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Message-ID: <CABgObfZRt+QbaBRuWxdhf800YqSxwFpwk0Z+CxiFfnDFEVyjQQ@mail.gmail.com>
Date: Mon, 9 Feb 2026 18:46:29 +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: selftests changes for 6.20
On Sat, Feb 7, 2026 at 5:10 AM Sean Christopherson <seanjc@...gle.com> wrote:
>
> Stub in stage-2 MMU support in the core infrastructure, and extend x86's MMU
> infrastructure to support EPT and NPT. As noted in the cover letter, this
> conflicts with some RISC-V changes.
>
> The following changes since commit 9ace4753a5202b02191d54e9fdf7f9e3d02b85eb:
>
> Linux 6.19-rc4 (2026-01-04 14:41:55 -0800)
>
> are available in the Git repository at:
>
> https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests-6.20
>
> for you to fetch changes up to a91cc48246605af9aeef1edd32232976d74d9502:
>
> KVM: selftests: Test READ=>WRITE dirty logging behavior for shadow MMU (2026-01-16 07:48:54 -0800)
>
> ----------------------------------------------------------------
> KVM selftests changes for 6.20
>
> - Add a regression test for TPR<=>CR8 synchronization and IRQ masking.
>
> - Overhaul selftest's MMU infrastructure to genericize stage-2 MMU support,
> and extend x86's infrastructure to support EPT and NPT (for L2 guests).
>
> - Extend several nested VMX tests to also cover nested SVM.
>
> - Add a selftest for nested VMLOAD/VMSAVE.
>
> - Rework the nested dirty log test, originally added as a regression test for
> PML where KVM logged L2 GPAs instead of L1 GPAs, to improve test coverage
> and to hopefully make the test easier to understand and maintain.
Pulled, thanks.
Paolo
> ----------------------------------------------------------------
> MJ Pooladkhay (1):
> KVM: selftests: Fix sign extension bug in get_desc64_base()
>
> Maciej S. Szmigiero (1):
> KVM: selftests: Test TPR / CR8 sync and interrupt masking
>
> Sean Christopherson (7):
> KVM: selftests: Add "struct kvm_mmu" to track a given MMU instance
> KVM: selftests: Plumb "struct kvm_mmu" into x86's MMU APIs
> KVM: selftests: Add a "struct kvm_mmu_arch arch" member to kvm_mmu
> KVM: selftests: Add a stage-2 MMU instance to kvm_vm
> KVM: selftests: Move TDP mapping functions outside of vmx.c
> KVM: selftests: Rename vm_get_page_table_entry() to vm_get_pte()
> KVM: selftests: Test READ=>WRITE dirty logging behavior for shadow MMU
>
> Yosry Ahmed (16):
> KVM: selftests: Make __vm_get_page_table_entry() static
> KVM: selftests: Stop passing a memslot to nested_map_memslot()
> KVM: selftests: Rename nested TDP mapping functions
> KVM: selftests: Kill eptPageTablePointer
> KVM: selftests: Stop setting A/D bits when creating EPT PTEs
> KVM: selftests: Move PTE bitmasks to kvm_mmu
> KVM: selftests: Use a TDP MMU to share EPT page tables between vCPUs
> KVM: selftests: Stop passing VMX metadata to TDP mapping functions
> KVM: selftests: Reuse virt mapping functions for nested EPTs
> KVM: selftests: Allow kvm_cpu_has_ept() to be called on AMD CPUs
> KVM: selftests: Add support for nested NPTs
> KVM: selftests: Set the user bit on nested NPT PTEs
> KVM: selftests: Extend vmx_dirty_log_test to cover SVM
> KVM: selftests: Extend memstress to run on nested SVM
> KVM: selftests: Slightly simplify memstress_setup_nested()
> KVM: selftests: Add a selftests for nested VMLOAD/VMSAVE
>
> tools/testing/selftests/kvm/Makefile.kvm | 4 +-
> .../selftests/kvm/include/arm64/kvm_util_arch.h | 2 +
> tools/testing/selftests/kvm/include/kvm_util.h | 18 +-
> .../kvm/include/loongarch/kvm_util_arch.h | 1 +
> .../selftests/kvm/include/riscv/kvm_util_arch.h | 1 +
> .../selftests/kvm/include/s390/kvm_util_arch.h | 1 +
> tools/testing/selftests/kvm/include/x86/apic.h | 3 +
> .../selftests/kvm/include/x86/kvm_util_arch.h | 22 ++
> .../testing/selftests/kvm/include/x86/processor.h | 65 +++--
> tools/testing/selftests/kvm/include/x86/svm_util.h | 9 +
> tools/testing/selftests/kvm/include/x86/vmx.h | 16 +-
> tools/testing/selftests/kvm/lib/arm64/processor.c | 38 +--
> tools/testing/selftests/kvm/lib/kvm_util.c | 28 +-
> .../selftests/kvm/lib/loongarch/processor.c | 28 +-
> tools/testing/selftests/kvm/lib/riscv/processor.c | 31 +--
> tools/testing/selftests/kvm/lib/s390/processor.c | 16 +-
> tools/testing/selftests/kvm/lib/x86/memstress.c | 65 +++--
> tools/testing/selftests/kvm/lib/x86/processor.c | 237 +++++++++++++----
> tools/testing/selftests/kvm/lib/x86/svm.c | 27 ++
> tools/testing/selftests/kvm/lib/x86/vmx.c | 251 ++++--------------
> tools/testing/selftests/kvm/x86/hyperv_tlb_flush.c | 2 +-
> .../selftests/kvm/x86/nested_dirty_log_test.c | 293 +++++++++++++++++++++
> .../selftests/kvm/x86/nested_vmsave_vmload_test.c | 197 ++++++++++++++
> .../kvm/x86/smaller_maxphyaddr_emulation_test.c | 4 +-
> .../testing/selftests/kvm/x86/vmx_dirty_log_test.c | 179 -------------
> .../selftests/kvm/x86/vmx_nested_la57_state_test.c | 2 +-
> tools/testing/selftests/kvm/x86/xapic_tpr_test.c | 276 +++++++++++++++++++
> 27 files changed, 1244 insertions(+), 572 deletions(-)
> create mode 100644 tools/testing/selftests/kvm/x86/nested_dirty_log_test.c
> create mode 100644 tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c
> delete mode 100644 tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c
> create mode 100644 tools/testing/selftests/kvm/x86/xapic_tpr_test.c
>
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