Re: [PATCH] qemuboot.conf: make cpus match built artifacts

["Aníbal Limón" <anibal.limon@linux.intel.com>]

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Hi Martin,

It looks that we need to improve the alignment between compiler flags
and runqemu configurations. I don't know if is the right way to change
the cpu's to pentium and core2due may be could cause side-effects.

I think will be better to review the qemuboot profiles and to provide a
mechanism to modify it.

I want to know, what was your build settings?

Finally this patch needs to be send to oe-core mailing list.

Best regards,
Anibal

On 04/21/2017 07:21 PM, Martin Kelly wrote:
> Currently, the qemu CPUs for are specified as generic, but the built
> artifacts are not. For example, we build x86-64 artifacts targeting
> core2duo but run them in qemu with generic qemu/kvm CPUs. This causes
> some packages that take advantage of the host architecture to crash
> because they try to use CPU features not advertised by qemu. As an
> example, Qt uses ssse3. When artifacts linked against Qt and built
> targeting core2duo attempt to run on a generic qemu/kvm CPU, we get
> the following crash:
> 
> Incompatible processor. This Qt build requires the following features:
>      ssse3
> 
> We could fix this by making packages like Qt not take advantage of CPU
> features. However, we will probably keep facing similar issues over
> time, so it's better to resolve them in a more enduring way.
> 
> Fix this by making the qemu -cpu arguments match the built artifacts.
> 
> Signed-off-by: Martin Kelly <mkelly@xevo.com>
> ---
>  meta/conf/machine/include/qemuboot-x86.inc | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/meta/conf/machine/include/qemuboot-x86.inc b/meta/conf/machine/include/qemuboot-x86.inc
> index 06ac983..acd03a1 100644
> --- a/meta/conf/machine/include/qemuboot-x86.inc
> +++ b/meta/conf/machine/include/qemuboot-x86.inc
> @@ -1,12 +1,12 @@
>  # For runqemu
>  IMAGE_CLASSES += "qemuboot"
>  QB_SYSTEM_NAME_x86 = "qemu-system-i386"
> -QB_CPU_x86 = "-cpu qemu32"
> -QB_CPU_KVM_x86 = "-cpu kvm32"
> +QB_CPU_x86 = "-cpu pentium2"
> +QB_CPU_KVM_x86 = "-cpu pentium2"
>  
>  QB_SYSTEM_NAME_x86-64 = "qemu-system-x86_64"
>  QB_CPU_x86-64 = "-cpu core2duo"
> -QB_CPU_KVM_x86-64 = "-cpu kvm64"
> +QB_CPU_KVM_x86-64 = "-cpu core2duo"
>  
>  QB_AUDIO_DRV = "alsa"
>  QB_AUDIO_OPT = "-soundhw ac97,es1370"
> 


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