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openwrt/target/linux/generic/backport-5.4/080-wireguard-0037-crypto-arch-conditionalize-crypto-api-in-arch-glue-f.patch
Jason A. Donenfeld c0cb86e1d5 kernel: 5.4: import wireguard backport 
Rather than using the clunky, old, slower wireguard-linux-compat out of
tree module, this commit does a patch-by-patch backport of upstream's
wireguard to 5.4. This specific backport is in widespread use, being
part of SUSE's enterprise kernel, Oracle's enterprise kernel, Google's
Android kernel, Gentoo's distro kernel, and probably more I've forgotten
about. It's definately the "more proper" way of adding wireguard to a
kernel than the ugly compat.h hell of the wireguard-linux-compat repo.
And most importantly for OpenWRT, it allows using the same module
configuration code for 5.10 as for 5.4, with no need for bifurcation.

These patches are from the backport tree which is maintained in the
open here: https://git.zx2c4.com/wireguard-linux/log/?h=backport-5.4.y
I'll be sending PRs to update this as needed.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
(cherry picked from commit 3888fa7880)
(cherry picked from commit d540725871)
(cherry picked from commit 196f3d586f)
(cherry picked from commit 3500fd7938)
(cherry picked from commit 23b801d3ba)
(cherry picked from commit 0c0cb97da7)
(cherry picked from commit 2a27f6f90a)
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
2021-04-10 14:21:32 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Mon, 25 Nov 2019 11:31:12 +0100
Subject: [PATCH] crypto: arch - conditionalize crypto api in arch glue for lib
code
commit 8394bfec51e0e565556101bcc4e2fe7551104cd8 upstream.
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>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
arch/arm/crypto/chacha-glue.c | 26 ++++++++++++++++----------
arch/arm/crypto/curve25519-glue.c | 5 +++--
arch/arm/crypto/poly1305-glue.c | 9 ++++++---
arch/arm64/crypto/chacha-neon-glue.c | 5 +++--
arch/arm64/crypto/poly1305-glue.c | 5 +++--
arch/mips/crypto/chacha-glue.c | 6 ++++--
arch/mips/crypto/poly1305-glue.c | 6 ++++--
arch/x86/crypto/blake2s-glue.c | 6 ++++--
arch/x86/crypto/chacha_glue.c | 5 +++--
arch/x86/crypto/curve25519-x86_64.c | 7 ++++---
arch/x86/crypto/poly1305_glue.c | 5 +++--
11 files changed, 53 insertions(+), 32 deletions(-)
--- a/arch/arm/crypto/chacha-glue.c
+++ b/arch/arm/crypto/chacha-glue.c
@@ -286,11 +286,13 @@ static struct skcipher_alg neon_algs[] =
static int __init chacha_simd_mod_init(void)
{
- int err;
+ int err = 0;
- err = crypto_register_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
- if (err)
- return err;
+ if (IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER)) {
+ err = crypto_register_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
+ if (err)
+ return err;
+ }
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON)) {
int i;
@@ -310,18 +312,22 @@ static int __init chacha_simd_mod_init(v
static_branch_enable(&use_neon);
}
- err = crypto_register_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
- if (err)
- crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
+ if (IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER)) {
+ err = crypto_register_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
+ if (err)
+ crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
+ }
}
return err;
}
static void __exit chacha_simd_mod_fini(void)
{
- crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
- if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON))
- crypto_unregister_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
+ if (IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER)) {
+ crypto_unregister_skciphers(arm_algs, ARRAY_SIZE(arm_algs));
+ if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON))
+ crypto_unregister_skciphers(neon_algs, ARRAY_SIZE(neon_algs));
+ }
}
module_init(chacha_simd_mod_init);
--- a/arch/arm/crypto/curve25519-glue.c
+++ b/arch/arm/crypto/curve25519-glue.c
@@ -108,14 +108,15 @@ static int __init mod_init(void)
{
if (elf_hwcap & HWCAP_NEON) {
static_branch_enable(&have_neon);
- return crypto_register_kpp(&curve25519_alg);
+ return IS_REACHABLE(CONFIG_CRYPTO_KPP) ?
