Re: [PATCH v2 3/3] KVM: x86: Add a module param to control and enumerate device posted IRQs

Jim Mattson
2025-03-20T16:02:29Z

On Thu, Mar 20, 2025 at 7:31 AM Sean Christopherson <seanjc@google.com> wrote:
>
> Add a module param to allow disabling device posted interrupts without
> having to sacrifice all of APICv/AVIC, and to also effectively enumerate
> to userspace whether or not KVM may be utilizing device posted IRQs.
> Disabling device posted interrupts is very desirable for testing, and can
> even be desirable for production environments, e.g. if the host kernel
> wants to interpose on device interrupts.

Are you referring to CONFIG_X86_POSTED_MSI, or something else that
doesn't exist yet?