# Re: \[PATCH RESEND v9 33/36\] KVM: VMX: Add VMX\_DO\_FRED\_EVENT\_IRQOFF for IRQ/NMI handling

- From: Sean Christopherson \<seanjc@google.com\>
- Date: 2023-08-01 19:49:10 
- List: linux-hyperv
- Page: https://ratatoskr.run/linux-hyperv/2023/08/2287758
- Thread: https://ratatoskr.run/linux-doc/2023/08/2286860/t.md

```text
On Tue, Aug 01, 2023, Peter Zijlstra wrote:
> On Tue, Aug 01, 2023 at 07:01:15PM +0000, Sean Christopherson wrote:
> > The spec I have from May 2022 says the NMI bit colocated with CS, not SS.  And
> > the cover letter's suggestion to use a search engine to find the spec ain't
> > exactly helpful, that just gives me the same "May 2022 Revision 3.0" spec.  So
> > either y'all have a spec that I can't find, or this is wrong.
> 
> https://intel.com/sdm
> 
> is a useful shorthand I've recently been told about.

Hallelujah!

> On that page is also "Flexible Return and Event Delivery Specification", when
> clicked it will gift you a FRED v5.0 PDF.

Worked for me, too.  Thanks!
```