Re: [PATCH v4 00/21] SError rework + RAS&IESB for firmware first support

Peter Maydell
2017-11-13T17:54:25Z

On 13 November 2017 at 16:14, Andrew Jones <drjones@redhat.com> wrote:
> On Mon, Nov 13, 2017 at 12:29:46PM +0100, Christoffer Dall wrote:
>> I'm thinking this is analogous to migrating a VM that uses an irqchip in
>> userspace and has set the IRQ or FIQ lines using KVM_IRQ_LINE. My
>> feeling is that this is also not supported today.
>
> Luckily userspace irqchip is mostly a debug feature, or just to support
> oddball hardware. Or at least that's the way I see its usecases...

True, but I think we should always insist on migration working
for new features, because it's just an easier line to define;
otherwise we end up with an annoying "feature mostly works,
unless you happened to be using [list of random things], in
which case it silently doesn't" effect.

thanks
-- PMM