linux-kernel - ARM Juno r1 + CONFIG_PROVE

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Message-ID: <33a83dce-e9f0-7814-923b-763d33e70257@samsung.com>
Date:   Fri, 11 Oct 2019 11:26:04 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Liviu Dudau <liviu.dudau@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Subject: ARM Juno r1 + CONFIG_PROVE_LOCKING=y => boot failure

Hi

Recently I've got access to ARM Juno R1 board and did some tests with 
current mainline kernel on it. I'm a bit surprised that enabling 
CONFIG_PROVE_LOCKING causes a boot failure on this board. After enabling 
this Kconfig option, I get no single message from the kernel, although I 
have earlycon enabled.

I've did my test with default defconfig and current linux-next, 
v5.4-rc1, v5.3 and v4.19. In all cases the result is the same. I'm 
booting kernel using a precompiled uboot from Linaro release and TFTP 
download.

Is this a known issue? Other ARM64 boards I have access to (Samsung TM2e 
and RaspberryPi3) boots fine with the same kernel image.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland