[dpdk-dev] [PATCH 7/7] Split CPU flags operations to architecture specific

Chao Zhu bjzhuc at cn.ibm.com
Fri Sep 26 11:33:38 CEST 2014


This patch splits CPU flags related operations from DPDK and push them
to architecture specific arch directories, so that other processor
architecture to support DPDK can be easily adopted.

Signed-off-by: Chao Zhu <bjzhuc at cn.ibm.com>
---
 lib/librte_eal/common/Makefile                     |    2 +-
 lib/librte_eal/common/eal_common_cpuflags.c        |  173 +----------
 .../common/include/i686/arch/rte_cpuflags_arch.h   |  335 ++++++++++++++++++++
 lib/librte_eal/common/include/rte_cpuflags.h       |  110 +-------
 .../common/include/x86_64/arch/rte_cpuflags_arch.h |  335 ++++++++++++++++++++
 5 files changed, 674 insertions(+), 281 deletions(-)
 create mode 100644 lib/librte_eal/common/include/i686/arch/rte_cpuflags_arch.h
 create mode 100644 lib/librte_eal/common/include/x86_64/arch/rte_cpuflags_arch.h

diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
index 4add1c1..ff56255 100644
--- a/lib/librte_eal/common/Makefile
+++ b/lib/librte_eal/common/Makefile
@@ -46,7 +46,7 @@ ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
 INC += rte_warnings.h
 endif
 
-ARCH_INC := rte_atomic.h rte_atomic_arch.h rte_byteorder_arch.h rte_cycles_arch.h rte_prefetch_arch.h rte_spinlock_arch.h rte_memcpy_arch.h 
+ARCH_INC := rte_atomic.h rte_atomic_arch.h rte_byteorder_arch.h rte_cycles_arch.h rte_prefetch_arch.h rte_spinlock_arch.h rte_memcpy_arch.h rte_cpuflags_arch.h
 
 SYMLINK-$(CONFIG_RTE_LIBRTE_EAL)-include := $(addprefix include/,$(INC))
 SYMLINK-$(CONFIG_RTE_LIBRTE_EAL)-include/arch := \
diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
index 9e79179..aa58b05 100644
--- a/lib/librte_eal/common/eal_common_cpuflags.c
+++ b/lib/librte_eal/common/eal_common_cpuflags.c
@@ -30,10 +30,6 @@
  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <stdint.h>
 #include <rte_cpuflags.h>
 
 /*
@@ -49,131 +45,6 @@
 #endif
 #endif
 
-/**
- * Enumeration of CPU registers
- */
-enum cpu_register_t {
-	REG_EAX = 0,
-	REG_EBX,
-	REG_ECX,
-	REG_EDX,
-};
-
-typedef uint32_t cpuid_registers_t[4];
-
-#define CPU_FLAG_NAME_MAX_LEN 64
-
-/**
- * Struct to hold a processor feature entry
- */
-struct feature_entry {
-	uint32_t leaf;				/**< cpuid leaf */
-	uint32_t subleaf;			/**< cpuid subleaf */
-	uint32_t reg;				/**< cpuid register */
-	uint32_t bit;				/**< cpuid register bit */
-	char name[CPU_FLAG_NAME_MAX_LEN];       /**< String for printing */
-};
-
-#define FEAT_DEF(name, leaf, subleaf, reg, bit) \
-	[RTE_CPUFLAG_##name] = {leaf, subleaf, reg, bit, #name },
-
-/**
- * An array that holds feature entries
- */
-static const struct feature_entry cpu_feature_table[] = {
-	FEAT_DEF(SSE3, 0x00000001, 0, REG_ECX,  0)
-	FEAT_DEF(PCLMULQDQ, 0x00000001, 0, REG_ECX,  1)
-	FEAT_DEF(DTES64, 0x00000001, 0, REG_ECX,  2)
-	FEAT_DEF(MONITOR, 0x00000001, 0, REG_ECX,  3)
-	FEAT_DEF(DS_CPL, 0x00000001, 0, REG_ECX,  4)
-	FEAT_DEF(VMX, 0x00000001, 0, REG_ECX,  5)
-	FEAT_DEF(SMX, 0x00000001, 0, REG_ECX,  6)
-	FEAT_DEF(EIST, 0x00000001, 0, REG_ECX,  7)
-	FEAT_DEF(TM2, 0x00000001, 0, REG_ECX,  8)
-	FEAT_DEF(SSSE3, 0x00000001, 0, REG_ECX,  9)
-	FEAT_DEF(CNXT_ID, 0x00000001, 0, REG_ECX, 10)
-	FEAT_DEF(FMA, 0x00000001, 0, REG_ECX, 12)
-	FEAT_DEF(CMPXCHG16B, 0x00000001, 0, REG_ECX, 13)
-	FEAT_DEF(XTPR, 0x00000001, 0, REG_ECX, 14)
-	FEAT_DEF(PDCM, 0x00000001, 0, REG_ECX, 15)
-	FEAT_DEF(PCID, 0x00000001, 0, REG_ECX, 17)
-	FEAT_DEF(DCA, 0x00000001, 0, REG_ECX, 18)
-	FEAT_DEF(SSE4_1, 0x00000001, 0, REG_ECX, 19)
-	FEAT_DEF(SSE4_2, 0x00000001, 0, REG_ECX, 20)
-	FEAT_DEF(X2APIC, 0x00000001, 0, REG_ECX, 21)
-	FEAT_DEF(MOVBE, 0x00000001, 0, REG_ECX, 22)
-	FEAT_DEF(POPCNT, 0x00000001, 0, REG_ECX, 23)
-	FEAT_DEF(TSC_DEADLINE, 0x00000001, 0, REG_ECX, 24)
-	FEAT_DEF(AES, 0x00000001, 0, REG_ECX, 25)
-	FEAT_DEF(XSAVE, 0x00000001, 0, REG_ECX, 26)
-	FEAT_DEF(OSXSAVE, 0x00000001, 0, REG_ECX, 27)
-	FEAT_DEF(AVX, 0x00000001, 0, REG_ECX, 28)
-	FEAT_DEF(F16C, 0x00000001, 0, REG_ECX, 29)
-	FEAT_DEF(RDRAND, 0x00000001, 0, REG_ECX, 30)
-
-	FEAT_DEF(FPU, 0x00000001, 0, REG_EDX,  0)
-	FEAT_DEF(VME, 0x00000001, 0, REG_EDX,  1)
-	FEAT_DEF(DE, 0x00000001, 0, REG_EDX,  2)
-	FEAT_DEF(PSE, 0x00000001, 0, REG_EDX,  3)
-	FEAT_DEF(TSC, 0x00000001, 0, REG_EDX,  4)
