Re: [PATCH 0/2] KVM: x86: Fix dirty logging of emulated atomics

From: Sean Christopherson
Date: Fri Feb 16 2024 - 20:15:32 EST


On Wed, 14 Feb 2024 17:00:02 -0800, Sean Christopherson wrote:
> Fix a bug in KVM's emulator where the target page of an atomic write isn't
> marked dirty, and enhance the dirty_log_test selftest to serve as
> a regression test by conditionally doing forced emulation of guest writes.
>
> Note, the selftest depends on several patches that are sitting in
> `kvm-x86 pmu`, so I'll likely take the selftest through that branch (eww).
>
> [...]

Applied the fix itself to kvm-x86 fixes, I'll follow up with a heftier version
of the selftest patch for 6.9.

[1/2] KVM: x86: Mark target gfn of emulated atomic instruction as dirty
https://github.com/kvm-x86/linux/commit/910c57dfa4d1

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