Re: [PATCH v2 0/7] KVM: nVMX: Fix IPIv vs. nested posted interrupts

[Sean Christopherson]

On Thu, 05 Sep 2024 21:34:06 -0700, Sean Christopherson wrote:
> Fix a bug where KVM injects L2's nested posted interrupt into L1 as a
> nested VM-Exit instead of triggering PI processing.  The actual bug is
> technically a generic nested posted interrupts problem, but due to the
> way that KVM handles interrupt delivery, the issue is mostly limited to
> to IPI virtualization being enabled.
> 
> Found by the nested posted interrupt KUT test on SPR.
> 
> [...]

Trying this again, hopefully with less awful testing this time...

Applied to kvm-x86 vmx.

[1/7] KVM: x86: Move "ack" phase of local APIC IRQ delivery to separate API
      https://github.com/kvm-x86/linux/commit/a194a3a13ce0
[2/7] KVM: nVMX: Get to-be-acknowledge IRQ for nested VM-Exit at injection site
      https://github.com/kvm-x86/linux/commit/363010e1dd0e
[3/7] KVM: nVMX: Suppress external interrupt VM-Exit injection if there's no IRQ
      https://github.com/kvm-x86/linux/commit/8c23670f2b00
[4/7] KVM: nVMX: Detect nested posted interrupt NV at nested VM-Exit injection
      https://github.com/kvm-x86/linux/commit/6e0b456547f4
[5/7] KVM: x86: Fold kvm_get_apic_interrupt() into kvm_cpu_get_interrupt()
      https://github.com/kvm-x86/linux/commit/aa9477966aab
[6/7] KVM: nVMX: Explicitly invalidate posted_intr_nv if PI is disabled at VM-Enter
      https://github.com/kvm-x86/linux/commit/1ed0f119c5ff
[7/7] KVM: nVMX: Assert that vcpu->mutex is held when accessing secondary VMCSes
      https://github.com/kvm-x86/linux/commit/3dde46a21aa7

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