Re: [PATCH 0/2] KVM: VMX: Mark Intel PT virtualization as BROKEN

Sean Christopherson
2024-12-19T02:44:51Z

On Fri, 01 Nov 2024 11:50:29 -0700, Sean Christopherson wrote:
> Hide Intel PT virtualization behind BROKEN, as it has multiple fatal
> flaws, several which put the host at risk, and several of which are far
> too invasive to backport to stable trees.
>
> I included one of the easier fixes from Adrian to help show just how
> broken PT virtualization is, e.g. to illustrate the apparent lack of usage.
>
> [...]

Applied patch 2 to kvm-x86 vmx (patch 1 already went in).

[1/2] KVM: VMX: Bury Intel PT virtualization (guest/host mode) behind CONFIG_BROKEN
(no commit info)
[2/2] KVM: VMX: Allow toggling bits in MSR_IA32_RTIT_CTL when enable bit is cleared
https://github.com/kvm-x86/linux/commit/591ff4670c7b

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