linux-kernel - Re: [GIT PULL] KVM: x86: Selftests changes for 6.19

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Message-ID: <CABgObfa+cVCi=+++BCY9cYXJtXZgXBG3FnzHH47aPuHP_uhMEw@mail.gmail.com>
Date: Wed, 26 Nov 2025 09:51:29 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] KVM: x86: Selftests changes for 6.19

On Wed, Nov 26, 2025 at 2:45 AM Sean Christopherson <seanjc@...gle.com> wrote:
>
> The highlights are Jim's LA57 nested VMX test, and Yosry's many changes to
> extend nested VMX tests to also cover nested SVM.
>
> The following changes since commit 211ddde0823f1442e4ad052a2f30f050145ccada:
>
>   Linux 6.18-rc2 (2025-10-19 15:19:16 -1000)
>
> are available in the Git repository at:
>
>   https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests-6.19
>
> for you to fetch changes up to d2e50389ab44acfa05e72604d701a70b234f9938:
>
>   KVM: selftests: Make sure vm->vpages_mapped is always up-to-date (2025-11-21 10:17:05 -0800)

Pulled, thanks.

Paolo

> ----------------------------------------------------------------
> KVM selftests changes for 6.19:
>
>  - Fix a math goof in mmu_stress_test when running on a single-CPU system/VM.
>
>  - Forcefully override ARCH from x86_64 to x86 to play nice with specifying
>    ARCH=x86_64 on the command line.
>
>  - Extend a bunch of nested VMX to validate nested SVM as well.
>
>  - Add support for LA57 in the core VM_MODE_xxx macro, and add a test to
>    verify KVM can save/restore nested VMX state when L1 is using 5-level
>    paging, but L2 is not.
>
>  - Clean up the guest paging code in anticipation of sharing the core logic for
>    nested EPT and nested NPT.
>
> ----------------------------------------------------------------
> Brendan Jackman (1):
>       KVM: selftests: Don't fall over in mmu_stress_test when only one CPU is present
>
> Jim Mattson (4):
>       KVM: selftests: Use a loop to create guest page tables
>       KVM: selftests: Use a loop to walk guest page tables
>       KVM: selftests: Change VM_MODE_PXXV48_4K to VM_MODE_PXXVYY_4K
>       KVM: selftests: Add a VMX test for LA57 nested state
>
> Sean Christopherson (2):
>       KVM: selftests: Forcefully override ARCH from x86_64 to x86
>       KVM: selftests: Use "gpa" and "gva" for local variable names in pre-fault test
>
> Yosry Ahmed (9):
>       KVM: selftests: Extend vmx_close_while_nested_test to cover SVM
>       KVM: selftests: Extend vmx_nested_tsc_scaling_test to cover SVM
>       KVM: selftests: Move nested invalid CR3 check to its own test
>       KVM: selftests: Extend nested_invalid_cr3_test to cover SVM
>       KVM: selftests: Extend vmx_tsc_adjust_test to cover SVM
>       KVM: selftests: Stop hardcoding PAGE_SIZE in x86 selftests
>       KVM: selftests: Remove the unused argument to prepare_eptp()
>       KVM: selftests: Stop using __virt_pg_map() directly in tests
>       KVM: selftests: Make sure vm->vpages_mapped is always up-to-date
>
>  tools/testing/selftests/kvm/Makefile               |   2 +-
>  tools/testing/selftests/kvm/Makefile.kvm           |   8 +-
>  tools/testing/selftests/kvm/include/kvm_util.h     |   5 +-
>  .../testing/selftests/kvm/include/x86/processor.h  |   2 +-
>  tools/testing/selftests/kvm/include/x86/vmx.h      |   3 +-
>  tools/testing/selftests/kvm/lib/arm64/processor.c  |   2 +-
>  tools/testing/selftests/kvm/lib/kvm_util.c         |  33 +++---
>  tools/testing/selftests/kvm/lib/x86/memstress.c    |   2 +-
>  tools/testing/selftests/kvm/lib/x86/processor.c    |  84 ++++++-------
>  tools/testing/selftests/kvm/lib/x86/vmx.c          |   9 +-
>  tools/testing/selftests/kvm/mmu_stress_test.c      |  10 +-
>  .../testing/selftests/kvm/pre_fault_memory_test.c  |  32 +++--
>  tools/testing/selftests/kvm/x86/hyperv_features.c  |   2 +-
>  tools/testing/selftests/kvm/x86/hyperv_ipi.c       |  18 +--
>  tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c |   2 +-
>  ...while_nested_test.c => nested_close_kvm_test.c} |  42 +++++--
>  .../selftests/kvm/x86/nested_invalid_cr3_test.c    | 116 ++++++++++++++++++
>  ..._tsc_adjust_test.c => nested_tsc_adjust_test.c} |  73 +++++++-----
>  ...sc_scaling_test.c => nested_tsc_scaling_test.c} |  48 +++++++-
>  tools/testing/selftests/kvm/x86/sev_smoke_test.c   |   2 +-
>  tools/testing/selftests/kvm/x86/state_test.c       |   2 +-
>  .../testing/selftests/kvm/x86/userspace_io_test.c  |   2 +-
>  .../testing/selftests/kvm/x86/vmx_dirty_log_test.c |  12 +-
>  .../selftests/kvm/x86/vmx_nested_la57_state_test.c | 132 +++++++++++++++++++++
>  24 files changed, 479 insertions(+), 164 deletions(-)
>  rename tools/testing/selftests/kvm/x86/{vmx_close_while_nested_test.c => nested_close_kvm_test.c} (64%)
>  create mode 100644 tools/testing/selftests/kvm/x86/nested_invalid_cr3_test.c
>  rename tools/testing/selftests/kvm/x86/{vmx_tsc_adjust_test.c => nested_tsc_adjust_test.c} (61%)
>  rename tools/testing/selftests/kvm/x86/{vmx_nested_tsc_scaling_test.c => nested_tsc_scaling_test.c} (83%)
>  create mode 100644 tools/testing/selftests/kvm/x86/vmx_nested_la57_state_test.c
>