kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 243 deletions

diff --git a/target/linux/generic/backport-5.4/080-wireguard-0057-crypto-arch-lib-limit-simd-usage-to-4k-chunks.patch b/target/linux/generic/backport-5.4/080-wireguard-0057-crypto-arch-lib-limit-simd-usage-to-4k-chunks.patch
deleted file mode 100644
index f8828f243e..0000000000
--- a/target/linux/generic/backport-5.4/080-wireguard-0057-crypto-arch-lib-limit-simd-usage-to-4k-chunks.patch
+++ /dev/null
@@ -1,243 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Thu, 23 Apr 2020 15:54:04 -0600
-Subject: [PATCH] crypto: arch/lib - limit simd usage to 4k chunks
-
-commit 706024a52c614b478b63f7728d202532ce6591a9 upstream.
-
-The initial Zinc patchset, after some mailing list discussion, contained
-code to ensure that kernel_fpu_enable would not be kept on for more than
-a 4k chunk, since it disables preemption. The choice of 4k isn't totally
-scientific, but it's not a bad guess either, and it's what's used in
-both the x86 poly1305, blake2s, and nhpoly1305 code already (in the form
-of PAGE_SIZE, which this commit corrects to be explicitly 4k for the
-former two).
-
-Ard did some back of the envelope calculations and found that
-at 5 cycles/byte (overestimate) on a 1ghz processor (pretty slow), 4k
-means we have a maximum preemption disabling of 20us, which Sebastian
-confirmed was probably a good limit.
-
-Unfortunately the chunking appears to have been left out of the final
-patchset that added the glue code. So, this commit adds it back in.
-
-Fixes: 84e03fa39fbe ("crypto: x86/chacha - expose SIMD ChaCha routine as library function")
-Fixes: b3aad5bad26a ("crypto: arm64/chacha - expose arm64 ChaCha routine as library function")
-Fixes: a44a3430d71b ("crypto: arm/chacha - expose ARM ChaCha routine as library function")
-Fixes: d7d7b8535662 ("crypto: x86/poly1305 - wire up faster implementations for kernel")
-Fixes: f569ca164751 ("crypto: arm64/poly1305 - incorporate OpenSSL/CRYPTOGAMS NEON implementation")
-Fixes: a6b803b3ddc7 ("crypto: arm/poly1305 - incorporate OpenSSL/CRYPTOGAMS NEON implementation")
-Fixes: ed0356eda153 ("crypto: blake2s - x86_64 SIMD implementation")
-Cc: Eric Biggers <ebiggers@google.com>
-Cc: Ard Biesheuvel <ardb@kernel.org>
-Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Cc: stable@vger.kernel.org
-Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
-Reviewed-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/chacha-glue.c        | 14 +++++++++++---
- arch/arm/crypto/poly1305-glue.c      | 15 +++++++++++----
- arch/arm64/crypto/chacha-neon-glue.c | 14 +++++++++++---
- arch/arm64/crypto/poly1305-glue.c    | 15 +++++++++++----
- arch/x86/crypto/blake2s-glue.c       | 10 ++++------
- arch/x86/crypto/chacha_glue.c        | 14 +++++++++++---
- arch/x86/crypto/poly1305_glue.c      | 13 ++++++-------
- 7 files changed, 65 insertions(+), 30 deletions(-)
-
---- a/arch/arm/crypto/chacha-glue.c
-+++ b/arch/arm/crypto/chacha-glue.c
-@@ -91,9 +91,17 @@ void chacha_crypt_arch(u32 *state, u8 *d
- 		return;
- 	}
- 
--	kernel_neon_begin();
--	chacha_doneon(state, dst, src, bytes, nrounds);
--	kernel_neon_end();
-+	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);
- 
---- a/arch/arm/crypto/poly1305-glue.c
-+++ b/arch/arm/crypto/poly1305-glue.c
-@@ -160,13 +160,20 @@ void poly1305_update_arch(struct poly130
- 		unsigned int len = round_down(nbytes, POLY1305_BLOCK_SIZE);
- 
- 		if (static_branch_likely(&have_neon) && do_neon) {
--			kernel_neon_begin();
--			poly1305_blocks_neon(&dctx->h, src, len, 1);
--			kernel_neon_end();
-+			do {
-+				unsigned int todo = min_t(unsigned int, len, SZ_4K);
-+
-+				kernel_neon_begin();
-+				poly1305_blocks_neon(&dctx->h, src, todo, 1);
-+				kernel_neon_end();
-+
-+				len -= todo;
-+				src += todo;
-+			} while (len);
- 		} else {
- 			poly1305_blocks_arm(&dctx->h, src, len, 1);
-+			src += len;
- 		}
--		src += len;
- 		nbytes %= POLY1305_BLOCK_SIZE;
- 	}
- 
