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authorJason A. Donenfeld <Jason@zx2c4.com>2019-11-25 11:31:12 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2019-11-27 13:08:49 +0800
commit8394bfec51e0e565556101bcc4e2fe7551104cd8 (patch)
treef6500eacc0aa2e818f39286ee59f3e106a4b6578 /arch/x86
parent4ee812f6143d78d8ba1399671d78c8d78bf2817c (diff)
downloadlinux-8394bfec51e0e565556101bcc4e2fe7551104cd8.tar.bz2
crypto: arch - conditionalize crypto api in arch glue for lib code
For glue code that's used by Zinc, the actual Crypto API functions might not necessarily exist, and don't need to exist either. Before this patch, there are valid build configurations that lead to a unbuildable kernel. This fixes it to conditionalize those symbols on the existence of the proper config entry. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/crypto/blake2s-glue.c6
-rw-r--r--arch/x86/crypto/chacha_glue.c5
-rw-r--r--arch/x86/crypto/curve25519-x86_64.c7
-rw-r--r--arch/x86/crypto/poly1305_glue.c5
4 files changed, 14 insertions, 9 deletions
diff --git a/arch/x86/crypto/blake2s-glue.c b/arch/x86/crypto/blake2s-glue.c
index 4a37ba7cdbe5..1d9ff8a45e1f 100644
--- a/arch/x86/crypto/blake2s-glue.c
+++ b/arch/x86/crypto/blake2s-glue.c
@@ -210,12 +210,14 @@ static int __init blake2s_mod_init(void)
XFEATURE_MASK_AVX512, NULL))
static_branch_enable(&blake2s_use_avx512);
- return crypto_register_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+ return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
+ crypto_register_shashes(blake2s_algs,
+ ARRAY_SIZE(blake2s_algs)) : 0;
}
static void __exit blake2s_mod_exit(void)
{
- if (boot_cpu_has(X86_FEATURE_SSSE3))
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
}
diff --git a/arch/x86/crypto/chacha_glue.c b/arch/x86/crypto/chacha_glue.c
index a94e30b6f941..68a74953efaf 100644
--- a/arch/x86/crypto/chacha_glue.c
+++ b/arch/x86/crypto/chacha_glue.c
@@ -299,12 +299,13 @@ static int __init chacha_simd_mod_init(void)
boot_cpu_has(X86_FEATURE_AVX512BW)) /* kmovq */
static_branch_enable(&chacha_use_avx512vl);
}
- return crypto_register_skciphers(algs, ARRAY_SIZE(algs));
+ return IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER) ?
+ crypto_register_skciphers(algs, ARRAY_SIZE(algs)) : 0;
}
static void __exit chacha_simd_mod_fini(void)
{
- if (boot_cpu_has(X86_FEATURE_SSSE3))
+ if (IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER) && boot_cpu_has(X86_FEATURE_SSSE3))
crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
}
diff --git a/arch/x86/crypto/curve25519-x86_64.c b/arch/x86/crypto/curve25519-x86_64.c
index a52a3fb15727..eec7d2d24239 100644
--- a/arch/x86/crypto/curve25519-x86_64.c
+++ b/arch/x86/crypto/curve25519-x86_64.c
@@ -2457,13 +2457,14 @@ static int __init curve25519_mod_init(void)
static_branch_enable(&curve25519_use_adx);
else
return 0;
- return crypto_register_kpp(&curve25519_alg);
+ return IS_REACHABLE(CONFIG_CRYPTO_KPP) ?
+ crypto_register_kpp(&curve25519_alg) : 0;
}
static void __exit curve25519_mod_exit(void)
{
- if (boot_cpu_has(X86_FEATURE_BMI2) ||
- boot_cpu_has(X86_FEATURE_ADX))
+ if (IS_REACHABLE(CONFIG_CRYPTO_KPP) &&
+ (boot_cpu_has(X86_FEATURE_BMI2) || boot_cpu_has(X86_FEATURE_ADX)))
crypto_unregister_kpp(&curve25519_alg);
}
diff --git a/arch/x86/crypto/poly1305_glue.c b/arch/x86/crypto/poly1305_glue.c
index 370cd88068ec..0cc4537e6617 100644
--- a/arch/x86/crypto/poly1305_glue.c
+++ b/arch/x86/crypto/poly1305_glue.c
@@ -224,12 +224,13 @@ static int __init poly1305_simd_mod_init(void)
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
static_branch_enable(&poly1305_use_avx2);
- return crypto_register_shash(&alg);
+ return IS_REACHABLE(CONFIG_CRYPTO_HASH) ? crypto_register_shash(&alg) : 0;
}
static void __exit poly1305_simd_mod_exit(void)
{
- crypto_unregister_shash(&alg);
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH))
+ crypto_unregister_shash(&alg);
}
module_init(poly1305_simd_mod_init);