-	FEAT_DEF(MSR, 0x00000001, 0, REG_EDX,  5)
-	FEAT_DEF(PAE, 0x00000001, 0, REG_EDX,  6)
-	FEAT_DEF(MCE, 0x00000001, 0, REG_EDX,  7)
-	FEAT_DEF(CX8, 0x00000001, 0, REG_EDX,  8)
-	FEAT_DEF(APIC, 0x00000001, 0, REG_EDX,  9)
-	FEAT_DEF(SEP, 0x00000001, 0, REG_EDX, 11)
-	FEAT_DEF(MTRR, 0x00000001, 0, REG_EDX, 12)
-	FEAT_DEF(PGE, 0x00000001, 0, REG_EDX, 13)
-	FEAT_DEF(MCA, 0x00000001, 0, REG_EDX, 14)
-	FEAT_DEF(CMOV, 0x00000001, 0, REG_EDX, 15)
-	FEAT_DEF(PAT, 0x00000001, 0, REG_EDX, 16)
-	FEAT_DEF(PSE36, 0x00000001, 0, REG_EDX, 17)
-	FEAT_DEF(PSN, 0x00000001, 0, REG_EDX, 18)
-	FEAT_DEF(CLFSH, 0x00000001, 0, REG_EDX, 19)
-	FEAT_DEF(DS, 0x00000001, 0, REG_EDX, 21)
-	FEAT_DEF(ACPI, 0x00000001, 0, REG_EDX, 22)
-	FEAT_DEF(MMX, 0x00000001, 0, REG_EDX, 23)
-	FEAT_DEF(FXSR, 0x00000001, 0, REG_EDX, 24)
-	FEAT_DEF(SSE, 0x00000001, 0, REG_EDX, 25)
-	FEAT_DEF(SSE2, 0x00000001, 0, REG_EDX, 26)
-	FEAT_DEF(SS, 0x00000001, 0, REG_EDX, 27)
-	FEAT_DEF(HTT, 0x00000001, 0, REG_EDX, 28)
-	FEAT_DEF(TM, 0x00000001, 0, REG_EDX, 29)
-	FEAT_DEF(PBE, 0x00000001, 0, REG_EDX, 31)
-
-	FEAT_DEF(DIGTEMP, 0x00000006, 0, REG_EAX,  0)
-	FEAT_DEF(TRBOBST, 0x00000006, 0, REG_EAX,  1)
-	FEAT_DEF(ARAT, 0x00000006, 0, REG_EAX,  2)
-	FEAT_DEF(PLN, 0x00000006, 0, REG_EAX,  4)
-	FEAT_DEF(ECMD, 0x00000006, 0, REG_EAX,  5)
-	FEAT_DEF(PTM, 0x00000006, 0, REG_EAX,  6)
-
-	FEAT_DEF(MPERF_APERF_MSR, 0x00000006, 0, REG_ECX,  0)
-	FEAT_DEF(ACNT2, 0x00000006, 0, REG_ECX,  1)
-	FEAT_DEF(ENERGY_EFF, 0x00000006, 0, REG_ECX,  3)
-
-	FEAT_DEF(FSGSBASE, 0x00000007, 0, REG_EBX,  0)
-	FEAT_DEF(BMI1, 0x00000007, 0, REG_EBX,  2)
-	FEAT_DEF(HLE, 0x00000007, 0, REG_EBX,  4)
-	FEAT_DEF(AVX2, 0x00000007, 0, REG_EBX,  5)
-	FEAT_DEF(SMEP, 0x00000007, 0, REG_EBX,  6)
-	FEAT_DEF(BMI2, 0x00000007, 0, REG_EBX,  7)
-	FEAT_DEF(ERMS, 0x00000007, 0, REG_EBX,  8)
-	FEAT_DEF(INVPCID, 0x00000007, 0, REG_EBX, 10)
-	FEAT_DEF(RTM, 0x00000007, 0, REG_EBX, 11)
-
-	FEAT_DEF(LAHF_SAHF, 0x80000001, 0, REG_ECX,  0)
-	FEAT_DEF(LZCNT, 0x80000001, 0, REG_ECX,  4)
-
-	FEAT_DEF(SYSCALL, 0x80000001, 0, REG_EDX, 11)
-	FEAT_DEF(XD, 0x80000001, 0, REG_EDX, 20)
-	FEAT_DEF(1GB_PG, 0x80000001, 0, REG_EDX, 26)
-	FEAT_DEF(RDTSCP, 0x80000001, 0, REG_EDX, 27)
-	FEAT_DEF(EM64T, 0x80000001, 0, REG_EDX, 29)
-
-	FEAT_DEF(INVTSC, 0x80000007, 0, REG_EDX,  8)
-};
-
 /*
  * Execute CPUID instruction and get contents of a specific register
  *
@@ -183,24 +54,7 @@ static const struct feature_entry cpu_feature_table[] = {
 static inline void
 rte_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out)
 {
-#if defined(__i386__) && defined(__PIC__)
-    /* %ebx is a forbidden register if we compile with -fPIC or -fPIE */
-    asm volatile("movl %%ebx,%0 ; cpuid ; xchgl %%ebx,%0"
-		 : "=r" (out[REG_EBX]),
-		   "=a" (out[REG_EAX]),
-		   "=c" (out[REG_ECX]),
-		   "=d" (out[REG_EDX])
-		 : "a" (leaf), "c" (subleaf));
-#else
-
-    asm volatile("cpuid"
-		 : "=a" (out[REG_EAX]),
-		   "=b" (out[REG_EBX]),
-		   "=c" (out[REG_ECX]),
-		   "=d" (out[REG_EDX])
-		 : "a" (leaf), "c" (subleaf));
-
-#endif
+    rte_arch_cpu_get_features(leaf, subleaf, out);
 }
 
 /*
@@ -209,30 +63,7 @@ rte_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out)
 int
 rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
 {
-	const struct feature_entry *feat;
-	cpuid_registers_t regs;
-
-
-	if (feature >= RTE_CPUFLAG_NUMFLAGS)
-		/* Flag does not match anything in the feature tables */
-		return -ENOENT;
-
-	feat = &cpu_feature_table[feature];
-
-	if (!feat->leaf)
-		/* This entry in the table wasn't filled out! */
-		return -EFAULT;
-
-	rte_cpu_get_features(feat->leaf & 0xffff0000, 0, regs);
-	if (((regs[REG_EAX] ^ feat->leaf) & 0xffff0000) ||
-	      regs[REG_EAX] < feat->leaf)
-		return 0;
-
-	/* get the cpuid leaf containing the desired feature */
-	rte_cpu_get_features(feat->leaf, feat->subleaf, regs);
-
-	/* check if the feature is enabled */
-	return (regs[feat->reg] >> feat->bit) & 1;
+	return rte_arch_cpu_get_flag_enabled(feature);
 }
 
 /**
diff --git a/lib/librte_eal/common/include/i686/arch/rte_cpuflags_arch.h b/lib/librte_eal/common/include/i686/arch/rte_cpuflags_arch.h
new file mode 100644
index 0000000..b2f078a
--- /dev/null
+++ b/lib/librte_eal/common/include/i686/arch/rte_cpuflags_arch.h
@@ -0,0 +1,335 @@
+/*-
+ *   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.
