From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: kvm [2087]: load/store instruction decoding not implemented
Date: Tue, 24 Feb 2015 13:16:05 +0100
Message-ID: <20150224121605.GA21364@cbox>
References: <20150224115935.GA26241@redhat.com>
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To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: kvmarm@lists.cs.columbia.edu
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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