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openwrt/target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch

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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 3888fa78802354ab7bbd19b7d061fd80a16ce06b) (cherry picked from commit d54072587146dd0db9bb52b513234d944edabda3) (cherry picked from commit 196f3d586f11d96ba4ab60068cfb12420bcd20fd) (cherry picked from commit 3500fd7938a6d0c0e320295f0aa2fa34b1ebc08d) (cherry picked from commit 23b801d3ba57e34cc609ea40982c7fbed08164e9) (cherry picked from commit 0c0cb97da7f5cc06919449131dd57ed805f8f78d) (cherry picked from commit 2a27f6f90a430342cdbe84806e8b10acff446a2d) Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
2021-02-19 13:29:04 +00:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 1 Mar 2020 22:52:35 +0800
Subject: [PATCH] crypto: x86/curve25519 - support assemblers with no adx
support
commit 1579f1bc3b753d17a44de3457d5c6f4a5b14c752 upstream.
Some older version of GAS do not support the ADX instructions, similarly
to how they also don't support AVX and such. This commit adds the same
build-time detection mechanisms we use for AVX and others for ADX, and
then makes sure that the curve25519 library dispatcher calls the right
functions.
Reported-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
arch/x86/Makefile | 5 +++--
arch/x86/crypto/Makefile | 7 ++++++-
include/crypto/curve25519.h | 6 ++++--
3 files changed, 13 insertions(+), 5 deletions(-)
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
kernel: bump 5.4 to 5.4.119 Removed because in upstream generic/backport-5.4/050-gro-fix-napi_gro_frags-Fast-GRO-breakage-due-to-IP-a.patch ath79/patches-5.4/0050-spi-ath79-remove-spi-master-setup-and-cleanup-assign.patch ramips/patches-5.4/999-fix-pci-init-mt7620.patch Manually rebased ath79/patches-5.4/0033-spi-ath79-drop-pdata-support.patch All others updated automatically. Compile-tested on: x86/64, ath79/generic Runtime-tested on: x86/64, ath79/generic Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-05-15 14:21:46 +00:00
@@ -198,9 +198,10 @@ avx2_instr :=$(call as-instr,vpbroadcast
kernel: 5.4: import wireguard backport Rather than using the clunky, old, slower wireguard-linux-compat out of tree module, this commit does a patch-by-patch backport of upstream's wireguard to 5.4. This specific backport is in widespread use, being part of SUSE's enterprise kernel, Oracle's enterprise kernel, Google's Android kernel, Gentoo's distro kernel, and probably more I've forgotten about. It's definately the "more proper" way of adding wireguard to a kernel than the ugly compat.h hell of the wireguard-linux-compat repo. And most importantly for OpenWRT, it allows using the same module configuration code for 5.10 as for 5.4, with no need for bifurcation. These patches are from the backport tree which is maintained in the open here: https://git.zx2c4.com/wireguard-linux/log/?h=backport-5.4.y I'll be sending PRs to update this as needed. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> (cherry picked from commit 3888fa78802354ab7bbd19b7d061fd80a16ce06b) (cherry picked from commit d54072587146dd0db9bb52b513234d944edabda3) (cherry picked from commit 196f3d586f11d96ba4ab60068cfb12420bcd20fd) (cherry picked from commit 3500fd7938a6d0c0e320295f0aa2fa34b1ebc08d) (cherry picked from commit 23b801d3ba57e34cc609ea40982c7fbed08164e9) (cherry picked from commit 0c0cb97da7f5cc06919449131dd57ed805f8f78d) (cherry picked from commit 2a27f6f90a430342cdbe84806e8b10acff446a2d) Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
2021-02-19 13:29:04 +00:00
avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)
+adx_instr := $(call as-instr,adox %r10$(comma)%r10,-DCONFIG_AS_ADX=1)
-KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
-KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
+KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
+KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -11,6 +11,7 @@ avx2_supported := $(call as-instr,vpgath
avx512_supported :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,yes,no)
sha1_ni_supported :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,yes,no)
sha256_ni_supported :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,yes,no)
+adx_supported := $(call as-instr,adox %r10$(comma)%r10,yes,no)
obj-$(CONFIG_CRYPTO_GLUE_HELPER_X86) += glue_helper.o
@@ -39,7 +40,11 @@ obj-$(CONFIG_CRYPTO_AEGIS128_AESNI_SSE2)
obj-$(CONFIG_CRYPTO_NHPOLY1305_SSE2) += nhpoly1305-sse2.o
obj-$(CONFIG_CRYPTO_NHPOLY1305_AVX2) += nhpoly1305-avx2.o
-obj-$(CONFIG_CRYPTO_CURVE25519_X86) += curve25519-x86_64.o
+
+# These modules require the assembler to support ADX.
+ifeq ($(adx_supported),yes)
+ obj-$(CONFIG_CRYPTO_CURVE25519_X86) += curve25519-x86_64.o
+endif
# These modules require assembler to support AVX.
ifeq ($(avx_supported),yes)
--- a/include/crypto/curve25519.h
+++ b/include/crypto/curve25519.h
@@ -33,7 +33,8 @@ bool __must_check curve25519(u8 mypublic
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE])
{
- if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CURVE25519))
+ if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CURVE25519) &&
+ (!IS_ENABLED(CONFIG_CRYPTO_CURVE25519_X86) || IS_ENABLED(CONFIG_AS_ADX)))
curve25519_arch(mypublic, secret, basepoint);
else
curve25519_generic(mypublic, secret, basepoint);
@@ -49,7 +50,8 @@ __must_check curve25519_generate_public(
CURVE25519_KEY_SIZE)))
return false;
- if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CURVE25519))
+ if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CURVE25519) &&
+ (!IS_ENABLED(CONFIG_CRYPTO_CURVE25519_X86) || IS_ENABLED(CONFIG_AS_ADX)))
curve25519_base_arch(pub, secret);
else
curve25519_generic(pub, secret, curve25519_base_point);
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