+ */
+
+#ifndef _RTE_CPUFLAGS_ARCH_H_
+#define _RTE_CPUFLAGS_ARCH_H_
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+
+/**
+ * Enumeration of CPU registers
+ */
+enum cpu_register_t {
+	REG_EAX = 0,
+	REG_EBX,
+	REG_ECX,
+	REG_EDX,
+};
+
+/**
+ * Enumeration of all CPU features supported
+ */
+enum rte_cpu_flag_t {
+	/* (EAX 01h) ECX features*/
+	RTE_CPUFLAG_SSE3 = 0,               /**< SSE3 */
+	RTE_CPUFLAG_PCLMULQDQ,              /**< PCLMULQDQ */
+	RTE_CPUFLAG_DTES64,                 /**< DTES64 */
+	RTE_CPUFLAG_MONITOR,                /**< MONITOR */
+	RTE_CPUFLAG_DS_CPL,                 /**< DS_CPL */
+	RTE_CPUFLAG_VMX,                    /**< VMX */
+	RTE_CPUFLAG_SMX,                    /**< SMX */
+	RTE_CPUFLAG_EIST,                   /**< EIST */
+	RTE_CPUFLAG_TM2,                    /**< TM2 */
+	RTE_CPUFLAG_SSSE3,                  /**< SSSE3 */
+	RTE_CPUFLAG_CNXT_ID,                /**< CNXT_ID */
+	RTE_CPUFLAG_FMA,                    /**< FMA */
+	RTE_CPUFLAG_CMPXCHG16B,             /**< CMPXCHG16B */
+	RTE_CPUFLAG_XTPR,                   /**< XTPR */
+	RTE_CPUFLAG_PDCM,                   /**< PDCM */
+	RTE_CPUFLAG_PCID,                   /**< PCID */
+	RTE_CPUFLAG_DCA,                    /**< DCA */
+	RTE_CPUFLAG_SSE4_1,                 /**< SSE4_1 */
+	RTE_CPUFLAG_SSE4_2,                 /**< SSE4_2 */
+	RTE_CPUFLAG_X2APIC,                 /**< X2APIC */
+	RTE_CPUFLAG_MOVBE,                  /**< MOVBE */
+	RTE_CPUFLAG_POPCNT,                 /**< POPCNT */
+	RTE_CPUFLAG_TSC_DEADLINE,           /**< TSC_DEADLINE */
+	RTE_CPUFLAG_AES,                    /**< AES */
+	RTE_CPUFLAG_XSAVE,                  /**< XSAVE */
+	RTE_CPUFLAG_OSXSAVE,                /**< OSXSAVE */
+	RTE_CPUFLAG_AVX,                    /**< AVX */
+	RTE_CPUFLAG_F16C,                   /**< F16C */
+	RTE_CPUFLAG_RDRAND,                 /**< RDRAND */
+
+	/* (EAX 01h) EDX features */
+	RTE_CPUFLAG_FPU,                    /**< FPU */
+	RTE_CPUFLAG_VME,                    /**< VME */
+	RTE_CPUFLAG_DE,                     /**< DE */
+	RTE_CPUFLAG_PSE,                    /**< PSE */
+	RTE_CPUFLAG_TSC,                    /**< TSC */
+	RTE_CPUFLAG_MSR,                    /**< MSR */
+	RTE_CPUFLAG_PAE,                    /**< PAE */
+	RTE_CPUFLAG_MCE,                    /**< MCE */
+	RTE_CPUFLAG_CX8,                    /**< CX8 */
+	RTE_CPUFLAG_APIC,                   /**< APIC */
+	RTE_CPUFLAG_SEP,                    /**< SEP */
+	RTE_CPUFLAG_MTRR,                   /**< MTRR */
+	RTE_CPUFLAG_PGE,                    /**< PGE */
+	RTE_CPUFLAG_MCA,                    /**< MCA */
+	RTE_CPUFLAG_CMOV,                   /**< CMOV */
+	RTE_CPUFLAG_PAT,                    /**< PAT */
+	RTE_CPUFLAG_PSE36,                  /**< PSE36 */
+	RTE_CPUFLAG_PSN,                    /**< PSN */
+	RTE_CPUFLAG_CLFSH,                  /**< CLFSH */
+	RTE_CPUFLAG_DS,                     /**< DS */
+	RTE_CPUFLAG_ACPI,                   /**< ACPI */
+	RTE_CPUFLAG_MMX,                    /**< MMX */
+	RTE_CPUFLAG_FXSR,                   /**< FXSR */
+	RTE_CPUFLAG_SSE,                    /**< SSE */
+	RTE_CPUFLAG_SSE2,                   /**< SSE2 */
+	RTE_CPUFLAG_SS,                     /**< SS */
+	RTE_CPUFLAG_HTT,                    /**< HTT */
+	RTE_CPUFLAG_TM,                     /**< TM */
+	RTE_CPUFLAG_PBE,                    /**< PBE */
+
+	/* (EAX 06h) EAX features */
+	RTE_CPUFLAG_DIGTEMP,                /**< DIGTEMP */
+	RTE_CPUFLAG_TRBOBST,                /**< TRBOBST */
+	RTE_CPUFLAG_ARAT,                   /**< ARAT */
+	RTE_CPUFLAG_PLN,                    /**< PLN */
+	RTE_CPUFLAG_ECMD,                   /**< ECMD */
+	RTE_CPUFLAG_PTM,                    /**< PTM */
+
+	/* (EAX 06h) ECX features */
+	RTE_CPUFLAG_MPERF_APERF_MSR,        /**< MPERF_APERF_MSR */
+	RTE_CPUFLAG_ACNT2,                  /**< ACNT2 */
+	RTE_CPUFLAG_ENERGY_EFF,             /**< ENERGY_EFF */
+
+	/* (EAX 07h, ECX 0h) EBX features */
+	RTE_CPUFLAG_FSGSBASE,               /**< FSGSBASE */
+	RTE_CPUFLAG_BMI1,                   /**< BMI1 */
+	RTE_CPUFLAG_HLE,                    /**< Hardware Lock elision */
+	RTE_CPUFLAG_AVX2,                   /**< AVX2 */
+	RTE_CPUFLAG_SMEP,                   /**< SMEP */
+	RTE_CPUFLAG_BMI2,                   /**< BMI2 */
+	RTE_CPUFLAG_ERMS,                   /**< ERMS */
+	RTE_CPUFLAG_INVPCID,                /**< INVPCID */
+	RTE_CPUFLAG_RTM,                    /**< Transactional memory */
+
+	/* (EAX 80000001h) ECX features */
+	RTE_CPUFLAG_LAHF_SAHF,              /**< LAHF_SAHF */
+	RTE_CPUFLAG_LZCNT,                  /**< LZCNT */
+
+	/* (EAX 80000001h) EDX features */
+	RTE_CPUFLAG_SYSCALL,                /**< SYSCALL */
+	RTE_CPUFLAG_XD,                     /**< XD */
+	RTE_CPUFLAG_1GB_PG,                 /**< 1GB_PG */
+	RTE_CPUFLAG_RDTSCP,                 /**< RDTSCP */
+	RTE_CPUFLAG_EM64T,                  /**< EM64T */
