# Linux Kernel Module Cheat
The perfect emulation setup to study and develop the <<linux-kernel>> v5.9.2, kernel modules, <<qemu-buildroot-setup,QEMU>>, <<gem5-buildroot-setup,gem5>> and x86_64, ARMv7 and ARMv8 <<userland-assembly,userland>> and <<baremetal-setup,baremetal>> assembly, <<c,ANSI C>>, <<cpp,C++>> and <<posix,POSIX>>. <<gdb>> and <<kgdb>> just work. Powered by <<about-the-qemu-buildroot-setup,Buildroot>> and <<about-the-baremetal-setup,crosstool-NG>>. Highly automated. Thoroughly documented. Automated <<test-this-repo,tests>>.

##### 30.6.2.1. ARMv8 floating point availability

Support is semi-mandatory. ARMv8 architecture reference manual A1.5 "Advanced SIMD and floating-point support":

> ARMv8 can support the following levels of support for Advanced SIMD and floating-point instructions:

> - Full SIMD and floating-point support without exception trapping.

> - Full SIMD and floating-point support with exception trapping.

> - No floating-point or SIMD support. This option is licensed only for implementations targeting specialized markets.

> Note: All systems that support standard operating systems with rich application environments provide hardware support for Advanced SIMD and floating-point. It is a requirement of the ARM Procedure Call Standard for AArch64, see Procedure Call Standard for the ARM 64-bit Architecture.

Therefore it is in theory optional, but highly available.

This is unlike ARMv7, where floating point is completely optional through ARM VFP.