diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0009-crypto-arm-chacha-expose-ARM-ChaCha-routine-as-libra.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/080-wireguard-0009-crypto-arm-chacha-expose-ARM-ChaCha-routine-as-libra.patch | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0009-crypto-arm-chacha-expose-ARM-ChaCha-routine-as-libra.patch b/target/linux/generic/backport-5.4/080-wireguard-0009-crypto-arm-chacha-expose-ARM-ChaCha-routine-as-libra.patch deleted file mode 100644 index 4006dc63b2..0000000000 --- a/target/linux/generic/backport-5.4/080-wireguard-0009-crypto-arm-chacha-expose-ARM-ChaCha-routine-as-libra.patch +++ /dev/null @@ -1,108 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Ard Biesheuvel <ardb@kernel.org> -Date: Fri, 8 Nov 2019 13:22:15 +0100 -Subject: [PATCH] crypto: arm/chacha - expose ARM ChaCha routine as library - function - -commit a44a3430d71bad4ee56788a59fff099b291ea54c upstream. - -Expose the accelerated NEON ChaCha routine directly as a symbol -export so that users of the ChaCha library API can use it directly. - -Given that calls into the library API will always go through the -routines in this module if it is enabled, switch to static keys -to select the optimal implementation available (which may be none -at all, in which case we defer to the generic implementation for -all invocations). - -Signed-off-by: Ard Biesheuvel <ardb@kernel.org> -Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> -Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> ---- - arch/arm/crypto/Kconfig | 1 + - arch/arm/crypto/chacha-glue.c | 41 ++++++++++++++++++++++++++++++++++- - 2 files changed, 41 insertions(+), 1 deletion(-) - ---- a/arch/arm/crypto/Kconfig -+++ b/arch/arm/crypto/Kconfig -@@ -129,6 +129,7 @@ config CRYPTO_CRC32_ARM_CE - config CRYPTO_CHACHA20_NEON - tristate "NEON and scalar accelerated ChaCha stream cipher algorithms" - select CRYPTO_BLKCIPHER -+ select CRYPTO_ARCH_HAVE_LIB_CHACHA - - config CRYPTO_NHPOLY1305_NEON - tristate "NEON accelerated NHPoly1305 hash function (for Adiantum)" ---- a/arch/arm/crypto/chacha-glue.c -+++ b/arch/arm/crypto/chacha-glue.c -@@ -11,6 +11,7 @@ - #include <crypto/internal/chacha.h> - #include <crypto/internal/simd.h> - #include <crypto/internal/skcipher.h> -+#include <linux/jump_label.h> - #include <linux/kernel.h> - #include <linux/module.h> - -@@ -29,9 +30,11 @@ asmlinkage void hchacha_block_neon(const - asmlinkage void chacha_doarm(u8 *dst, const u8 *src, unsigned int bytes, - const u32 *state, int nrounds); - -+static __ro_after_init DEFINE_STATIC_KEY_FALSE(use_neon); -+ - static inline bool neon_usable(void) - { -- return crypto_simd_usable(); -+ return static_branch_likely(&use_neon) && crypto_simd_usable(); - } - - static void chacha_doneon(u32 *state, u8 *dst, const u8 *src, -@@ -60,6 +63,40 @@ static void chacha_doneon(u32 *state, u8 - } - } - -+void hchacha_block_arch(const u32 *state, u32 *stream, int nrounds) -+{ -+ if (!IS_ENABLED(CONFIG_KERNEL_MODE_NEON) || !neon_usable()) { -+ hchacha_block_arm(state, stream, nrounds); -+ } else { -+ kernel_neon_begin(); -+ hchacha_block_neon(state, stream, nrounds); -+ kernel_neon_end(); -+ } -+} -+EXPORT_SYMBOL(hchacha_block_arch); -+ -+void chacha_init_arch(u32 *state, const u32 *key, const u8 *iv) -+{ -+ chacha_init_generic(state, key, iv); -+} -+EXPORT_SYMBOL(chacha_init_arch); -+ -+void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src, unsigned int bytes, -+ int nrounds) -+{ -+ if (!IS_ENABLED(CONFIG_KERNEL_MODE_NEON) || !neon_usable() || -+ bytes <= CHACHA_BLOCK_SIZE) { -+ chacha_doarm(dst, src, bytes, state, nrounds); -+ state[12] += DIV_ROUND_UP(bytes, CHACHA_BLOCK_SIZE); -+ return; -+ } -+ -+ kernel_neon_begin(); -+ chacha_doneon(state, dst, src, bytes, nrounds); -+ kernel_neon_end(); -+} -+EXPORT_SYMBOL(chacha_crypt_arch); -+ - static int chacha_stream_xor(struct skcipher_request *req, - const struct chacha_ctx *ctx, const u8 *iv, - bool neon) -@@ -269,6 +306,8 @@ static int __init chacha_simd_mod_init(v - for (i = 0; i < ARRAY_SIZE(neon_algs); i++) - neon_algs[i].base.cra_priority = 0; - break; -+ default: -+ static_branch_enable(&use_neon); - } - - err = crypto_register_skciphers(neon_algs, ARRAY_SIZE(neon_algs)); |