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 <asmeta...@virtuozzo.com> > Signed-off-by: Denis V. Lunev <d...@openvz.org> > CC: Gleb Natapov <g...@kernel.org> > CC: Paolo Bonzini <pbonz...@redhat.com>
The patches look good, thanks. I'll queue them as soon as I start merging 4.3 features. Paolo
