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author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-28 16:06:49 +0200 |
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committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-10-02 03:41:49 +0200 |
commit | 0bdf893c13cdf534911487a533d9cc814b7fa906 (patch) | |
tree | 8c39b533df8aa18bcdba54c7ded8fe0d3c5524e3 /src/compat/compat.h | |
parent | simd: return a bool from simd_relax (diff) | |
download | wireguard-linux-compat-0bdf893c13cdf534911487a533d9cc814b7fa906.tar.xz wireguard-linux-compat-0bdf893c13cdf534911487a533d9cc814b7fa906.zip |
simd: refactor simd availability handling
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/compat/compat.h')
-rw-r--r-- | src/compat/compat.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/compat/compat.h b/src/compat/compat.h index 2e67edb..8c679a1 100644 --- a/src/compat/compat.h +++ b/src/compat/compat.h @@ -737,6 +737,24 @@ static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2, #define read_cpuid_part() read_cpuid_part_number() #endif +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0) || (!defined(CONFIG_X86_64) && !defined(CONFIG_ARM64) && !defined(CONFIG_ARM)) +#if defined(CONFIG_X86_64) +#include <asm/fpu/api.h> +#endif +static __must_check inline bool may_use_simd(void) +{ +#if defined(CONFIG_X86_64) + return irq_fpu_usable(); +#elif defined(CONFIG_ARM64) && defined(CONFIG_KERNEL_MODE_NEON) + return true; +#elif defined(CONFIG_ARM) && defined(CONFIG_KERNEL_MODE_NEON) + return !in_nmi() && !in_irq() && !in_serving_softirq(); +#else + return false; +#endif +} +#endif + /* https://lkml.kernel.org/r/20170624021727.17835-1-Jason@zx2c4.com */ #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/ip.h> |