From: Stefan Bader <stefan.bader@canonical.com>
To: Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 13/20] KVM: x86 emulator: fix memory access during x86 emulation
Date: Mon, 08 Mar 2010 15:10:10 +0100 [thread overview]
Message-ID: <4B950542.2030306@canonical.com> (raw)
In-Reply-To: <4B937AF5.5020004@redhat.com>
Avi Kivity wrote:
> On 03/06/2010 03:53 PM, Stefan Bader wrote:
>> i Avi,
>>
>> we currently try to integrate this patch for an update into a 2.6.32
>> based
>> system (amongst other kvm updates). But as soon as this patch gets
>> added kvm
>> will die on startup in kvm_leave_lazy_mmu. This has been documented here:
>>
>> https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/531823
>>
>> I have placed the backports of your patches, which are currently in
>> linux-next
>> and marked for stable here:
>>
>> git://kernel.ubuntu.com/smb/linux-2.6.32.y kvm
>>
>> I have tested the failure with a version that got only the following
>> patches in:
>> KVM: x86 emulator: Add Virtual-8086 mode of emulation
>> KVM: x86 emulator: fix memory access during x86 emulation
>> KVM: x86 emulator: Check IOPL level during io instruction emulation
>> KVM: x86 emulator: Fix popf emulation
>> KVM: x86 emulator: Check CPL level during privilege instruction emulation
>>
>> and also with a version that takes all stable patches up to the bad one:
>> KVM: VMX: Trap and invalid MWAIT/MONITOR instruction
>> KVM: x86 emulator: Add group8 instruction decoding
>> KVM: x86 emulator: Add group9 instruction decoding
>> KVM: x86 emulator: Add Virtual-8086 mode of emulation
>> KVM: x86 emulator: fix memory access during x86 emulation
>>
>> But as soon as the fix for memory access gets added, the bug will
>> occur. Would
>> you have an idea what might be causing this?
>>
>
> Does the same guest, using the same qemu-kvm, work on kvm.git or upstream?
>
The test was done with a kvm user-space package based on 0.12.3 (which seems to
be the current upstream version). I try to do a test on the git version.
Stefan
next prev parent reply other threads:[~2010-03-08 14:10 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-17 13:45 [PATCH 00/20] KVM updates for the 2.6.34 merge window (batch 4/4) Avi Kivity
2010-02-17 13:45 ` [PATCH 01/20] KVM: Fix Codestyle in virt/kvm/coalesced_mmio.c Avi Kivity
2010-02-17 13:45 ` [PATCH 02/20] KVM: MMU: Add tracepoint for guest page aging Avi Kivity
2010-02-17 13:45 ` [PATCH 03/20] KVM: VMX: Rename VMX_EPT_IGMT_BIT to VMX_EPT_IPAT_BIT Avi Kivity
2010-02-17 13:45 ` [PATCH 04/20] KVM: PIT: unregister kvm irq notifier if fail to create pit Avi Kivity
2010-02-17 13:45 ` [PATCH 05/20] KVM: kvm->arch.vioapic should be NULL if kvm_ioapic_init() failure Avi Kivity
2010-02-17 13:45 ` [PATCH 06/20] KVM: cleanup the failure path of KVM_CREATE_IRQCHIP ioctrl Avi Kivity
2010-02-17 13:45 ` [PATCH 07/20] KVM: ia64: destroy ioapic device if fail to setup default irq routing Avi Kivity
2010-02-17 13:45 ` [PATCH 08/20] KVM: ppc/booke: Set ESR and DEAR when inject interrupt to guest Avi Kivity
2010-02-17 13:45 ` [PATCH 09/20] KVM: do not store wqh in irqfd Avi Kivity
2010-02-17 13:45 ` [PATCH 10/20] KVM: x86 emulator: Add group8 instruction decoding Avi Kivity
2010-02-17 13:45 ` [PATCH 11/20] KVM: x86 emulator: Add group9 " Avi Kivity
2010-02-17 13:45 ` [PATCH 12/20] KVM: x86 emulator: Add Virtual-8086 mode of emulation Avi Kivity
2010-02-17 13:45 ` [PATCH 13/20] KVM: x86 emulator: fix memory access during x86 emulation Avi Kivity
2010-03-06 13:53 ` Stefan Bader
2010-03-07 10:07 ` Avi Kivity
2010-03-08 14:10 ` Stefan Bader [this message]
2010-03-08 14:12 ` Avi Kivity
2010-03-08 14:17 ` Stefan Bader
2010-03-08 20:48 ` Stefan Bader
2010-03-09 15:49 ` Stefan Bader
2010-03-11 21:16 ` KVM: x86: ignore access permissions for hypercall patching Marcelo Tosatti
2010-03-11 21:22 ` Stefan Bader
2010-03-12 5:56 ` Gleb Natapov
2010-03-12 6:07 ` Gleb Natapov
2010-02-17 13:45 ` [PATCH 14/20] KVM: x86 emulator: Check IOPL level during io instruction emulation Avi Kivity
2010-02-17 13:45 ` [PATCH 15/20] KVM: x86 emulator: Fix popf emulation Avi Kivity
2010-02-17 13:45 ` [PATCH 16/20] KVM: x86 emulator: Check CPL level during privilege instruction emulation Avi Kivity
2010-02-17 13:45 ` [PATCH 17/20] KVM: x86 emulator: Add LOCK prefix validity checking Avi Kivity
2010-02-17 13:45 ` [PATCH 18/20] KVM: Plan obsolescence of kernel allocated slots, paravirt mmu Avi Kivity
2010-02-17 13:45 ` [PATCH 19/20] KVM: x86 emulator: code style cleanup Avi Kivity
2010-02-17 13:45 ` [PATCH 20/20] KVM: x86 emulator: disallow opcode 82 in 64-bit mode Avi Kivity
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