+ crypto_register_kpp(&curve25519_alg) : 0;
}
return 0;
}
static void __exit mod_exit(void)
{
- if (elf_hwcap & HWCAP_NEON)
+ if (IS_REACHABLE(CONFIG_CRYPTO_KPP) && elf_hwcap & HWCAP_NEON)
crypto_unregister_kpp(&curve25519_alg);
}
--- a/arch/arm/crypto/poly1305-glue.c
+++ b/arch/arm/crypto/poly1305-glue.c
@@ -249,16 +249,19 @@ static int __init arm_poly1305_mod_init(
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
(elf_hwcap & HWCAP_NEON))
static_branch_enable(&have_neon);
- else
+ else if (IS_REACHABLE(CONFIG_CRYPTO_HASH))
/* register only the first entry */
return crypto_register_shash(&arm_poly1305_algs[0]);
- return crypto_register_shashes(arm_poly1305_algs,
- ARRAY_SIZE(arm_poly1305_algs));
+ return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
+ crypto_register_shashes(arm_poly1305_algs,
+ ARRAY_SIZE(arm_poly1305_algs)) : 0;
}
static void __exit arm_poly1305_mod_exit(void)
{
+ if (!IS_REACHABLE(CONFIG_CRYPTO_HASH))
+ return;
if (!static_branch_likely(&have_neon)) {
crypto_unregister_shash(&arm_poly1305_algs[0]);
return;
--- a/arch/arm64/crypto/chacha-neon-glue.c
+++ b/arch/arm64/crypto/chacha-neon-glue.c
@@ -211,12 +211,13 @@ static int __init chacha_simd_mod_init(v
static_branch_enable(&have_neon);
- return crypto_register_skciphers(algs, ARRAY_SIZE(algs));
+ return IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER) ?
+ crypto_register_skciphers(algs, ARRAY_SIZE(algs)) : 0;
}
static void __exit chacha_simd_mod_fini(void)
{
- if (cpu_have_named_feature(ASIMD))
+ if (IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER) && cpu_have_named_feature(ASIMD))
crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
}
--- a/arch/arm64/crypto/poly1305-glue.c
+++ b/arch/arm64/crypto/poly1305-glue.c
@@ -220,12 +220,13 @@ static int __init neon_poly1305_mod_init
static_branch_enable(&have_neon);
- return crypto_register_shash(&neon_poly1305_alg);
+ return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
+ crypto_register_shash(&neon_poly1305_alg) : 0;
}
static void __exit neon_poly1305_mod_exit(void)
{
- if (cpu_have_named_feature(ASIMD))
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && cpu_have_named_feature(ASIMD))
crypto_unregister_shash(&neon_poly1305_alg);
}
--- a/arch/mips/crypto/chacha-glue.c
+++ b/arch/mips/crypto/chacha-glue.c
@@ -128,12 +128,14 @@ static struct skcipher_alg algs[] = {
static int __init chacha_simd_mod_init(void)
{
- return crypto_register_skciphers(algs, ARRAY_SIZE(algs));
+ return IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER) ?
+ crypto_register_skciphers(algs, ARRAY_SIZE(algs)) : 0;
}
static void __exit chacha_simd_mod_fini(void)
{
- crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
+ if (IS_REACHABLE(CONFIG_CRYPTO_BLKCIPHER))
+ crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
}
module_init(chacha_simd_mod_init);
--- a/arch/mips/crypto/poly1305-glue.c
+++ b/arch/mips/crypto/poly1305-glue.c
@@ -187,12 +187,14 @@ static struct shash_alg mips_poly1305_al
static int __init mips_poly1305_mod_init(void)
{
- return crypto_register_shash(&mips_poly1305_alg);
+ return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
+ crypto_register_shash(&mips_poly1305_alg) : 0;
}
static void __exit mips_poly1305_mod_exit(void)
{
- crypto_unregister_shash(&mips_poly1305_alg);
+ if (IS_REACHABLE(CONFIG_CRYPTO_HASH))
+ crypto_unregister_shash(&mips_poly1305_alg);
}
module_init(mips_poly1305_mod_init);
--- 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));
}
--- 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(v
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_BLKCIPHER) ?
+ 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_BLKCIPHER) && boot_cpu_has(X86_FEATURE_SSSE3))
crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
}
--- 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(vo
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);
}
--- 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
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);
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