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authorBruce Richardson <bruce.richardson@intel.com>2014-02-17 13:46:06 +0100
committerDavid Marchand <david.marchand@6wind.com>2014-02-25 21:29:18 +0100
commit5e0c946a27d6c00c6ce9341065abbc8b01a2a6b3 (patch)
tree871ab2fe3df78d51a80fee8eb35eb32c51516f3a /mk
parentcb05bb4d33f441a56e77219714c295676d68413a (diff)
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mk: rework cpu flags detection
For cases where the compilation microarchitecture is explicitly given, we extract the cpu-flags to use from the compiler rather than hard-coding. This means that we will only ever use instruction sets supported by the compiler, rather than having a case where the uarch and the Intel DPDK both support a given instruction-set, but the compiler does not. In the case where 'native' uarch support is requested, the same mechanism is also used to detect the instruction-sets supported Signed-off-by: Bruce Richardson <bruce.richardson@intel.com> Signed-off-by: David Marchand <david.marchand@6wind.com>
Diffstat (limited to 'mk')
-rw-r--r--mk/machine/atm/rte.vars.mk1
-rw-r--r--mk/machine/default/rte.vars.mk1
-rw-r--r--mk/machine/ivb/rte.vars.mk1
-rw-r--r--mk/machine/native/rte.vars.mk51
-rw-r--r--mk/machine/nhm/rte.vars.mk1
-rw-r--r--mk/machine/snb/rte.vars.mk1
-rw-r--r--mk/machine/wsm/rte.vars.mk1
-rw-r--r--mk/rte.cpuflags.mk100
-rw-r--r--mk/target/generic/rte.vars.mk4
-rw-r--r--mk/toolchain/gcc/rte.toolchain-compat.mk8
-rw-r--r--mk/toolchain/icc/rte.toolchain-compat.mk8
11 files changed, 104 insertions, 73 deletions
diff --git a/mk/machine/atm/rte.vars.mk b/mk/machine/atm/rte.vars.mk
index 8effe75..5cdf6c4 100644
--- a/mk/machine/atm/rte.vars.mk
+++ b/mk/machine/atm/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=atom
-CPUFLAGS = SSE SSE2 SSE3 SSSE3
diff --git a/mk/machine/default/rte.vars.mk b/mk/machine/default/rte.vars.mk
index 730e531..f05105a 100644
--- a/mk/machine/default/rte.vars.mk
+++ b/mk/machine/default/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS += -march=core2
-CPUFLAGS = SSE SSE2 SSE3
diff --git a/mk/machine/ivb/rte.vars.mk b/mk/machine/ivb/rte.vars.mk
index f1d6f9e..057e933 100644
--- a/mk/machine/ivb/rte.vars.mk
+++ b/mk/machine/ivb/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=core-avx-i
-CPUFLAGS = SSE SSE2 SSE3 SSSE3 SSE4_1 SSE4_2 AES PCLMULQDQ AVX RDRAND FSGSBASE F16C
diff --git a/mk/machine/native/rte.vars.mk b/mk/machine/native/rte.vars.mk
index 9be1ccd..0e55b85 100644
--- a/mk/machine/native/rte.vars.mk
+++ b/mk/machine/native/rte.vars.mk
@@ -56,54 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=native
-AUTO_CPUFLAGS = $(shell grep -m 1 flags /proc/cpuinfo)
-
-# adding flags to CPUFLAGS
-
-ifneq ($(filter $(AUTO_CPUFLAGS),sse),)
-CPUFLAGS += SSE
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),sse2),)
-CPUFLAGS += SSE2
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),sse3),)
-CPUFLAGS += SSE3
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),ssse3),)
-CPUFLAGS += SSSE3
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),sse4_1),)
-CPUFLAGS += SSE4_1
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),sse4_2),)
-CPUFLAGS += SSE4_2
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),aes),)
-CPUFLAGS += AES
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),pclmulqdq),)
-CPUFLAGS += PCLMULQDQ
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),avx),)
-CPUFLAGS += AVX
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),rdrnd),)
-CPUFLAGS += RDRAND
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),fsgsbase),)
-CPUFLAGS += FSGSBASE
-endif
-
-ifneq ($(filter $(AUTO_CPUFLAGS),f16c),)
-CPUFLAGS += F16C
-endif
diff --git a/mk/machine/nhm/rte.vars.mk b/mk/machine/nhm/rte.vars.mk
index daa0062..9a30203 100644
--- a/mk/machine/nhm/rte.vars.mk
+++ b/mk/machine/nhm/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=corei7
-CPUFLAGS = SSE SSE2 SSE3 SSSE3 SSE4_1 SSE4_2
diff --git a/mk/machine/snb/rte.vars.mk b/mk/machine/snb/rte.vars.mk
index 67864a6..1fadd81 100644
--- a/mk/machine/snb/rte.vars.mk
+++ b/mk/machine/snb/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=corei7-avx
-CPUFLAGS = SSE SSE2 SSE3 SSSE3 SSE4_1 SSE4_2 AES PCLMULQDQ AVX
diff --git a/mk/machine/wsm/rte.vars.mk b/mk/machine/wsm/rte.vars.mk
index f91be19..7d69a78 100644
--- a/mk/machine/wsm/rte.vars.mk
+++ b/mk/machine/wsm/rte.vars.mk
@@ -56,4 +56,3 @@
# CPU_ASFLAGS =
MACHINE_CFLAGS = -march=corei7 -maes -mpclmul
-CPUFLAGS = SSE SSE2 SSE3 SSSE3 SSE4_1 SSE4_2 AES PCLMULQDQ
diff --git a/mk/rte.cpuflags.mk b/mk/rte.cpuflags.mk
new file mode 100644
index 0000000..b8248a5
--- /dev/null
+++ b/mk/rte.cpuflags.mk
@@ -0,0 +1,100 @@
+# BSD LICENSE
+#
+# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# this makefile is called from the generic rte.vars.mk and is
+# used to set the RTE_CPUFLAG_* environment variables giving details
+# of what instruction sets the target cpu supports.