+
+	/* (EAX 80000007h) EDX features */
+	RTE_CPUFLAG_INVTSC,                 /**< INVTSC */
+
+	/* The last item */
+	RTE_CPUFLAG_NUMFLAGS,               /**< This should always be the last! */
+};
+
+typedef uint32_t cpuid_registers_t[4];
+
+#define CPU_FLAG_NAME_MAX_LEN 64
+
+/**
+ * Struct to hold a processor feature entry
+ */
+struct feature_entry {
+	uint32_t leaf;				/**< cpuid leaf */
+	uint32_t subleaf;			/**< cpuid subleaf */
+	uint32_t reg;				/**< cpuid register */
+	uint32_t bit;				/**< cpuid register bit */
+	char name[CPU_FLAG_NAME_MAX_LEN];       /**< String for printing */
+};
+
+#define FEAT_DEF(name, leaf, subleaf, reg, bit) \
+	[RTE_CPUFLAG_##name] = {leaf, subleaf, reg, bit, #name },
+
+/**
+ * An array that holds feature entries
+ */
+static const struct feature_entry cpu_feature_table[] = {
+	FEAT_DEF(SSE3, 0x00000001, 0, REG_ECX,  0)
+	FEAT_DEF(PCLMULQDQ, 0x00000001, 0, REG_ECX,  1)
+	FEAT_DEF(DTES64, 0x00000001, 0, REG_ECX,  2)
+	FEAT_DEF(MONITOR, 0x00000001, 0, REG_ECX,  3)
+	FEAT_DEF(DS_CPL, 0x00000001, 0, REG_ECX,  4)
+	FEAT_DEF(VMX, 0x00000001, 0, REG_ECX,  5)
+	FEAT_DEF(SMX, 0x00000001, 0, REG_ECX,  6)
+	FEAT_DEF(EIST, 0x00000001, 0, REG_ECX,  7)
+	FEAT_DEF(TM2, 0x00000001, 0, REG_ECX,  8)
+	FEAT_DEF(SSSE3, 0x00000001, 0, REG_ECX,  9)
+	FEAT_DEF(CNXT_ID, 0x00000001, 0, REG_ECX, 10)
+	FEAT_DEF(FMA, 0x00000001, 0, REG_ECX, 12)
+	FEAT_DEF(CMPXCHG16B, 0x00000001, 0, REG_ECX, 13)
+	FEAT_DEF(XTPR, 0x00000001, 0, REG_ECX, 14)
+	FEAT_DEF(PDCM, 0x00000001, 0, REG_ECX, 15)
+	FEAT_DEF(PCID, 0x00000001, 0, REG_ECX, 17)
+	FEAT_DEF(DCA, 0x00000001, 0, REG_ECX, 18)
+	FEAT_DEF(SSE4_1, 0x00000001, 0, REG_ECX, 19)
+	FEAT_DEF(SSE4_2, 0x00000001, 0, REG_ECX, 20)
+	FEAT_DEF(X2APIC, 0x00000001, 0, REG_ECX, 21)
+	FEAT_DEF(MOVBE, 0x00000001, 0, REG_ECX, 22)
+	FEAT_DEF(POPCNT, 0x00000001, 0, REG_ECX, 23)
+	FEAT_DEF(TSC_DEADLINE, 0x00000001, 0, REG_ECX, 24)
+	FEAT_DEF(AES, 0x00000001, 0, REG_ECX, 25)
+	FEAT_DEF(XSAVE, 0x00000001, 0, REG_ECX, 26)
+	FEAT_DEF(OSXSAVE, 0x00000001, 0, REG_ECX, 27)
+	FEAT_DEF(AVX, 0x00000001, 0, REG_ECX, 28)
+	FEAT_DEF(F16C, 0x00000001, 0, REG_ECX, 29)
+	FEAT_DEF(RDRAND, 0x00000001, 0, REG_ECX, 30)
+
+	FEAT_DEF(FPU, 0x00000001, 0, REG_EDX,  0)
+	FEAT_DEF(VME, 0x00000001, 0, REG_EDX,  1)
+	FEAT_DEF(DE, 0x00000001, 0, REG_EDX,  2)
+	FEAT_DEF(PSE, 0x00000001, 0, REG_EDX,  3)
+	FEAT_DEF(TSC, 0x00000001, 0, REG_EDX,  4)
+	FEAT_DEF(MSR, 0x00000001, 0, REG_EDX,  5)
+	FEAT_DEF(PAE, 0x00000001, 0, REG_EDX,  6)
+	FEAT_DEF(MCE, 0x00000001, 0, REG_EDX,  7)
+	FEAT_DEF(CX8, 0x00000001, 0, REG_EDX,  8)
+	FEAT_DEF(APIC, 0x00000001, 0, REG_EDX,  9)
+	FEAT_DEF(SEP, 0x00000001, 0, REG_EDX, 11)
+	FEAT_DEF(MTRR, 0x00000001, 0, REG_EDX, 12)
+	FEAT_DEF(PGE, 0x00000001, 0, REG_EDX, 13)
+	FEAT_DEF(MCA, 0x00000001, 0, REG_EDX, 14)
+	FEAT_DEF(CMOV, 0x00000001, 0, REG_EDX, 15)
+	FEAT_DEF(PAT, 0x00000001, 0, REG_EDX, 16)
+	FEAT_DEF(PSE36, 0x00000001, 0, REG_EDX, 17)
+	FEAT_DEF(PSN, 0x00000001, 0, REG_EDX, 18)
+	FEAT_DEF(CLFSH, 0x00000001, 0, REG_EDX, 19)
+	FEAT_DEF(DS, 0x00000001, 0, REG_EDX, 21)
+	FEAT_DEF(ACPI, 0x00000001, 0, REG_EDX, 22)
+	FEAT_DEF(MMX, 0x00000001, 0, REG_EDX, 23)
+	FEAT_DEF(FXSR, 0x00000001, 0, REG_EDX, 24)
+	FEAT_DEF(SSE, 0x00000001, 0, REG_EDX, 25)
+	FEAT_DEF(SSE2, 0x00000001, 0, REG_EDX, 26)
+	FEAT_DEF(SS, 0x00000001, 0, REG_EDX, 27)
+	FEAT_DEF(HTT, 0x00000001, 0, REG_EDX, 28)
+	FEAT_DEF(TM, 0x00000001, 0, REG_EDX, 29)
+	FEAT_DEF(PBE, 0x00000001, 0, REG_EDX, 31)
+
+	FEAT_DEF(DIGTEMP, 0x00000006, 0, REG_EAX,  0)
+	FEAT_DEF(TRBOBST, 0x00000006, 0, REG_EAX,  1)
+	FEAT_DEF(ARAT, 0x00000006, 0, REG_EAX,  2)
+	FEAT_DEF(PLN, 0x00000006, 0, REG_EAX,  4)
+	FEAT_DEF(ECMD, 0x00000006, 0, REG_EAX,  5)
+	FEAT_DEF(PTM, 0x00000006, 0, REG_EAX,  6)
+
+	FEAT_DEF(MPERF_APERF_MSR, 0x00000006, 0, REG_ECX,  0)
+	FEAT_DEF(ACNT2, 0x00000006, 0, REG_ECX,  1)
+	FEAT_DEF(ENERGY_EFF, 0x00000006, 0, REG_ECX,  3)
+
+	FEAT_DEF(FSGSBASE, 0x00000007, 0, REG_EBX,  0)
+	FEAT_DEF(BMI1, 0x00000007, 0, REG_EBX,  2)
+	FEAT_DEF(HLE, 0x00000007, 0, REG_EBX,  4)
+	FEAT_DEF(AVX2, 0x00000007, 0, REG_EBX,  5)
+	FEAT_DEF(SMEP, 0x00000007, 0, REG_EBX,  6)
+	FEAT_DEF(BMI2, 0x00000007, 0, REG_EBX,  7)
+	FEAT_DEF(ERMS, 0x00000007, 0, REG_EBX,  8)
+	FEAT_DEF(INVPCID, 0x00000007, 0, REG_EBX, 10)
+	FEAT_DEF(RTM, 0x00000007, 0, REG_EBX, 11)
+
+	FEAT_DEF(LAHF_SAHF, 0x80000001, 0, REG_ECX,  0)
+	FEAT_DEF(LZCNT, 0x80000001, 0, REG_ECX,  4)
+
+	FEAT_DEF(SYSCALL, 0x80000001, 0, REG_EDX, 11)
+	FEAT_DEF(XD, 0x80000001, 0, REG_EDX, 20)
+	FEAT_DEF(1GB_PG, 0x80000001, 0, REG_EDX, 26)
+	FEAT_DEF(RDTSCP, 0x80000001, 0, REG_EDX, 27)
+	FEAT_DEF(EM64T, 0x80000001, 0, REG_EDX, 29)
+
+	FEAT_DEF(INVTSC, 0x80000007, 0, REG_EDX,  8)
+};
+
+/*
+ * Execute CPUID instruction and get contents of a specific register
+ *
+ * This function, when compiled with GCC, will generate architecture-neutral
+ * code, as per GCC manual.
