[PATCH 2/2] crypto: arm - add build time test for CRC instruction support

[Jon Hunter]

On 28/02/17 14:36, Ard Biesheuvel wrote:
> The accelerated CRC32 module for ARM may use either the scalar CRC32
> instructions, the NEON 64x64 to 128 bit polynomial multiplication
> (vmull.p64) instruction, or both, depending on what the current CPU
> supports.
> 
> However, this also requires support in binutils, and as it turns out,
> versions of binutils exist that support the vmull.p64 instruction but
> not the crc32 instructions.
> 
> So refactor the Makefile logic so that this module only gets built if
> binutils has support for both.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

Thanks!

Acked-by: Jon Hunter <jonathanh at nvidia.com>
Tested-by: Jon Hunter <jonathanh at nvidia.com>

Cheers
Jon

-- 
nvpublic