lib/crypto: arm: Move arch/arm/lib/crypto/ into lib/crypto/

Move the contents of arch/arm/lib/crypto/ into lib/crypto/arm/.

The new code organization makes a lot more sense for how this code
actually works and is developed.  In particular, it makes it possible to
build each algorithm as a single module, with better inlining and dead
code elimination.  For a more detailed explanation, see the patchset
which did this for the CRC library code:
https://lore.kernel.org/r/20250607200454.73587-1-ebiggers@kernel.org/.
Also see the patchset which did this for SHA-512:
https://lore.kernel.org/linux-crypto/20250616014019.415791-1-ebiggers@kernel.org/

This is just a preparatory commit, which does the move to get the files
into their new location but keeps them building the same way as before.
Later commits will make the actual improvements to the way the
arch-optimized code is integrated for each algorithm.

Add a gitignore entry for the removed directory arch/arm/lib/crypto/ so
that people don't accidentally commit leftover generated files.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://lore.kernel.org/r/20250619191908.134235-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

18 files changed, 9 insertions, 6 deletions

diff --git a/arch/arm/lib/.gitignore b/arch/arm/lib/.gitignore
new file mode 100644
index 000000000000..647d7a922e68
--- /dev/null
+++ b/arch/arm/lib/.gitignore
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# This now-removed directory used to contain generated files.
+/crypto/
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 91ea0e29107a..d05dd672bcd9 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -5,8 +5,6 @@
 # Copyright (C) 1995-2000 Russell King
 #
 
-obj-y += crypto/
-
 lib-y		:= changebit.o csumipv6.o csumpartial.o               \
 		   csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
 		   delay.o delay-loop.o findbit.o memchr.o memcpy.o   \
diff --git a/arch/arm/lib/crypto/.gitignore b/arch/arm/lib/crypto/.gitignore
deleted file mode 100644
index 12d74d8b03d0..000000000000
--- a/arch/arm/lib/crypto/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-poly1305-core.S
-sha256-core.S
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index dce127a69f13..e14bef8e87af 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -190,7 +190,7 @@ config CRYPTO_LIB_SM3
 
 if !KMSAN # avoid false positives from assembly
 if ARM
-source "arch/arm/lib/crypto/Kconfig"
+source "lib/crypto/arm/Kconfig"
 endif
 if ARM64
 source "arch/arm64/lib/crypto/Kconfig"
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index aaf445a85384..5f2b81f82a85 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -106,3 +106,5 @@ obj-$(CONFIG_CRYPTO_SELFTESTS_FULL)		+= simd.o
 
 obj-$(CONFIG_CRYPTO_LIB_SM3)			+= libsm3.o
 libsm3-y					:= sm3.o
+
+obj-$(CONFIG_ARM) += arm/
diff --git a/lib/crypto/arm/.gitignore b/lib/crypto/arm/.gitignore
index 670a4d97b568..f6c4e8ef80da 100644
--- a/lib/crypto/arm/.gitignore
+++ b/lib/crypto/arm/.gitignore
@@ -1,2 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
+poly1305-core.S
+sha256-core.S
 sha512-core.S
diff --git a/arch/arm/lib/crypto/Kconfig b/lib/crypto/arm/Kconfig
index d1ad664f0c67..d1ad664f0c67 100644
--- a/arch/arm/lib/crypto/Kconfig
+++ b/lib/crypto/arm/Kconfig
diff --git a/arch/arm/lib/crypto/Makefile b/lib/crypto/arm/Makefile
index 431f77c3ff6f..431f77c3ff6f 100644
--- a/arch/arm/lib/crypto/Makefile
+++ b/lib/crypto/arm/Makefile
diff --git a/arch/arm/lib/crypto/blake2s-core.S b/lib/crypto/arm/blake2s-core.S
index df40e46601f1..df40e46601f1 100644
--- a/arch/arm/lib/crypto/blake2s-core.S
+++ b/lib/crypto/arm/blake2s-core.S
diff --git a/arch/arm/lib/crypto/blake2s-glue.c b/lib/crypto/arm/blake2s-glue.c
index 0238a70d9581..0238a70d9581 100644
--- a/arch/arm/lib/crypto/blake2s-glue.c
+++ b/lib/crypto/arm/blake2s-glue.c
diff --git a/arch/arm/lib/crypto/chacha-glue.c b/lib/crypto/arm/chacha-glue.c
index 88ec96415283..88ec96415283 100644
--- a/arch/arm/lib/crypto/chacha-glue.c
+++ b/lib/crypto/arm/chacha-glue.c
diff --git a/arch/arm/lib/crypto/chacha-neon-core.S b/lib/crypto/arm/chacha-neon-core.S
index ddd62b6294a5..ddd62b6294a5 100644
--- a/arch/arm/lib/crypto/chacha-neon-core.S
+++ b/lib/crypto/arm/chacha-neon-core.S
diff --git a/arch/arm/lib/crypto/chacha-scalar-core.S b/lib/crypto/arm/chacha-scalar-core.S
index 4951df05c158..4951df05c158 100644
--- a/arch/arm/lib/crypto/chacha-scalar-core.S
+++ b/lib/crypto/arm/chacha-scalar-core.S
diff --git a/arch/arm/lib/crypto/poly1305-armv4.pl b/lib/crypto/arm/poly1305-armv4.pl
index d57c6e2fc84a..d57c6e2fc84a 100644
--- a/arch/arm/lib/crypto/poly1305-armv4.pl
+++ b/lib/crypto/arm/poly1305-armv4.pl
diff --git a/arch/arm/lib/crypto/poly1305-glue.c b/lib/crypto/arm/poly1305-glue.c
index 2603b0771f2c..2603b0771f2c 100644
--- a/arch/arm/lib/crypto/poly1305-glue.c
+++ b/lib/crypto/arm/poly1305-glue.c
diff --git a/arch/arm/lib/crypto/sha256-armv4.pl b/lib/crypto/arm/sha256-armv4.pl
index 8122db7fd599..8122db7fd599 100644
--- a/arch/arm/lib/crypto/sha256-armv4.pl
+++ b/lib/crypto/arm/sha256-armv4.pl
diff --git a/arch/arm/lib/crypto/sha256-ce.S b/lib/crypto/arm/sha256-ce.S
index ac2c9b01b22d..ac2c9b01b22d 100644
--- a/arch/arm/lib/crypto/sha256-ce.S
+++ b/lib/crypto/arm/sha256-ce.S
diff --git a/arch/arm/lib/crypto/sha256.c b/lib/crypto/arm/sha256.c
index 109192e54b0f..109192e54b0f 100644
--- a/arch/arm/lib/crypto/sha256.c
+++ b/lib/crypto/arm/sha256.c