[PATCH v2 0/4] KVM: selftests: Test SET_NESTED_STATE with 48-bit L2 on 57-bit L1

[Sean Christopherson]

On Tue, 28 Oct 2025 15:30:38 -0700, Jim Mattson wrote:
> Prior to commit 9245fd6b8531 ("KVM: x86: model canonical checks more
> precisely"), KVM_SET_NESTED_STATE would fail if the state was captured
> with L2 active, L1 had CR4.LA57 set, L2 did not, and the
> VMCS12.HOST_GSBASE (or other host-state field checked for canonicality)
> had an address greater than 48 bits wide.
> 
> Add a regression test that reproduces the KVM_SET_NESTED_STATE failure
> conditions. To do so, the first three patches add support for 5-level
> paging in the selftest L1 VM.
> 
> [...]

Applied to kvm-x86 selftests, thanks!

[1/4] KVM: selftests: Use a loop to create guest page tables
      https://github.com/kvm-x86/linux/commit/ae5b498b8da9
[2/4] KVM: selftests: Use a loop to walk guest page tables
      https://github.com/kvm-x86/linux/commit/2103a8baf5cb
[3/4] KVM: selftests: Change VM_MODE_PXXV48_4K to VM_MODE_PXXVYY_4K
      https://github.com/kvm-x86/linux/commit/ec5806639e39
[4/4] KVM: selftests: Add a VMX test for LA57 nested state
      https://github.com/kvm-x86/linux/commit/6a8818de21d2

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https://github.com/kvm-x86/linux/tree/next