1 files changed, 0 insertions, 138 deletions
diff --git a/arch/arm/lib/crypto/chacha-glue.c b/arch/arm/lib/crypto/chacha-glue.c
deleted file mode 100644
index 88ec96415283..000000000000
--- a/arch/arm/lib/crypto/chacha-glue.c
+++ /dev/null
@@ -1,138 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * ChaCha and HChaCha functions (ARM optimized)
- *
- * Copyright (C) 2016-2019 Linaro, Ltd. <ard.biesheuvel@linaro.org>
- * Copyright (C) 2015 Martin Willi
- */
-
-#include <crypto/chacha.h>
-#include <crypto/internal/simd.h>
-#include <linux/jump_label.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-#include <asm/cputype.h>
-#include <asm/hwcap.h>
-#include <asm/neon.h>
-#include <asm/simd.h>
-
-asmlinkage void chacha_block_xor_neon(const struct chacha_state *state,
-				      u8 *dst, const u8 *src, int nrounds);
-asmlinkage void chacha_4block_xor_neon(const struct chacha_state *state,
-				       u8 *dst, const u8 *src,
-				       int nrounds, unsigned int nbytes);
-asmlinkage void hchacha_block_arm(const struct chacha_state *state,
-				  u32 out[HCHACHA_OUT_WORDS], int nrounds);
-asmlinkage void hchacha_block_neon(const struct chacha_state *state,
-				   u32 out[HCHACHA_OUT_WORDS], int nrounds);
-
-asmlinkage void chacha_doarm(u8 *dst, const u8 *src, unsigned int bytes,
-			     const struct chacha_state *state, int nrounds);
-
-static __ro_after_init DEFINE_STATIC_KEY_FALSE(use_neon);
-
-static inline bool neon_usable(void)
-{
-	return static_branch_likely(&use_neon) && crypto_simd_usable();
-}
-
-static void chacha_doneon(struct chacha_state *state, u8 *dst, const u8 *src,
-			  unsigned int bytes, int nrounds)
-{
-	u8 buf[CHACHA_BLOCK_SIZE];
-
-	while (bytes > CHACHA_BLOCK_SIZE) {
-		unsigned int l = min(bytes, CHACHA_BLOCK_SIZE * 4U);
-
-		chacha_4block_xor_neon(state, dst, src, nrounds, l);
-		bytes -= l;
-		src += l;
-		dst += l;
-		state->x[12] += DIV_ROUND_UP(l, CHACHA_BLOCK_SIZE);
-	}
-	if (bytes) {
-		const u8 *s = src;
-		u8 *d = dst;
-
-		if (bytes != CHACHA_BLOCK_SIZE)
-			s = d = memcpy(buf, src, bytes);
-		chacha_block_xor_neon(state, d, s, nrounds);
-		if (d != dst)
-			memcpy(dst, buf, bytes);
-		state->x[12]++;
-	}
-}
-
-void hchacha_block_arch(const struct chacha_state *state,
-			u32 out[HCHACHA_OUT_WORDS], int nrounds)
-{
-	if (!IS_ENABLED(CONFIG_KERNEL_MODE_NEON) || !neon_usable()) {
-		hchacha_block_arm(state, out, nrounds);
-	} else {
-		kernel_neon_begin();
-		hchacha_block_neon(state, out, nrounds);
-		kernel_neon_end();
-	}
-}
-EXPORT_SYMBOL(hchacha_block_arch);
-
-void chacha_crypt_arch(struct chacha_state *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->x[12] += DIV_ROUND_UP(bytes, CHACHA_BLOCK_SIZE);
-		return;
-	}
-
-	do {
-		unsigned int todo = min_t(unsigned int, bytes, SZ_4K);
-
-		kernel_neon_begin();
-		chacha_doneon(state, dst, src, todo, nrounds);
-		kernel_neon_end();
-
-		bytes -= todo;
-		src += todo;
-		dst += todo;
-	} while (bytes);
-}
-EXPORT_SYMBOL(chacha_crypt_arch);
-
-bool chacha_is_arch_optimized(void)
-{
-	/* We always can use at least the ARM scalar implementation. */
-	return true;
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
-static int __init chacha_arm_mod_init(void)
-{
-	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON)) {
-		switch (read_cpuid_part()) {
-		case ARM_CPU_PART_CORTEX_A7:
-		case ARM_CPU_PART_CORTEX_A5:
-			/*
-			 * The Cortex-A7 and Cortex-A5 do not perform well with
-			 * the NEON implementation but do incredibly with the
-			 * scalar one and use less power.
-			 */
-			break;
-		default:
-			static_branch_enable(&use_neon);
-		}
-	}
-	return 0;
-}
-subsys_initcall(chacha_arm_mod_init);
-
-static void __exit chacha_arm_mod_exit(void)
-{
-}
-module_exit(chacha_arm_mod_exit);
-
-MODULE_DESCRIPTION("ChaCha and HChaCha functions (ARM optimized)");
-MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
-MODULE_LICENSE("GPL v2");