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Re: meson, NEED_CPU_H, CONFIG_TCG and tests/

From: Claudio Fontana
Subject: Re: meson, NEED_CPU_H, CONFIG_TCG and tests/
Date: Fri, 19 Feb 2021 14:13:33 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0

On 2/19/21 2:04 PM, Claudio Fontana wrote:
> Hi Paolo,
> currently we have use of CONFIG_TCG in tests/,
> but is that variable available at all in there?
> I have to adapt some qemu/tests/qtest/* to work also without tcg for ARM,
> but I think I am not seeing CONFIG_TCG filtering through, and I wonder 
> whether all the checks in there are actually "wrong".
> Looking at meson.build it would seem to me that only stuff in target/ would 
> be able to see CONFIG_TCG,
> as a result of
> foreach target : target_dirs
>   config_target = config_target_mak[target]
>   target_name = config_target['TARGET_NAME']
>   arch = config_target['TARGET_BASE_ARCH']
>   arch_srcs = [config_target_h[target]]
>   arch_deps = []
>   c_args = ['-DNEED_CPU_H',
>             '-DCONFIG_TARGET="@0@-config-target.h"'.format(target),
>             '-DCONFIG_DEVICES="@0@-config-devices.h"'.format(target)]
> But how could tests see this?
> Thanks,
> Claudio

By the way, I think Alex is working around this in the TCG tests in the 

-include ../../../config-host.mak
-include ../config-$(TARGET).mak


In my view we need some solution for at least:


which need to behave differently according to whether TCG is available or not 

For the specific case at hand that I encountered, reopening the issue, 

I need to make tests/qtest/boot-serial-test.c pass different cpu options for 
TCG and KVM,
ie "cortex-a57" for TCG, and "host" for KVM.




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