+ */
+static inline void
+rte_arch_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out)
+{
+#if defined(__i386__) && defined(__PIC__)
+    /* %ebx is a forbidden register if we compile with -fPIC or -fPIE */
+    asm volatile("movl %%ebx,%0 ; cpuid ; xchgl %%ebx,%0"
+		 : "=r" (out[REG_EBX]),
+		   "=a" (out[REG_EAX]),
+		   "=c" (out[REG_ECX]),
+		   "=d" (out[REG_EDX])
+		 : "a" (leaf), "c" (subleaf));
+#else
+
+    asm volatile("cpuid"
+		 : "=a" (out[REG_EAX]),
+		   "=b" (out[REG_EBX]),
+		   "=c" (out[REG_ECX]),
+		   "=d" (out[REG_EDX])
+		 : "a" (leaf), "c" (subleaf));
+
+#endif
+}
+
+/*
+ * Checks if a particular flag is available on current machine.
+ */
+static inline int
+rte_arch_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
+{
+	const struct feature_entry *feat;
+	cpuid_registers_t regs;
+
+	if (feature >= RTE_CPUFLAG_NUMFLAGS)
+		/* Flag does not match anything in the feature tables */
+		return -ENOENT;
+
+	feat = &cpu_feature_table[feature];
+
+	if (!feat->leaf)
+		/* This entry in the table wasn't filled out! */
+		return -EFAULT;
+
+	rte_arch_cpu_get_features(feat->leaf & 0xffff0000, 0, regs);
+	if (((regs[REG_EAX] ^ feat->leaf) & 0xffff0000) ||
+	      regs[REG_EAX] < feat->leaf)
+		return 0;
+
+	/* get the cpuid leaf containing the desired feature */
+	rte_arch_cpu_get_features(feat->leaf, feat->subleaf, regs);
+
+	/* check if the feature is enabled */
+	return (regs[feat->reg] >> feat->bit) & 1;
+}
+
+#endif /* _RTE_CPUFLAGS_ARCH_H_ */
\ No newline at end of file
diff --git a/lib/librte_eal/common/include/rte_cpuflags.h b/lib/librte_eal/common/include/rte_cpuflags.h
index 5fa96db..4179c61 100644
--- a/lib/librte_eal/common/include/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/rte_cpuflags.h
@@ -43,115 +43,7 @@
 extern "C" {
 #endif
 
-
-/**
- * Enumeration of all CPU features supported
- */
-enum rte_cpu_flag_t {
-	/* (EAX 01h) ECX features*/
-	RTE_CPUFLAG_SSE3 = 0,               /**< SSE3 */
-	RTE_CPUFLAG_PCLMULQDQ,              /**< PCLMULQDQ */
-	RTE_CPUFLAG_DTES64,                 /**< DTES64 */
-	RTE_CPUFLAG_MONITOR,                /**< MONITOR */
-	RTE_CPUFLAG_DS_CPL,                 /**< DS_CPL */
-	RTE_CPUFLAG_VMX,                    /**< VMX */
-	RTE_CPUFLAG_SMX,                    /**< SMX */
-	RTE_CPUFLAG_EIST,                   /**< EIST */
-	RTE_CPUFLAG_TM2,                    /**< TM2 */
-	RTE_CPUFLAG_SSSE3,                  /**< SSSE3 */
-	RTE_CPUFLAG_CNXT_ID,                /**< CNXT_ID */
-	RTE_CPUFLAG_FMA,                    /**< FMA */
-	RTE_CPUFLAG_CMPXCHG16B,             /**< CMPXCHG16B */
-	RTE_CPUFLAG_XTPR,                   /**< XTPR */
-	RTE_CPUFLAG_PDCM,                   /**< PDCM */
-	RTE_CPUFLAG_PCID,                   /**< PCID */
-	RTE_CPUFLAG_DCA,                    /**< DCA */
-	RTE_CPUFLAG_SSE4_1,                 /**< SSE4_1 */
-	RTE_CPUFLAG_SSE4_2,                 /**< SSE4_2 */
-	RTE_CPUFLAG_X2APIC,                 /**< X2APIC */
-	RTE_CPUFLAG_MOVBE,                  /**< MOVBE */
-	RTE_CPUFLAG_POPCNT,                 /**< POPCNT */
-	RTE_CPUFLAG_TSC_DEADLINE,           /**< TSC_DEADLINE */
-	RTE_CPUFLAG_AES,                    /**< AES */
-	RTE_CPUFLAG_XSAVE,                  /**< XSAVE */
-	RTE_CPUFLAG_OSXSAVE,                /**< OSXSAVE */
-	RTE_CPUFLAG_AVX,                    /**< AVX */
-	RTE_CPUFLAG_F16C,                   /**< F16C */
-	RTE_CPUFLAG_RDRAND,                 /**< RDRAND */
-
-	/* (EAX 01h) EDX features */
-	RTE_CPUFLAG_FPU,                    /**< FPU */
-	RTE_CPUFLAG_VME,                    /**< VME */
-	RTE_CPUFLAG_DE,                     /**< DE */
-	RTE_CPUFLAG_PSE,                    /**< PSE */
-	RTE_CPUFLAG_TSC,                    /**< TSC */
-	RTE_CPUFLAG_MSR,                    /**< MSR */
-	RTE_CPUFLAG_PAE,                    /**< PAE */
-	RTE_CPUFLAG_MCE,                    /**< MCE */
-	RTE_CPUFLAG_CX8,                    /**< CX8 */
-	RTE_CPUFLAG_APIC,                   /**< APIC */
-	RTE_CPUFLAG_SEP,                    /**< SEP */
-	RTE_CPUFLAG_MTRR,                   /**< MTRR */
-	RTE_CPUFLAG_PGE,                    /**< PGE */
-	RTE_CPUFLAG_MCA,                    /**< MCA */
-	RTE_CPUFLAG_CMOV,                   /**< CMOV */
-	RTE_CPUFLAG_PAT,                    /**< PAT */
-	RTE_CPUFLAG_PSE36,                  /**< PSE36 */
-	RTE_CPUFLAG_PSN,                    /**< PSN */
-	RTE_CPUFLAG_CLFSH,                  /**< CLFSH */
-	RTE_CPUFLAG_DS,                     /**< DS */
-	RTE_CPUFLAG_ACPI,                   /**< ACPI */
-	RTE_CPUFLAG_MMX,                    /**< MMX */
-	RTE_CPUFLAG_FXSR,                   /**< FXSR */
