Does Arago support neon coprocessor?

Hi,

what compiler do you use, and what command you use to compile?

BR,
Georgi

Arago i,e arm-linux-gnueabihf-gcc. The command to compile is "make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-". I even tried with -mfpu=neon with make.

Try to add EXTRA_AFLAGS=-mfpu=neon to your make command line.

Try to use cross_compiler from Sitara SDK.

BR,

Georgi

In arch/arm/vfp/vfpmodule.c there is a function kernel_neon_begin(). Can I call it to enable neon?

Yes,

refer here:
www.kernel.org/.../kernel_mode_neon.txt

"the function kernel_neon_begin(), which
should be called before any kernel mode NEON or VFP instructions are issued.
Likewise, the NEON/VFP unit should be disabled again after use to make sure user
mode will hit the lazy restore trap upon next use. This is handled by the
function kernel_neon_end()."

Also, pay attention on kernel build option "KERNEL_MODE_NEON" to be enabled:
Floating point emulation-> VFP-format floating point maths (VFP [=y])-> Advanced SIMD (NEON) Extension support (NEON [=y]))

BR,
Georgi

Thank you. That link tells to separate the normal and neon code. I am using neon optimization just for openssl library where I just have to reduce the encryption and decryption time. So, if I build openssl library with relevant flags, is that sufficient?

If I build openssl library with relevant flags, is that sufficient?

for me it depends on openssl libraries source - if it is vectorizable.
You can refer here:
www.openssl.org/.../community.html

BR,
Georgi