diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2023-07-12 18:21:19 +0000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-09-15 13:57:00 +0000 |
| commit | 055c99015a4ec3c608d0260592368adc604429ea (patch) | |
| tree | 1197b4557f544c172508fee58e497540ed0ecd58 /host | |
| parent | d6493dbb46b4b7be13a39425b5a1e523e72f5a68 (diff) | |
host/include/aarch64: Implement clmul.h
Detect PMULL in cpuinfo; implement the accel hook.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'host')
| -rw-r--r-- | host/include/aarch64/host/cpuinfo.h | 1 | ||||
| -rw-r--r-- | host/include/aarch64/host/crypto/clmul.h | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/host/include/aarch64/host/cpuinfo.h b/host/include/aarch64/host/cpuinfo.h index 769626b098..fe8c3b3fd1 100644 --- a/host/include/aarch64/host/cpuinfo.h +++ b/host/include/aarch64/host/cpuinfo.h @@ -10,6 +10,7 @@ #define CPUINFO_LSE (1u << 1) #define CPUINFO_LSE2 (1u << 2) #define CPUINFO_AES (1u << 3) +#define CPUINFO_PMULL (1u << 4) /* Initialized with a constructor. */ extern unsigned cpuinfo; diff --git a/host/include/aarch64/host/crypto/clmul.h b/host/include/aarch64/host/crypto/clmul.h new file mode 100644 index 0000000000..bb516d8b2f --- /dev/null +++ b/host/include/aarch64/host/crypto/clmul.h @@ -0,0 +1,41 @@ +/* + * AArch64 specific clmul acceleration. + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef AARCH64_HOST_CRYPTO_CLMUL_H +#define AARCH64_HOST_CRYPTO_CLMUL_H + +#include "host/cpuinfo.h" +#include <arm_neon.h> + +/* + * 64x64->128 pmull is available with FEAT_PMULL. + * Both FEAT_AES and FEAT_PMULL are covered under the same macro. + */ +#ifdef __ARM_FEATURE_AES +# define HAVE_CLMUL_ACCEL true +#else +# define HAVE_CLMUL_ACCEL likely(cpuinfo & CPUINFO_PMULL) +#endif +#if !defined(__ARM_FEATURE_AES) && defined(CONFIG_ARM_AES_BUILTIN) +# define ATTR_CLMUL_ACCEL __attribute__((target("+crypto"))) +#else +# define ATTR_CLMUL_ACCEL +#endif + +static inline Int128 ATTR_CLMUL_ACCEL +clmul_64_accel(uint64_t n, uint64_t m) +{ + union { poly128_t v; Int128 s; } u; + +#ifdef CONFIG_ARM_AES_BUILTIN + u.v = vmull_p64((poly64_t)n, (poly64_t)m); +#else + asm(".arch_extension aes\n\t" + "pmull %0.1q, %1.1d, %2.1d" : "=w"(u.v) : "w"(n), "w"(m)); +#endif + return u.s; +} + +#endif /* AARCH64_HOST_CRYPTO_CLMUL_H */ |