-	RTE_CPUFLAG_SSE,                    /**< SSE */
-	RTE_CPUFLAG_SSE2,                   /**< SSE2 */
-	RTE_CPUFLAG_SS,                     /**< SS */
-	RTE_CPUFLAG_HTT,                    /**< HTT */
-	RTE_CPUFLAG_TM,                     /**< TM */
-	RTE_CPUFLAG_PBE,                    /**< PBE */
-
-	/* (EAX 06h) EAX features */
-	RTE_CPUFLAG_DIGTEMP,                /**< DIGTEMP */
-	RTE_CPUFLAG_TRBOBST,                /**< TRBOBST */
-	RTE_CPUFLAG_ARAT,                   /**< ARAT */
-	RTE_CPUFLAG_PLN,                    /**< PLN */
-	RTE_CPUFLAG_ECMD,                   /**< ECMD */
-	RTE_CPUFLAG_PTM,                    /**< PTM */
-
-	/* (EAX 06h) ECX features */
-	RTE_CPUFLAG_MPERF_APERF_MSR,        /**< MPERF_APERF_MSR */
-	RTE_CPUFLAG_ACNT2,                  /**< ACNT2 */
-	RTE_CPUFLAG_ENERGY_EFF,             /**< ENERGY_EFF */
-
-	/* (EAX 07h, ECX 0h) EBX features */
-	RTE_CPUFLAG_FSGSBASE,               /**< FSGSBASE */
-	RTE_CPUFLAG_BMI1,                   /**< BMI1 */
-	RTE_CPUFLAG_HLE,                    /**< Hardware Lock elision */
-	RTE_CPUFLAG_AVX2,                   /**< AVX2 */
-	RTE_CPUFLAG_SMEP,                   /**< SMEP */
-	RTE_CPUFLAG_BMI2,                   /**< BMI2 */
-	RTE_CPUFLAG_ERMS,                   /**< ERMS */
-	RTE_CPUFLAG_INVPCID,                /**< INVPCID */
-	RTE_CPUFLAG_RTM,                    /**< Transactional memory */
-
-	/* (EAX 80000001h) ECX features */
-	RTE_CPUFLAG_LAHF_SAHF,              /**< LAHF_SAHF */
-	RTE_CPUFLAG_LZCNT,                  /**< LZCNT */
-
-	/* (EAX 80000001h) EDX features */
-	RTE_CPUFLAG_SYSCALL,                /**< SYSCALL */
-	RTE_CPUFLAG_XD,                     /**< XD */
-	RTE_CPUFLAG_1GB_PG,                 /**< 1GB_PG */
-	RTE_CPUFLAG_RDTSCP,                 /**< RDTSCP */
-	RTE_CPUFLAG_EM64T,                  /**< EM64T */
-
-	/* (EAX 80000007h) EDX features */
-	RTE_CPUFLAG_INVTSC,                 /**< INVTSC */
-
-	/* The last item */
-	RTE_CPUFLAG_NUMFLAGS,               /**< This should always be the last! */
-};
-
+#include "arch/rte_cpuflags_arch.h"
 
 /**
  * Function for checking a CPU flag availability
diff --git a/lib/librte_eal/common/include/x86_64/arch/rte_cpuflags_arch.h b/lib/librte_eal/common/include/x86_64/arch/rte_cpuflags_arch.h
new file mode 100644
index 0000000..b2f078a
--- /dev/null
+++ b/lib/librte_eal/common/include/x86_64/arch/rte_cpuflags_arch.h
@@ -0,0 +1,335 @@
+/*-
+ *   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.
+ */
+
+#ifndef _RTE_CPUFLAGS_ARCH_H_
+#define _RTE_CPUFLAGS_ARCH_H_
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+
+/**
+ * Enumeration of CPU registers
+ */
+enum cpu_register_t {
+	REG_EAX = 0,
+	REG_EBX,
+	REG_ECX,
+	REG_EDX,
+};
+
+/**
+ * Enumeration of all CPU features supported
+ */
+enum rte_cpu_flag_t {
+	/* (EAX 01h) ECX features*/
+	RTE_CPUFLAG_SSE3 = 0,               /**< SSE3 */
+	RTE_CPUFLAG_PCLMULQDQ,              /**< PCLMULQDQ */
+	RTE_CPUFLAG_DTES64,                 /**< DTES64 */
+	RTE_CPUFLAG_MONITOR,                /**< MONITOR */
+	RTE_CPUFLAG_DS_CPL,                 /**< DS_CPL */
+	RTE_CPUFLAG_VMX,                    /**< VMX */
+	RTE_CPUFLAG_SMX,                    /**< SMX */
+	RTE_CPUFLAG_EIST,                   /**< EIST */
+	RTE_CPUFLAG_TM2,                    /**< TM2 */
+	RTE_CPUFLAG_SSSE3,                  /**< SSSE3 */
+	RTE_CPUFLAG_CNXT_ID,                /**< CNXT_ID */
+	RTE_CPUFLAG_FMA,                    /**< FMA */
+	RTE_CPUFLAG_CMPXCHG16B,             /**< CMPXCHG16B */
+	RTE_CPUFLAG_XTPR,                   /**< XTPR */
+	RTE_CPUFLAG_PDCM,                   /**< PDCM */
+	RTE_CPUFLAG_PCID,                   /**< PCID */
+	RTE_CPUFLAG_DCA,                    /**< DCA */
+	RTE_CPUFLAG_SSE4_1,                 /**< SSE4_1 */
+	RTE_CPUFLAG_SSE4_2,                 /**< SSE4_2 */
+	RTE_CPUFLAG_X2APIC,                 /**< X2APIC */
+	RTE_CPUFLAG_MOVBE,                  /**< MOVBE */
+	RTE_CPUFLAG_POPCNT,                 /**< POPCNT */
+	RTE_CPUFLAG_TSC_DEADLINE,           /**< TSC_DEADLINE */
+	RTE_CPUFLAG_AES,                    /**< AES */
+	RTE_CPUFLAG_XSAVE,                  /**< XSAVE */
+	RTE_CPUFLAG_OSXSAVE,                /**< OSXSAVE */
+	RTE_CPUFLAG_AVX,                    /**< AVX */
+	RTE_CPUFLAG_F16C,                   /**< F16C */
+	RTE_CPUFLAG_RDRAND,                 /**< RDRAND */
+
+	/* (EAX 01h) EDX features */
+	RTE_CPUFLAG_FPU,                    /**< FPU */
+	RTE_CPUFLAG_VME,                    /**< VME */
+	RTE_CPUFLAG_DE,                     /**< DE */
+	RTE_CPUFLAG_PSE,                    /**< PSE */