+
+AUTO_CPUFLAGS := $(shell $(CC) $(MACHINE_CFLAGS) -dM -E - < /dev/null)
+
+# adding flags to CPUFLAGS
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSE__),)
+CPUFLAGS += SSE
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSE2__),)
+CPUFLAGS += SSE2
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSE3__),)
+CPUFLAGS += SSE3
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSSE3__),)
+CPUFLAGS += SSSE3
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSE4_1__),)
+CPUFLAGS += SSE4_1
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__SSE4_2__),)
+CPUFLAGS += SSE4_2
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__AES__),)
+CPUFLAGS += AES
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__PCLMUL__),)
+CPUFLAGS += PCLMULQDQ
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__AVX__),)
+CPUFLAGS += AVX
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__RDRND__),)
+CPUFLAGS += RDRAND
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__FSGSBASE__),)
+CPUFLAGS += FSGSBASE
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__F16C__),)
+CPUFLAGS += F16C
+endif
+
+ifneq ($(filter $(AUTO_CPUFLAGS),__AVX2__),)
+CPUFLAGS += AVX2
+endif
+
+MACHINE_CFLAGS += $(addprefix -DRTE_MACHINE_CPUFLAG_,$(CPUFLAGS))
+
+# To strip whitespace
+comma:= ,
+empty:=
+space:= $(empty) $(empty)
+CPUFLAGSTMP1 := $(addprefix RTE_CPUFLAG_,$(CPUFLAGS))
+CPUFLAGSTMP2 := $(subst $(space),$(comma),$(CPUFLAGSTMP1))
+MACHINE_CFLAGS += -DRTE_COMPILE_TIME_CPUFLAGS=$(CPUFLAGSTMP2)
diff --git a/mk/target/generic/rte.vars.mk b/mk/target/generic/rte.vars.mk
index 8b0cc25..796cca7 100644
--- a/mk/target/generic/rte.vars.mk
+++ b/mk/target/generic/rte.vars.mk
@@ -102,6 +102,10 @@ include $(RTE_SDK)/mk/exec-env/$(RTE_EXEC_ENV)/rte.vars.mk
# provided by Kbuild framework.
ifeq ($(KERNELRELEASE),)
+# now that the environment is mostly set up, including the machine type we will
+# be passing to the compiler, set up the specific CPU flags based on that info.
+include $(RTE_SDK)/mk/rte.cpuflags.mk
+
# merge all CFLAGS
CFLAGS := $(CPU_CFLAGS) $(EXECENV_CFLAGS) $(TOOLCHAIN_CFLAGS) $(MACHINE_CFLAGS)
CFLAGS += $(TARGET_CFLAGS)
diff --git a/mk/toolchain/gcc/rte.toolchain-compat.mk b/mk/toolchain/gcc/rte.toolchain-compat.mk
index dfb72c5..730b2f6 100644
--- a/mk/toolchain/gcc/rte.toolchain-compat.mk
+++ b/mk/toolchain/gcc/rte.toolchain-compat.mk
@@ -86,12 +86,4 @@ else
MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
endif
endif
-MACHINE_CFLAGS += $(addprefix -DRTE_MACHINE_CPUFLAG_,$(CPUFLAGS))
-# To strip whitespace
-comma:= ,
-empty:=
-space:= $(empty) $(empty)
-CPUFLAGSTMP1 := $(addprefix RTE_CPUFLAG_,$(CPUFLAGS))
-CPUFLAGSTMP2 := $(subst $(space),$(comma),$(CPUFLAGSTMP1))
-MACHINE_CFLAGS += -DRTE_COMPILE_TIME_CPUFLAGS=$(CPUFLAGSTMP2)
diff --git a/mk/toolchain/icc/rte.toolchain-compat.mk b/mk/toolchain/icc/rte.toolchain-compat.mk
index 6e15dd8..888b133 100644
--- a/mk/toolchain/icc/rte.toolchain-compat.mk
+++ b/mk/toolchain/icc/rte.toolchain-compat.mk
@@ -71,12 +71,4 @@ else
MACHINE_CFLAGS := $(patsubst -march=%,-xSSE3,$(MACHINE_CFLAGS))
endif
endif
-MACHINE_CFLAGS += $(addprefix -DRTE_MACHINE_CPUFLAG_,$(CPUFLAGS))
-# To strip whitespace
-comma:= ,
-empty:=
-space:= $(empty) $(empty)
-CPUFLAGSTMP1 := $(addprefix RTE_CPUFLAG_,$(CPUFLAGS))
-CPUFLAGSTMP2 := $(subst $(space),$(comma),$(CPUFLAGSTMP1))
-MACHINE_CFLAGS += -DRTE_COMPILE_TIME_CPUFLAGS=$(CPUFLAGSTMP2)