Re: [PATCH v3 0/9] HyperV equivalent of pvpanic driver

[Paolo Bonzini <pbonzini@redhat.com>]

On 30/06/2015 13:33, Denis V. Lunev wrote:
> Windows 2012 guests can notify hypervisor about occurred guest crash
> (Windows bugcheck(BSOD)) by writing specific Hyper-V msrs. This patch does
> handling of this MSR's by KVM and sending notification to user space that
> allows to gather Windows guest crash dump by QEMU/LIBVIRT.
> 
> The idea is to provide functionality equal to pvpanic device without
> QEMU guest agent for Windows.
> 
> The idea is borrowed from Linux HyperV bus driver and validated against
> Windows 2k12.
> 
> Changes from v2:
> * forbid modification crash ctl msr by guest
> * qemu_system_guest_panicked usage in pvpanic and s390x
> * hyper-v crash handler move from generic kvm to i386
> * hyper-v crash handler: skip fetching crash msrs just mark crash occured
> * sync with linux-next 20150629
> * patch 11 squashed to patch 10
> * patch 9 squashed to patch 7
> 
> Changes from v1:
> * hyperv code move to hyperv.c
> * added read handlers of crash data msrs
> * added per vm and per cpu hyperv context structures
> * added saving crash msrs inside qemu cpu state
> * added qemu fetch and update of crash msrs
> * added qemu crash msrs store in cpu state and it's migration
> 
> Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> CC: Gleb Natapov <gleb@kernel.org>
> CC: Paolo Bonzini <pbonzini@redhat.com>

The patches look good, thanks.  I'll queue them as soon as I start
merging 4.3 features.

Paolo