/vmx_ops.h                         |   2 +-
 arch/x86/kvm/x86.c                                 | 576 ++++++++++++++-------
 arch/x86/kvm/x86.h                                 |  16 +-
 arch/x86/kvm/xen.c                                 |   1 -
 drivers/base/node.c                                |   2 +
 fs/proc/meminfo.c                                  |   2 +
 include/linux/kvm_host.h                           |  16 +-
 include/linux/mmzone.h                             |   1 +
 mm/memcontrol.c                                    |   1 +
 mm/page_alloc.c                                    |   6 +-
 mm/vmstat.c                                        |   1 +
 tools/testing/selftests/kvm/.gitignore             |   1 +
 tools/testing/selftests/kvm/Makefile               |   1 +
 tools/testing/selftests/kvm/include/x86_64/evmcs.h |  45 +-
 .../selftests/kvm/include/x86_64/svm_util.h        |   7 +-
 tools/testing/selftests/kvm/include/x86_64/vmx.h   |  53 +-
 .../selftests/kvm/x86_64/nested_exceptions_test.c  | 295 +++++++++++
 .../selftests/kvm/x86_64/nx_huge_pages_test.c      |  24 +-
 virt/kvm/kvm_main.c                                |   9 +-
 57 files changed, 1871 insertions(+), 1077 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/nested_exceptions_test.c

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