crypto: lib/Kconfig - Hide arch options from user

The ARCH_MAY_HAVE patch missed arm64, mips and s390.  But it may
also lead to arch options being enabled but ineffective because
of modular/built-in conflicts.

As the primary user of all these options wireguard is selecting
the arch options anyway, make the same selections at the lib/crypto
option level and hide the arch options from the user.

Instead of selecting them centrally from lib/crypto, simply set
the default of each arch option as suggested by Eric Biggers.

Change the Crypto API generic algorithms to select the top-level
lib/crypto options instead of the generic one as otherwise there
is no way to enable the arch options (Eric Biggers).  Introduce a
set of INTERNAL options to work around dependency cycles on the
CONFIG_CRYPTO symbol.

Fixes: 1047e21aecdf ("crypto: lib/Kconfig - Fix lib built-in failure when arch is modular")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Arnd Bergmann <arnd@kernel.org>
Closes: https://lore.kernel.org/oe-kbuild-all/202502232152.JC84YDLp-lkp@intel.com/
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

7 files changed, 39 insertions, 22 deletions

diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig
index 47d9cc59f254..23e4ea067ddb 100644
--- a/arch/arm/crypto/Kconfig
+++ b/arch/arm/crypto/Kconfig
@@ -3,10 +3,12 @@
 menu "Accelerated Cryptographic Algorithms for CPU (arm)"
 
 config CRYPTO_CURVE25519_NEON
-	tristate "Public key crypto: Curve25519 (NEON)"
+	tristate
 	depends on KERNEL_MODE_NEON
+	select CRYPTO_KPP
 	select CRYPTO_LIB_CURVE25519_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CURVE25519
+	select CRYPTO_ARCH_HAVE_LIB_CURVE25519
+	default CRYPTO_LIB_CURVE25519_INTERNAL
 	help
 	  Curve25519 algorithm
 
@@ -45,9 +47,10 @@ config CRYPTO_NHPOLY1305_NEON
 	  - NEON (Advanced SIMD) extensions
 
 config CRYPTO_POLY1305_ARM
-	tristate "Hash functions: Poly1305 (NEON)"
+	tristate
 	select CRYPTO_HASH
-	select CRYPTO_ARCH_MAY_HAVE_LIB_POLY1305
+	select CRYPTO_ARCH_HAVE_LIB_POLY1305
+	default CRYPTO_LIB_POLY1305_INTERNAL
 	help
 	  Poly1305 authenticator algorithm (RFC7539)
 
@@ -212,9 +215,10 @@ config CRYPTO_AES_ARM_CE
 	  - ARMv8 Crypto Extensions
 
 config CRYPTO_CHACHA20_NEON
-	tristate "Ciphers: ChaCha20, XChaCha20, XChaCha12 (NEON)"
+	tristate
 	select CRYPTO_SKCIPHER
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CHACHA
+	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
 	  stream cipher algorithms
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig
index 5636ab83f22a..3418c8d3c78d 100644
--- a/arch/arm64/crypto/Kconfig
+++ b/arch/arm64/crypto/Kconfig
@@ -26,10 +26,11 @@ config CRYPTO_NHPOLY1305_NEON
 	  - NEON (Advanced SIMD) extensions
 
 config CRYPTO_POLY1305_NEON
-	tristate "Hash functions: Poly1305 (NEON)"
+	tristate
 	depends on KERNEL_MODE_NEON
 	select CRYPTO_HASH
 	select CRYPTO_ARCH_HAVE_LIB_POLY1305
+	default CRYPTO_LIB_POLY1305_INTERNAL
 	help
 	  Poly1305 authenticator algorithm (RFC7539)
 
@@ -186,11 +187,12 @@ config CRYPTO_AES_ARM64_NEON_BLK
 	  - NEON (Advanced SIMD) extensions
 
 config CRYPTO_CHACHA20_NEON
-	tristate "Ciphers: ChaCha (NEON)"
+	tristate
 	depends on KERNEL_MODE_NEON
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
 	  stream cipher algorithms
diff --git a/arch/mips/crypto/Kconfig b/arch/mips/crypto/Kconfig
index 7decd40c4e20..545fc0e12422 100644
--- a/arch/mips/crypto/Kconfig
+++ b/arch/mips/crypto/Kconfig
@@ -3,9 +3,11 @@
 menu "Accelerated Cryptographic Algorithms for CPU (mips)"
 
 config CRYPTO_POLY1305_MIPS
-	tristate "Hash functions: Poly1305"
+	tristate
 	depends on MIPS
+	select CRYPTO_HASH
 	select CRYPTO_ARCH_HAVE_LIB_POLY1305
+	default CRYPTO_LIB_POLY1305_INTERNAL
 	help
 	  Poly1305 authenticator algorithm (RFC7539)
 
