| Message ID | 20200324084821.29944-7-masahiroy@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | x86, crypto: remove always-defined CONFIG_AS_* and cosolidate Kconfig/Makefiles | expand |
On Tue, Mar 24, 2020 at 1:49 AM Masahiro Yamada <masahiroy@kernel.org> wrote: > > CONFIG_AS_SSSE3 was introduced by commit 75aaf4c3e6a4 ("x86/raid6: > correctly check for assembler capabilities"). > > We raise the minimal supported binutils version from time to time. > The last bump was commit 1fb12b35e5ff ("kbuild: Raise the minimum > required binutils version to 2.21"). Looks like binutils gained SSE3 support in 2005; 2.21 was released in 2010. Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> > > I confirmed the code in $(call as-instr,...) can be assembled by the > binutils 2.21 assembler and also by LLVM integrated assembler. > > Remove CONFIG_AS_SSSE3, which is always defined. > > I added ifdef CONFIG_X86 to lib/raid6/algos.c to avoid link errors > on non-x86 architectures. > > lib/raid6/algos.c is built not only for the kernel but also for > testing the library code from userspace. I added -DCONFIG_X86 to > lib/raid6/test/Makefile to cator to this usecase. > > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> > Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> > --- > > arch/x86/Makefile | 5 ++--- > arch/x86/crypto/blake2s-core.S | 2 -- > lib/raid6/algos.c | 2 +- > lib/raid6/recov_ssse3.c | 6 ------ > lib/raid6/test/Makefile | 4 +--- > 5 files changed, 4 insertions(+), 15 deletions(-) > > diff --git a/arch/x86/Makefile b/arch/x86/Makefile > index e4a062313bb0..94f89612e024 100644 > --- a/arch/x86/Makefile > +++ b/arch/x86/Makefile > @@ -178,7 +178,6 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) > endif > > # does binutils support specific instructions? > -asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) > avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) > avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) > avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) > @@ -186,8 +185,8 @@ sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI= > sha256_ni_instr :=$(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 += $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) > -KBUILD_CFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) > +KBUILD_AFLAGS += $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) > +KBUILD_CFLAGS += $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) > > KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) > > diff --git a/arch/x86/crypto/blake2s-core.S b/arch/x86/crypto/blake2s-core.S > index 24910b766bdd..2ca79974f819 100644 > --- a/arch/x86/crypto/blake2s-core.S > +++ b/arch/x86/crypto/blake2s-core.S > @@ -46,7 +46,6 @@ SIGMA2: > #endif /* CONFIG_AS_AVX512 */ > > .text > -#ifdef CONFIG_AS_SSSE3 > SYM_FUNC_START(blake2s_compress_ssse3) > testq %rdx,%rdx > je .Lendofloop > @@ -174,7 +173,6 @@ SYM_FUNC_START(blake2s_compress_ssse3) > .Lendofloop: > ret > SYM_FUNC_END(blake2s_compress_ssse3) > -#endif /* CONFIG_AS_SSSE3 */ > > #ifdef CONFIG_AS_AVX512 > SYM_FUNC_START(blake2s_compress_avx512) > diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c > index bf1b4765c8f6..df08664d3432 100644 > --- a/lib/raid6/algos.c > +++ b/lib/raid6/algos.c > @@ -97,13 +97,13 @@ void (*raid6_datap_recov)(int, size_t, int, void **); > EXPORT_SYMBOL_GPL(raid6_datap_recov); > > const struct raid6_recov_calls *const raid6_recov_algos[] = { > +#ifdef CONFIG_X86 > #ifdef CONFIG_AS_AVX512 > &raid6_recov_avx512, > #endif > #ifdef CONFIG_AS_AVX2 > &raid6_recov_avx2, > #endif > -#ifdef CONFIG_AS_SSSE3 > &raid6_recov_ssse3, > #endif > #ifdef CONFIG_S390 > diff --git a/lib/raid6/recov_ssse3.c b/lib/raid6/recov_ssse3.c > index 1de97d2405d0..4bfa3c6b60de 100644 > --- a/lib/raid6/recov_ssse3.c > +++ b/lib/raid6/recov_ssse3.c > @@ -3,8 +3,6 @@ > * Copyright (C) 2012 Intel Corporation > */ > > -#ifdef CONFIG_AS_SSSE3 > - > #include <linux/raid/pq.h> > #include "x86.h" > > @@ -328,7 +326,3 @@ const struct raid6_recov_calls raid6_recov_ssse3 = { > #endif > .priority = 1, > }; > - > -#else > -#warning "your version of binutils lacks SSSE3 support" > -#endif > diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile > index b9e6c3648be1..60021319ac78 100644 > --- a/lib/raid6/test/Makefile > +++ b/lib/raid6/test/Makefile > @@ -34,9 +34,7 @@ endif > > ifeq ($(IS_X86),yes) > OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o > - CFLAGS += $(shell echo "pshufb %xmm0, %xmm0" | \ > - gcc -c -x assembler - >/dev/null 2>&1 && \ > - rm ./-.o && echo -DCONFIG_AS_SSSE3=1) > + CFLAGS += -DCONFIG_X86 > CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \ > gcc -c -x assembler - >/dev/null 2>&1 && \ > rm ./-.o && echo -DCONFIG_AS_AVX2=1) > -- > 2.17.1 > > --
