Re: [patch V3 16/22] genirq/msi: Provide new domain id based interfaces for freeing interrupts

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

David!

On Mon, Jan 16 2023 at 19:28, David Woodhouse wrote:
> On Mon, 2023-01-16 at 20:22 +0100, Thomas Gleixner wrote:
>> > Tested-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
>> > 
>> > Albeit only under qemu with
>> > https://git.infradead.org/users/dwmw2/qemu.git/shortlog/refs/heads/xenfv
>> > and not under real Xen.
>> 
>> Five levels of emulation. What could possibly go wrong?
>
> It's the opposite — this is what happened when I threw my toys out of
> the pram and said, "You're NOT doing that with nested virtualization!".
>
> One level of emulation. We host guests that think they're running on
> Xen, directly in QEMU/KVM by handling the hypercalls and event
> channels, grant tables, etc.
>
> We virtualised Xen itself :)

Groan. Can we please agree on *one* hypervisor instead of growing
emulators for all other hypervisors in each of them :)

> Now you have no more excuses for breaking Xen guest mode!

No cookies, you spoilsport! :)

        tglx