Subject: SoCFPGA with CONFIG_THUMB2_KERNEL boot error

From: [email-masked] (Steffen Trumtrar)
Date: Tue, 19 Apr 2016 16:02:20 +0200

Hi!

According to kernelci.org (and validating on my own hardware), the current
socfpga mainline kernel has an issue with CONFIG_THUMB2_KERNEL enabled.

https://storage.kernelci.org/mainline/v4.6-rc4-11-g12566cc35d0e/arm-multi_v7_defconfig/lab-khilman/boot-socfpga_cyclone5_de0_sockit.html

vs

https://storage.kernelci.org/mainline/v4.6-rc4-11-g12566cc35d0e/arm-multi_v7_defconfig+CONFIG_THUMB2_KERNEL=y/lab-khilman/boot-socfpga_cyclone5_de0_sockit.html

Both boot successfully, but notice that the board fails to bring up CPU1 if
thumb2 support is enabled.

Any ideas why this might be happening?

Regards,
Steffen

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