Re: [PATCH v2 2/4] x86: KVM: SVM: add support for Invalid IPI Vector interception

[Sean Christopherson]

On Thu, Sep 28, 2023, Maxim Levitsky wrote:
> In later revisions of AMD's APM, there is a new 'incomplete IPI' exit code:
> 
> "Invalid IPI Vector - The vector for the specified IPI was set to an
> illegal value (VEC < 16)"
> 
> Note that tests on Zen2 machine show that this VM exit doesn't happen and
> instead AVIC just does nothing.
> 
> Add support for this exit code by doing nothing, instead of filling
> the kernel log with errors.
> 
> Also replace an unthrottled 'pr_err()' if another unknown incomplete
> IPI exit happens with vcpu_unimpl()
> 
> (e.g in case AMD adds yet another 'Invalid IPI' exit reason)
> 
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
> ---

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>