Messages in this thread |  | | From | "Jason A. Donenfeld" <> | Date | Wed, 26 Sep 2018 17:49:55 +0200 | Subject | Re: [PATCH net-next v6 07/23] zinc: ChaCha20 ARM and ARM64 implementations |
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On Wed, Sep 26, 2018 at 5:45 PM Jason A. Donenfeld <Jason@zx2c4.com> wrote: > So what you have in mind is something like calling simd_relax() every > 4096 bytes or so?
That was actually pretty easy, putting together both of your suggestions:
static inline bool chacha20_arch(struct chacha20_ctx *state, u8 *dst, u8 *src, size_t len, simd_context_t *simd_context) { while (len > PAGE_SIZE) { chacha20_arch(state, dst, src, PAGE_SIZE, simd_context); len -= PAGE_SIZE; src += PAGE_SIZE; dst += PAGE_SIZE; simd_relax(simd_context); } if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && chacha20_use_neon && len >= CHACHA20_BLOCK_SIZE * 3 && simd_use(simd_context)) chacha20_neon(dst, src, len, state->key, state->counter); else chacha20_arm(dst, src, len, state->key, state->counter);
state->counter[0] += (len + 63) / 64; return true; }
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