Ard Biesheuvel 73c132c15d ARM: add support for kernel mode NEON ... In order to safely support the use of NEON instructions in kernel mode, some precautions need to be taken: - the userland context that may be present in the registers (even if the NEON/VFP is currently disabled) must be stored under the correct task (which may not be 'current' in the UP case), - to avoid having to keep track of additional vfpstates for the kernel side, disallow the use of NEON in interrupt context and run with preemption disabled, - after use, re-enable preemption and re-enable the lazy restore machinery by disabling the NEON/VFP unit. This patch adds the functions kernel_neon_begin() and kernel_neon_end() which take care of the above. It also adds the Kconfig symbol KERNEL_MODE_NEON to enable it. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org>		2013-07-08 22:08:51 +01:00
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Makefile	ARM: vfp: use -mfloat-abi=soft to build vfp	2011-10-01 21:08:55 +02:00
entry.S	ARM: 7729/1: vfp: ensure VFP_arch is non-zero when VFP is not supported	2013-05-22 22:01:37 +01:00
vfp.h	[ARM] 5387/1: Add ptrace VFP support on ARM	2009-02-12 10:59:43 +00:00
vfpdouble.c	[ARM] vfp: fix fuitod/fsitod instructions	2008-01-10 17:07:08 +00:00
vfphw.S	ARM: be strict about FP exceptions in kernel mode	2013-07-08 22:07:38 +01:00
vfpinstr.h	[ARM] 4583/1: ARMv7: Add VFPv3 support	2008-01-26 14:41:28 +00:00
vfpmodule.c	ARM: add support for kernel mode NEON	2013-07-08 22:08:51 +01:00
vfpsingle.c	[ARM] Remove unnecessary asm/ptrace.h from VFP support code	2007-04-22 10:56:40 +01:00