Re: [PATCH 13/20] KVM: x86 emulator: fix memory access during x86emulation

[Avi Kivity]

On 03/08/2010 04:10 PM, Stefan Bader wrote:
> 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.
>    

I meant keep the same userspace without change, and try it on a Linus 
kernel or kvm.git master 
(http://git.kernel.org/?p=virt/kvm/kvm.git;a=summary).

--
error compiling committee.c: too many arguments to function

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