rte_cpuflags.h File Reference

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	feature_entry

Functions
static void	rte_cpu_get_features (uint32_t leaf, uint32_t subleaf, cpuid_registers_t out)
static int	rte_cpu_get_flag_enabled (enum rte_cpu_flag_t feature)
void	rte_cpu_check_supported (void)

Variables
static struct feature_entry	cpu_feature_table []

Detailed Description

Architecture specific API to determine available CPU features at runtime.

Definition in file rte_cpuflags.h.

Function Documentation

static void rte_cpu_get_features ( uint32_t  leaf, uint32_t  subleaf, cpuid_registers_t  out  )

inlinestatic

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 int rte_cpu_get_flag_enabled ( enum rte_cpu_flag_t  feature )

inlinestatic

Function for checking a CPU flag availability

Parameters

feature

CPU flag to query CPU for

Returns

1 if flag is available 0 if flag is not available -ENOENT if flag is invalid

void rte_cpu_check_supported

(

void

)

This function checks that the currently used CPU supports the CPU features that were specified at compile time. It is called automatically within the EAL, so does not need to be used by applications.

Variable Documentation

struct feature_entry cpu_feature_table[]

static

An array that holds feature entries

Defined in arch-specific rte_cpuflags.h.

Definition at line 85 of file rte_cpuflags.h.