Re: [libvirt] [PATCH 1/2] conf: add crash to hyperv features

On Mon, Oct 26, 2015 at 13:23:32 +0300, Dmitry Andreev wrote:

Add crash CPU feature for Hyper-V. Hyper-V crash MSR's can be used by Hyper-V based guests to notify about occurred guest crash.

XML: <features> <hyperv> <crash state='on'/> </hyperv> </features>

Sounds like this is related to an existing panic device we already support. So what does enabling hv_crash do in QEMU? Is it an additional channel to a panic device or is the panic device still needed even if hv_crash is enabled? In any case, I think we should map this somehow to the panic device instead of copying 1:1 the way QEMU enables hv_crash. Just to make it clear, NACK until the design is sorted out. Jirka