Re: [Qemu-devel] [PATCH v6 0/12] HyperV equivalent of pvpanic driver

["Denis V. Lunev" <den@openvz.org>]

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On 07/07/2015 01:20 PM, Paolo Bonzini wrote:
>
> On 03/07/2015 14:01, 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 v5:
>> * added hyperv crash msrs into supported/emulated list
>> * qemu: reset CPUState::crash_occurred at cpu reset
>> * qemu: userspace checks kernel support of hyperv crash msrs
>>    by kvm_get_supported_msrs
>>
>> Changes from v4:
>> * fixed typo in email of Andreas Färber <afaerber@suse.de>
>>    my vim strangely behaves on lines with extended Deutch chars
>>
>> Changes from v3:
>> * remove unused HV_X64_MSR_CRASH_CTL_NOTIFY
>> * added documentation section about KVM_SYSTEM_EVENT_CRASH
>> * allow only supported values inside crash ctl msr
>> * qemu: split patch into generic crash handling patches and hyperv specific
>> * qemu: skip migration of crash ctl msr value
>>
>> 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 occurred
>> * 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>
>>
> I'm queuing patches 1-8 to the KVM tree.  For patch 9-12, I've applied
> them locally but would like Eduardo or Andreas to ack 11 and 12.
>
> Paolo
guys?

we are going to move forward with other HyperV bits.

Den

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