kernel mode neon support?

커널에서 설정하는 neon은..

*** At least one emulation must be selected *** [*] VFP-format floating point maths                 [ ]   Advanced SIMD (NEON) Extension support

커널모드 neon 지원이려나?

도움말에는 간단하게만 써있는데

The Linux kernel configuration item CONFIG_NEON: prompt: Advanced SIMD (NEON) Extension support type: bool depends on: CONFIG_VFPv3 && CONFIG_CPU_V7 defined in arch/arm/Kconfig found in Linux kernels: 2.6.25–2.6.39, 3.0–3.19, 4.0, 4.1-rc+HEAD Help text Say Y to include support code for NEON, the ARMv7 Advanced SIMD Extension. [링크 : http://cateee.net/lkddb/web-lkddb/NEON.html]

비글본 보드 쪽 글이 검색되서 보니...

커널모드 NEON 명령어 지원...?

Re: [beagleboard] Re: How to enable NEON instruction Support in the kernel In the linux omap kernel [assuming you have already done "make ARCH=arm omap3_beagle_defconfig] make ARCH=arm menuconfig Under the "Floating point emulation" Select "Advanced SIMD (NEON) Extension support". Save the configuration and exit. Check in the .config file whether you have "CONFIG_NEON=y" - Jesslyn  [링크 : https://groups.google.com/forum/#!topic/beagleboard/xF1gwRrUvQY]

Changes since v1: - changed the order of the patches, so kernel_neon_begin() does not appear before the required fixes are in place - don't use might_sleep() to enforce that kernel_neon_begin() should not be called from interrupt context, as it also prevents it from being called with preemption disabled, which is perfectly acceptable - prefer inc_preempt_count() over preempt_disable() so sleeping after calling kernel_neon_begin() gets flagged even with kernel preemption disabled in Kconfig - made the RAID6 patch suitable for both arm and arm64 [링크 : https://lwn.net/Articles/556398/]

[링크 : https://www.kernel.org/doc/Documentation/arm/kernel_mode_neon.txt]