+	RTE_CPUFLAG_TSC,                    /**< TSC */
+	RTE_CPUFLAG_MSR,                    /**< MSR */
+	RTE_CPUFLAG_PAE,                    /**< PAE */
+	RTE_CPUFLAG_MCE,                    /**< MCE */
+	RTE_CPUFLAG_CX8,                    /**< CX8 */
+	RTE_CPUFLAG_APIC,                   /**< APIC */
+	RTE_CPUFLAG_SEP,                    /**< SEP */
+	RTE_CPUFLAG_MTRR,                   /**< MTRR */
+	RTE_CPUFLAG_PGE,                    /**< PGE */
+	RTE_CPUFLAG_MCA,                    /**< MCA */
+	RTE_CPUFLAG_CMOV,                   /**< CMOV */
+	RTE_CPUFLAG_PAT,                    /**< PAT */
+	RTE_CPUFLAG_PSE36,                  /**< PSE36 */
+	RTE_CPUFLAG_PSN,                    /**< PSN */
+	RTE_CPUFLAG_CLFSH,                  /**< CLFSH */
+	RTE_CPUFLAG_DS,                     /**< DS */
+	RTE_CPUFLAG_ACPI,                   /**< ACPI */
+	RTE_CPUFLAG_MMX,                    /**< MMX */
+	RTE_CPUFLAG_FXSR,                   /**< FXSR */
+	RTE_CPUFLAG_SSE,                    /**< SSE */
+	RTE_CPUFLAG_SSE2,                   /**< SSE2 */
+	RTE_CPUFLAG_SS,                     /**< SS */
+	RTE_CPUFLAG_HTT,                    /**< HTT */
+	RTE_CPUFLAG_TM,                     /**< TM */
+	RTE_CPUFLAG_PBE,                    /**< PBE */
+
+	/* (EAX 06h) EAX features */
+	RTE_CPUFLAG_DIGTEMP,                /**< DIGTEMP */
+	RTE_CPUFLAG_TRBOBST,                /**< TRBOBST */
+	RTE_CPUFLAG_ARAT,                   /**< ARAT */
+	RTE_CPUFLAG_PLN,                    /**< PLN */
+	RTE_CPUFLAG_ECMD,                   /**< ECMD */
+	RTE_CPUFLAG_PTM,                    /**< PTM */
+
+	/* (EAX 06h) ECX features */
+	RTE_CPUFLAG_MPERF_APERF_MSR,        /**< MPERF_APERF_MSR */
+	RTE_CPUFLAG_ACNT2,                  /**< ACNT2 */
+	RTE_CPUFLAG_ENERGY_EFF,             /**< ENERGY_EFF */
+
+	/* (EAX 07h, ECX 0h) EBX features */
+	RTE_CPUFLAG_FSGSBASE,               /**< FSGSBASE */
+	RTE_CPUFLAG_BMI1,                   /**< BMI1 */
+	RTE_CPUFLAG_HLE,                    /**< Hardware Lock elision */
+	RTE_CPUFLAG_AVX2,                   /**< AVX2 */
+	RTE_CPUFLAG_SMEP,                   /**< SMEP */
+	RTE_CPUFLAG_BMI2,                   /**< BMI2 */
+	RTE_CPUFLAG_ERMS,                   /**< ERMS */
+	RTE_CPUFLAG_INVPCID,                /**< INVPCID */
+	RTE_CPUFLAG_RTM,                    /**< Transactional memory */
+
+	/* (EAX 80000001h) ECX features */
+	RTE_CPUFLAG_LAHF_SAHF,              /**< LAHF_SAHF */
+	RTE_CPUFLAG_LZCNT,                  /**< LZCNT */
+
+	/* (EAX 80000001h) EDX features */
+	RTE_CPUFLAG_SYSCALL,                /**< SYSCALL */
+	RTE_CPUFLAG_XD,                     /**< XD */
+	RTE_CPUFLAG_1GB_PG,                 /**< 1GB_PG */
+	RTE_CPUFLAG_RDTSCP,                 /**< RDTSCP */
+	RTE_CPUFLAG_EM64T,                  /**< EM64T */
+
+	/* (EAX 80000007h) EDX features */
+	RTE_CPUFLAG_INVTSC,                 /**< INVTSC */
+
+	/* The last item */
+	RTE_CPUFLAG_NUMFLAGS,               /**< This should always be the last! */
+};
+
+typedef uint32_t cpuid_registers_t[4];
+
+#define CPU_FLAG_NAME_MAX_LEN 64
+
+/**
+ * Struct to hold a processor feature entry
+ */
+struct feature_entry {
+	uint32_t leaf;				/**< cpuid leaf */
+	uint32_t subleaf;			/**< cpuid subleaf */
+	uint32_t reg;				/**< cpuid register */
+	uint32_t bit;				/**< cpuid register bit */
+	char name[CPU_FLAG_NAME_MAX_LEN];       /**< String for printing */
+};
+
+#define FEAT_DEF(name, leaf, subleaf, reg, bit) \
+	[RTE_CPUFLAG_##name] = {leaf, subleaf, reg, bit, #name },
+
+/**
+ * An array that holds feature entries
+ */
+static const struct feature_entry cpu_feature_table[] = {
+	FEAT_DEF(SSE3, 0x00000001, 0, REG_ECX,  0)
+	FEAT_DEF(PCLMULQDQ, 0x00000001, 0, REG_ECX,  1)
+	FEAT_DEF(DTES64, 0x00000001, 0, REG_ECX,  2)
+	FEAT_DEF(MONITOR, 0x00000001, 0, REG_ECX,  3)
+	FEAT_DEF(DS_CPL, 0x00000001, 0, REG_ECX,  4)
+	FEAT_DEF(VMX, 0x00000001, 0, REG_ECX,  5)
+	FEAT_DEF(SMX, 0x00000001, 0, REG_ECX,  6)
+	FEAT_DEF(EIST, 0x00000001, 0, REG_ECX,  7)
+	FEAT_DEF(TM2, 0x00000001, 0, REG_ECX,  8)
+	FEAT_DEF(SSSE3, 0x00000001, 0, REG_ECX,  9)
+	FEAT_DEF(CNXT_ID, 0x00000001, 0, REG_ECX, 10)
+	FEAT_DEF(FMA, 0x00000001, 0, REG_ECX, 12)
+	FEAT_DEF(CMPXCHG16B, 0x00000001, 0, REG_ECX, 13)
+	FEAT_DEF(XTPR, 0x00000001, 0, REG_ECX, 14)
+	FEAT_DEF(PDCM, 0x00000001, 0, REG_ECX, 15)
+	FEAT_DEF(PCID, 0x00000001, 0, REG_ECX, 17)
+	FEAT_DEF(DCA, 0x00000001, 0, REG_ECX, 18)
+	FEAT_DEF(SSE4_1, 0x00000001, 0, REG_ECX, 19)
+	FEAT_DEF(SSE4_2, 0x00000001, 0, REG_ECX, 20)
+	FEAT_DEF(X2APIC, 0x00000001, 0, REG_ECX, 21)
+	FEAT_DEF(MOVBE, 0x00000001, 0, REG_ECX, 22)
+	FEAT_DEF(POPCNT, 0x00000001, 0, REG_ECX, 23)
