AMD处理器是支持rdmsr（read model-specific register）和wrmsr（write model-specific register）命令的。这些命令用于读写CPU模型特定寄存器，以获取有关处理器性能的信息。

以下是在Linux系统下使用rdmsr命令获取CPU温度和功耗信息的示例代码：

#include 
#include 
#include 
#include 
#include 
#include 
#include 

#define MSR_TEMPERATURE_TARGET   0x1a2
#define MSR_RAPL_POWER_UNIT      0x606
#define MSR_PKG_ENERGY_STATUS    0x611
#define MSR_DRAM_ENERGY_STATUS   0x619
#define MSR_PP0_ENERGY_STATUS    0x639

static inline uint64_t read_msr(int fd, uint32_t reg) {
    uint64_t data = 0;
    if (pread(fd, &data, sizeof data, reg) != sizeof data) {
        return 0;  // Failed to read
    }
    return data;
}

int main() {
    int fd = open("/dev/cpu/0/msr", O_RDONLY);
    if (fd < 0) {
        perror("open");
        exit(EXIT_FAILURE);
    }

    // 获取功率单位
    uint64_t power_unit = read_msr(fd, MSR_RAPL_POWER_UNIT);
    double energy_unit = 1.0 / (1 << (power_unit & 0xf));

    // 获取CPU温度
    uint64_t temperature_target = read_msr(fd, MSR_TEMPERATURE_TARGET);
    uint64_t temperature = (temperature_target >> 16) & 0xff;
    printf("CPU temperature: %ldC\n", temperature);

    // 获取CPU能耗
    uint64_t pkg_energy = read_msr(fd, MSR_PKG_ENERGY_STATUS);
    printf("CPU energy: %lfJ\n", pkg_energy * energy_unit);

    close(fd);
    return 0;
}

示例代码中使用了open系统调用打开/dev/cpu/0/msr文件来访问MSR