@@ -52,10 +54,11 @@ config CRYPTO_SHA512_OCTEON
 	  Architecture: mips OCTEON using crypto instructions, when available
 
 config CRYPTO_CHACHA_MIPS
-	tristate "Ciphers: ChaCha20, XChaCha20, XChaCha12 (MIPS32r2)"
+	tristate
 	depends on CPU_MIPS32_R2
 	select CRYPTO_SKCIPHER
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
 	  stream cipher algorithms
diff --git a/arch/powerpc/crypto/Kconfig b/arch/powerpc/crypto/Kconfig
index e453cb0c82d2..370db8192ce6 100644
--- a/arch/powerpc/crypto/Kconfig
+++ b/arch/powerpc/crypto/Kconfig
@@ -3,10 +3,12 @@
 menu "Accelerated Cryptographic Algorithms for CPU (powerpc)"
 
 config CRYPTO_CURVE25519_PPC64
-	tristate "Public key crypto: Curve25519 (PowerPC64)"
+	tristate
 	depends on PPC64 && CPU_LITTLE_ENDIAN
+	select CRYPTO_KPP
 	select CRYPTO_LIB_CURVE25519_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CURVE25519
+	select CRYPTO_ARCH_HAVE_LIB_CURVE25519
+	default CRYPTO_LIB_CURVE25519_INTERNAL
 	help
 	  Curve25519 algorithm
 
@@ -91,11 +93,12 @@ config CRYPTO_AES_GCM_P10
 	  later CPU. This module supports stitched acceleration for AES/GCM.
 
 config CRYPTO_CHACHA20_P10
-	tristate "Ciphers: ChaCha20, XChacha20, XChacha12 (P10 or later)"
+	tristate
 	depends on PPC64 && CPU_LITTLE_ENDIAN && VSX
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_CHACHA_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CHACHA
+	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
 	  stream cipher algorithms
diff --git a/arch/riscv/crypto/Kconfig b/arch/riscv/crypto/Kconfig
index ad58dad9a580..c67095a3d669 100644
--- a/arch/riscv/crypto/Kconfig
+++ b/arch/riscv/crypto/Kconfig
@@ -22,7 +22,6 @@ config CRYPTO_CHACHA_RISCV64
 	tristate "Ciphers: ChaCha"
 	depends on 64BIT && RISCV_ISA_V && TOOLCHAIN_HAS_VECTOR_CRYPTO
 	select CRYPTO_SKCIPHER
-	select CRYPTO_LIB_CHACHA_GENERIC
 	help
 	  Length-preserving ciphers: ChaCha20 stream cipher algorithm
 
diff --git a/arch/s390/crypto/Kconfig b/arch/s390/crypto/Kconfig
index b760232537f1..8c4db8b64fa2 100644
--- a/arch/s390/crypto/Kconfig
+++ b/arch/s390/crypto/Kconfig
@@ -108,11 +108,12 @@ config CRYPTO_DES_S390
 	  As of z196 the CTR mode is hardware accelerated.
 
 config CRYPTO_CHACHA_S390
-	tristate "Ciphers: ChaCha20"
+	tristate
 	depends on S390
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving cipher: ChaCha20 stream cipher (RFC 7539)
 
diff --git a/arch/x86/crypto/Kconfig b/arch/x86/crypto/Kconfig
index c189dad0969b..3d948f10c94c 100644
--- a/arch/x86/crypto/Kconfig
+++ b/arch/x86/crypto/Kconfig
@@ -3,10 +3,12 @@
 menu "Accelerated Cryptographic Algorithms for CPU (x86)"
 
 config CRYPTO_CURVE25519_X86
-	tristate "Public key crypto: Curve25519 (ADX)"
+	tristate
 	depends on X86 && 64BIT
+	select CRYPTO_KPP
 	select CRYPTO_LIB_CURVE25519_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CURVE25519
+	select CRYPTO_ARCH_HAVE_LIB_CURVE25519
+	default CRYPTO_LIB_CURVE25519_INTERNAL
 	help
 	  Curve25519 algorithm
 
@@ -348,11 +350,12 @@ config CRYPTO_ARIA_GFNI_AVX512_X86_64
 	  Processes 64 blocks in parallel.
 
 config CRYPTO_CHACHA20_X86_64
-	tristate "Ciphers: ChaCha20, XChaCha20, XChaCha12 (SSSE3/AVX2/AVX-512VL)"
+	tristate
 	depends on X86 && 64BIT
 	select CRYPTO_SKCIPHER
 	select CRYPTO_LIB_CHACHA_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_CHACHA
+	select CRYPTO_ARCH_HAVE_LIB_CHACHA
+	default CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Length-preserving ciphers: ChaCha20, XChaCha20, and XChaCha12
 	  stream cipher algorithms
@@ -417,10 +420,12 @@ config CRYPTO_POLYVAL_CLMUL_NI
 	  - CLMUL-NI (carry-less multiplication new instructions)
 
 config CRYPTO_POLY1305_X86_64
-	tristate "Hash functions: Poly1305 (SSE2/AVX2)"
+	tristate
 	depends on X86 && 64BIT
+	select CRYPTO_HASH
 	select CRYPTO_LIB_POLY1305_GENERIC
-	select CRYPTO_ARCH_MAY_HAVE_LIB_POLY1305
+	select CRYPTO_ARCH_HAVE_LIB_POLY1305
+	default CRYPTO_LIB_POLY1305_INTERNAL
 	help
 	  Poly1305 authenticator algorithm (RFC7539)