Re: kvm [2087]: load/store instruction decoding not implemented

[Christoffer Dall <christoffer.dall@linaro.org>]

Hi Rich,

On Tue, Feb 24, 2015 at 11:59:35AM +0000, Richard W.M. Jones wrote:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1194366
> 
> Has anyone seen this KVM error?  Or have suggestions how to debug it
> further?
> 
>   kvm [2028]: load/store instruction decoding not implemented

This typically means either (a) you're running an ancient 32-bit guest
or (b) your icache/dcache is poluted and you're executing the wrong
instructions.

> 
> Qemu prints this before crashing:
> 
>   error: kvm run failed Function not implemented
>   (followed by a register dump)
> 
> It happens precisely when the guest loads the crc32-arm64.ko module.
> 
> Both the guest and host kernel are 4.0.0-0.rc1.git0.1.fc23.aarch64
> 
Which hardware is this?  Which distro/rootfs?

Doing anything fancy like device passthrough etc.?  Can you share your
QEMU cmdline?

Thanks,
-Christoffer