diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch b/target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch new file mode 100644 index 0000000000..513025552d --- /dev/null +++ b/target/linux/generic/backport-5.4/080-wireguard-0052-crypto-x86-curve25519-support-assemblers-with-no-adx.patch @@ -0,0 +1,84 @@ +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 +@@ -197,9 +197,10 @@ avx2_instr :=$(call as-instr,vpbroadcast + avx512_instr :=$(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); |