Linux 5.8 Tightens ARM 64-Bit Security With BTI, Shadow Call Stack Support

[phoronix]

Phoronix: Linux 5.8 Tightens ARM 64-Bit Security With BTI, Shadow Call Stack Support

The 64-bit ARM (ARM64 / AArch64) architecture changes have already landed into the progressing Linux 5.8 codebase...

http://www.phoronix.com/scan.php?pag...ux-5.8-BTI-SCS

[Raka555]

I wonder how big will the performance hit be for SCS on arm, since it was so bad on x86_64.

Is this always on or an opt in ?