+	FEAT_DEF(TSC_DEADLINE, 0x00000001, 0, REG_ECX, 24)
+	FEAT_DEF(AES, 0x00000001, 0, REG_ECX, 25)
+	FEAT_DEF(XSAVE, 0x00000001, 0, REG_ECX, 26)
+	FEAT_DEF(OSXSAVE, 0x00000001, 0, REG_ECX, 27)
+	FEAT_DEF(AVX, 0x00000001, 0, REG_ECX, 28)
+	FEAT_DEF(F16C, 0x00000001, 0, REG_ECX, 29)
+	FEAT_DEF(RDRAND, 0x00000001, 0, REG_ECX, 30)
+
+	FEAT_DEF(FPU, 0x00000001, 0, REG_EDX,  0)
+	FEAT_DEF(VME, 0x00000001, 0, REG_EDX,  1)
+	FEAT_DEF(DE, 0x00000001, 0, REG_EDX,  2)
+	FEAT_DEF(PSE, 0x00000001, 0, REG_EDX,  3)
+	FEAT_DEF(TSC, 0x00000001, 0, REG_EDX,  4)
+	FEAT_DEF(MSR, 0x00000001, 0, REG_EDX,  5)
+	FEAT_DEF(PAE, 0x00000001, 0, REG_EDX,  6)
+	FEAT_DEF(MCE, 0x00000001, 0, REG_EDX,  7)
+	FEAT_DEF(CX8, 0x00000001, 0, REG_EDX,  8)
+	FEAT_DEF(APIC, 0x00000001, 0, REG_EDX,  9)
+	FEAT_DEF(SEP, 0x00000001, 0, REG_EDX, 11)
+	FEAT_DEF(MTRR, 0x00000001, 0, REG_EDX, 12)
+	FEAT_DEF(PGE, 0x00000001, 0, REG_EDX, 13)
+	FEAT_DEF(MCA, 0x00000001, 0, REG_EDX, 14)
+	FEAT_DEF(CMOV, 0x00000001, 0, REG_EDX, 15)
+	FEAT_DEF(PAT, 0x00000001, 0, REG_EDX, 16)
+	FEAT_DEF(PSE36, 0x00000001, 0, REG_EDX, 17)
+	FEAT_DEF(PSN, 0x00000001, 0, REG_EDX, 18)
+	FEAT_DEF(CLFSH, 0x00000001, 0, REG_EDX, 19)
+	FEAT_DEF(DS, 0x00000001, 0, REG_EDX, 21)
+	FEAT_DEF(ACPI, 0x00000001, 0, REG_EDX, 22)
+	FEAT_DEF(MMX, 0x00000001, 0, REG_EDX, 23)
+	FEAT_DEF(FXSR, 0x00000001, 0, REG_EDX, 24)
+	FEAT_DEF(SSE, 0x00000001, 0, REG_EDX, 25)
+	FEAT_DEF(SSE2, 0x00000001, 0, REG_EDX, 26)
+	FEAT_DEF(SS, 0x00000001, 0, REG_EDX, 27)
+	FEAT_DEF(HTT, 0x00000001, 0, REG_EDX, 28)
+	FEAT_DEF(TM, 0x00000001, 0, REG_EDX, 29)
+	FEAT_DEF(PBE, 0x00000001, 0, REG_EDX, 31)
+
+	FEAT_DEF(DIGTEMP, 0x00000006, 0, REG_EAX,  0)
+	FEAT_DEF(TRBOBST, 0x00000006, 0, REG_EAX,  1)
+	FEAT_DEF(ARAT, 0x00000006, 0, REG_EAX,  2)
+	FEAT_DEF(PLN, 0x00000006, 0, REG_EAX,  4)
+	FEAT_DEF(ECMD, 0x00000006, 0, REG_EAX,  5)
+	FEAT_DEF(PTM, 0x00000006, 0, REG_EAX,  6)
+
+	FEAT_DEF(MPERF_APERF_MSR, 0x00000006, 0, REG_ECX,  0)
+	FEAT_DEF(ACNT2, 0x00000006, 0, REG_ECX,  1)
+	FEAT_DEF(ENERGY_EFF, 0x00000006, 0, REG_ECX,  3)
+
+	FEAT_DEF(FSGSBASE, 0x00000007, 0, REG_EBX,  0)
+	FEAT_DEF(BMI1, 0x00000007, 0, REG_EBX,  2)
+	FEAT_DEF(HLE, 0x00000007, 0, REG_EBX,  4)
+	FEAT_DEF(AVX2, 0x00000007, 0, REG_EBX,  5)
+	FEAT_DEF(SMEP, 0x00000007, 0, REG_EBX,  6)
+	FEAT_DEF(BMI2, 0x00000007, 0, REG_EBX,  7)
+	FEAT_DEF(ERMS, 0x00000007, 0, REG_EBX,  8)
+	FEAT_DEF(INVPCID, 0x00000007, 0, REG_EBX, 10)
+	FEAT_DEF(RTM, 0x00000007, 0, REG_EBX, 11)
+
+	FEAT_DEF(LAHF_SAHF, 0x80000001, 0, REG_ECX,  0)
+	FEAT_DEF(LZCNT, 0x80000001, 0, REG_ECX,  4)
+
+	FEAT_DEF(SYSCALL, 0x80000001, 0, REG_EDX, 11)
+	FEAT_DEF(XD, 0x80000001, 0, REG_EDX, 20)
+	FEAT_DEF(1GB_PG, 0x80000001, 0, REG_EDX, 26)
+	FEAT_DEF(RDTSCP, 0x80000001, 0, REG_EDX, 27)
+	FEAT_DEF(EM64T, 0x80000001, 0, REG_EDX, 29)
+
+	FEAT_DEF(INVTSC, 0x80000007, 0, REG_EDX,  8)
+};
+
+/*
+ * Execute CPUID instruction and get contents of a specific register
+ *
+ * This function, when compiled with GCC, will generate architecture-neutral
+ * code, as per GCC manual.
+ */
+static inline void
+rte_arch_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out)
+{
+#if defined(__i386__) && defined(__PIC__)
+    /* %ebx is a forbidden register if we compile with -fPIC or -fPIE */
+    asm volatile("movl %%ebx,%0 ; cpuid ; xchgl %%ebx,%0"
+		 : "=r" (out[REG_EBX]),
+		   "=a" (out[REG_EAX]),
+		   "=c" (out[REG_ECX]),
+		   "=d" (out[REG_EDX])
+		 : "a" (leaf), "c" (subleaf));
+#else
+
+    asm volatile("cpuid"
+		 : "=a" (out[REG_EAX]),
+		   "=b" (out[REG_EBX]),
+		   "=c" (out[REG_ECX]),
+		   "=d" (out[REG_EDX])
+		 : "a" (leaf), "c" (subleaf));
+
+#endif
+}
+
+/*
+ * Checks if a particular flag is available on current machine.
+ */
+static inline int
+rte_arch_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
+{
+	const struct feature_entry *feat;
+	cpuid_registers_t regs;
+
+	if (feature >= RTE_CPUFLAG_NUMFLAGS)
+		/* Flag does not match anything in the feature tables */
+		return -ENOENT;
+
+	feat = &cpu_feature_table[feature];
+
+	if (!feat->leaf)
+		/* This entry in the table wasn't filled out! */
+		return -EFAULT;
+
+	rte_arch_cpu_get_features(feat->leaf & 0xffff0000, 0, regs);
+	if (((regs[REG_EAX] ^ feat->leaf) & 0xffff0000) ||
+	      regs[REG_EAX] < feat->leaf)
+		return 0;
+
+	/* get the cpuid leaf containing the desired feature */
+	rte_arch_cpu_get_features(feat->leaf, feat->subleaf, regs);
+
+	/* check if the feature is enabled */
+	return (regs[feat->reg] >> feat->bit) & 1;
+}
+
+#endif /* _RTE_CPUFLAGS_ARCH_H_ */
\ No newline at end of file
-- 
1.7.1



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