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

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@vger.kernel.org Signed-off-by: Maxim Levitsky mlevitsk@redhat.com

---

Reviewed-by: Sean Christopherson seanjc@google.com