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index e4a062313bb0..94f89612e024 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -178,7 +178,6 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) endif # does binutils support specific instructions? -asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) @@ -186,8 +185,8 @@ sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI= sha256_ni_instr :=$(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 += $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) -KBUILD_CFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) +KBUILD_AFLAGS += $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) +KBUILD_CFLAGS += $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) diff --git a/arch/x86/crypto/blake2s-core.S b/arch/x86/crypto/blake2s-core.S index 24910b766bdd..2ca79974f819 100644 --- a/arch/x86/crypto/blake2s-core.S +++ b/arch/x86/crypto/blake2s-core.S @@ -46,7 +46,6 @@ SIGMA2: #endif /* CONFIG_AS_AVX512 */ .text -#ifdef CONFIG_AS_SSSE3 SYM_FUNC_START(blake2s_compress_ssse3) testq %rdx,%rdx je .Lendofloop @@ -174,7 +173,6 @@ SYM_FUNC_START(blake2s_compress_ssse3) .Lendofloop: ret SYM_FUNC_END(blake2s_compress_ssse3) -#endif /* CONFIG_AS_SSSE3 */ #ifdef CONFIG_AS_AVX512 SYM_FUNC_START(blake2s_compress_avx512) diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c index bf1b4765c8f6..df08664d3432 100644 --- a/lib/raid6/algos.c +++ b/lib/raid6/algos.c @@ -97,13 +97,13 @@ void (*raid6_datap_recov)(int, size_t, int, void **); EXPORT_SYMBOL_GPL(raid6_datap_recov); const struct raid6_recov_calls *const raid6_recov_algos[] = { +#ifdef CONFIG_X86 #ifdef CONFIG_AS_AVX512 &raid6_recov_avx512, #endif #ifdef CONFIG_AS_AVX2 &raid6_recov_avx2, #endif -#ifdef CONFIG_AS_SSSE3 &raid6_recov_ssse3, #endif #ifdef CONFIG_S390 diff --git a/lib/raid6/recov_ssse3.c b/lib/raid6/recov_ssse3.c index 1de97d2405d0..4bfa3c6b60de 100644 --- a/lib/raid6/recov_ssse3.c +++ b/lib/raid6/recov_ssse3.c @@ -3,8 +3,6 @@ * Copyright (C) 2012 Intel Corporation */ -#ifdef CONFIG_AS_SSSE3 - #include <linux/raid/pq.h> #include "x86.h" @@ -328,7 +326,3 @@ const struct raid6_recov_calls raid6_recov_ssse3 = { #endif .priority = 1, }; - -#else -#warning "your version of binutils lacks SSSE3 support" -#endif diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile index b9e6c3648be1..60021319ac78 100644 --- a/lib/raid6/test/Makefile +++ b/lib/raid6/test/Makefile @@ -34,9 +34,7 @@ endif ifeq ($(IS_X86),yes) OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o - CFLAGS += $(shell echo "pshufb %xmm0, %xmm0" | \ - gcc -c -x assembler - >/dev/null 2>&1 && \ - rm ./-.o && echo -DCONFIG_AS_SSSE3=1) + CFLAGS += -DCONFIG_X86 CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \ gcc -c -x assembler - >/dev/null 2>&1 && \ rm ./-.o && echo -DCONFIG_AS_AVX2=1)
CONFIG_AS_SSSE3 was introduced by commit 75aaf4c3e6a4 ("x86/raid6: correctly check for assembler capabilities"). We raise the minimal supported binutils version from time to time. The last bump was commit 1fb12b35e5ff ("kbuild: Raise the minimum required binutils version to 2.21"). I confirmed the code in $(call as-instr,...) can be assembled by the binutils 2.21 assembler and also by LLVM integrated assembler. Remove CONFIG_AS_SSSE3, which is always defined. I added ifdef CONFIG_X86 to lib/raid6/algos.c to avoid link errors on non-x86 architectures. lib/raid6/algos.c is built not only for the kernel but also for testing the library code from userspace. I added -DCONFIG_X86 to lib/raid6/test/Makefile to cator to this usecase. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> --- arch/x86/Makefile | 5 ++--- arch/x86/crypto/blake2s-core.S | 2 -- lib/raid6/algos.c | 2 +- lib/raid6/recov_ssse3.c | 6 ------ lib/raid6/test/Makefile | 4 +--- 5 files changed, 4 insertions(+), 15 deletions(-)