---- a/arch/arm64/crypto/chacha-neon-glue.c
-+++ b/arch/arm64/crypto/chacha-neon-glue.c
-@@ -87,9 +87,17 @@ void chacha_crypt_arch(u32 *state, u8 *d
- 	    !crypto_simd_usable())
- 		return chacha_crypt_generic(state, dst, src, bytes, nrounds);
- 
--	kernel_neon_begin();
--	chacha_doneon(state, dst, src, bytes, nrounds);
--	kernel_neon_end();
-+	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);
- 
---- a/arch/arm64/crypto/poly1305-glue.c
-+++ b/arch/arm64/crypto/poly1305-glue.c
-@@ -143,13 +143,20 @@ void poly1305_update_arch(struct poly130
- 		unsigned int len = round_down(nbytes, POLY1305_BLOCK_SIZE);
- 
- 		if (static_branch_likely(&have_neon) && crypto_simd_usable()) {
--			kernel_neon_begin();
--			poly1305_blocks_neon(&dctx->h, src, len, 1);
--			kernel_neon_end();
-+			do {
-+				unsigned int todo = min_t(unsigned int, len, SZ_4K);
-+
-+				kernel_neon_begin();
-+				poly1305_blocks_neon(&dctx->h, src, todo, 1);
-+				kernel_neon_end();
-+
-+				len -= todo;
-+				src += todo;
-+			} while (len);
- 		} else {
- 			poly1305_blocks(&dctx->h, src, len, 1);
-+			src += len;
- 		}
--		src += len;
- 		nbytes %= POLY1305_BLOCK_SIZE;
- 	}
- 
---- a/arch/x86/crypto/blake2s-glue.c
-+++ b/arch/x86/crypto/blake2s-glue.c
-@@ -32,16 +32,16 @@ void blake2s_compress_arch(struct blake2
- 			   const u32 inc)
- {
- 	/* SIMD disables preemption, so relax after processing each page. */
--	BUILD_BUG_ON(PAGE_SIZE / BLAKE2S_BLOCK_SIZE < 8);
-+	BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
- 
- 	if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) {
- 		blake2s_compress_generic(state, block, nblocks, inc);
- 		return;
- 	}
- 
--	for (;;) {
-+	do {
- 		const size_t blocks = min_t(size_t, nblocks,
--					    PAGE_SIZE / BLAKE2S_BLOCK_SIZE);
-+					    SZ_4K / BLAKE2S_BLOCK_SIZE);
- 
- 		kernel_fpu_begin();
- 		if (IS_ENABLED(CONFIG_AS_AVX512) &&
-@@ -52,10 +52,8 @@ void blake2s_compress_arch(struct blake2
- 		kernel_fpu_end();
- 
- 		nblocks -= blocks;
--		if (!nblocks)
--			break;
- 		block += blocks * BLAKE2S_BLOCK_SIZE;
--	}
-+	} while (nblocks);
- }
- EXPORT_SYMBOL(blake2s_compress_arch);
- 
---- a/arch/x86/crypto/chacha_glue.c
-+++ b/arch/x86/crypto/chacha_glue.c
-@@ -154,9 +154,17 @@ void chacha_crypt_arch(u32 *state, u8 *d
- 	    bytes <= CHACHA_BLOCK_SIZE)
- 		return chacha_crypt_generic(state, dst, src, bytes, nrounds);
- 
--	kernel_fpu_begin();
--	chacha_dosimd(state, dst, src, bytes, nrounds);
--	kernel_fpu_end();
-+	do {
-+		unsigned int todo = min_t(unsigned int, bytes, SZ_4K);
-+
-+		kernel_fpu_begin();
-+		chacha_dosimd(state, dst, src, todo, nrounds);
-+		kernel_fpu_end();
-+
-+		bytes -= todo;
-+		src += todo;
-+		dst += todo;
-+	} while (bytes);
- }
- EXPORT_SYMBOL(chacha_crypt_arch);
- 
---- a/arch/x86/crypto/poly1305_glue.c
-+++ b/arch/x86/crypto/poly1305_glue.c
-@@ -91,8 +91,8 @@ static void poly1305_simd_blocks(void *c
- 	struct poly1305_arch_internal *state = ctx;
- 
- 	/* SIMD disables preemption, so relax after processing each page. */
--	BUILD_BUG_ON(PAGE_SIZE < POLY1305_BLOCK_SIZE ||
--		     PAGE_SIZE % POLY1305_BLOCK_SIZE);
-+	BUILD_BUG_ON(SZ_4K < POLY1305_BLOCK_SIZE ||
-+		     SZ_4K % POLY1305_BLOCK_SIZE);
- 
- 	if (!IS_ENABLED(CONFIG_AS_AVX) || !static_branch_likely(&poly1305_use_avx) ||
- 	    (len < (POLY1305_BLOCK_SIZE * 18) && !state->is_base2_26) ||
-@@ -102,8 +102,8 @@ static void poly1305_simd_blocks(void *c
- 		return;
- 	}
- 
--	for (;;) {
--		const size_t bytes = min_t(size_t, len, PAGE_SIZE);
-+	do {
-+		const size_t bytes = min_t(size_t, len, SZ_4K);
- 
- 		kernel_fpu_begin();
- 		if (IS_ENABLED(CONFIG_AS_AVX512) && static_branch_likely(&poly1305_use_avx512))
-@@ -113,11 +113,10 @@ static void poly1305_simd_blocks(void *c
- 		else
- 			poly1305_blocks_avx(ctx, inp, bytes, padbit);
- 		kernel_fpu_end();
-+
- 		len -= bytes;
--		if (!len)
--			break;
- 		inp += bytes;
--	}
-+	} while (len);
- }
- 
- static void poly1305_simd_emit(void *ctx, u8 mac[POLY1305_DIGEST_SIZE],