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Re: [Qemu-devel] [PATCH v6 0/12] HyperV equivalent of pvpanic driver
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v6 0/12] HyperV equivalent of pvpanic driver |
Date: |
Tue, 7 Jul 2015 12:20:55 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
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 <address@hidden>
> 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 <address@hidden>
> Signed-off-by: Denis V. Lunev <address@hidden>
> CC: Gleb Natapov <address@hidden>
> CC: Paolo Bonzini <address@hidden>
>
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
- [Qemu-devel] [PATCH 10/12] kvm: Add kvm system event crash handler, (continued)
- [Qemu-devel] [PATCH 10/12] kvm: Add kvm system event crash handler, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 8/12] kvm/x86: add sending hyper-v crash notification to user space, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 4/12] kvm/x86: added hyper-v crash msrs into kvm hyperv context, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 09/12] Added generic panic handler qemu_system_guest_panicked(), Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 7/12] kvm/x86: added hyper-v crash data and ctl msr's get/set'ers, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 1/12] kvm/x86: move Hyper-V MSR's/hypercall code into hyperv.c file, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 11/12] cpu: Add crash_occurred flag into CPUState, Denis V. Lunev, 2015/07/03
- [Qemu-devel] [PATCH 12/12] i386/kvm: Hyper-v crash msrs set/get'ers and migration, Denis V. Lunev, 2015/07/03
- Re: [Qemu-devel] [PATCH v6 0/12] HyperV equivalent of pvpanic driver,
Paolo Bonzini <=