相应的代码driver/base/cpu.c中

static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL);
static DEVICE_ATTR(spectre_v1, 0444, cpu_show_spectre_v1, NULL);
static DEVICE_ATTR(spectre_v2, 0444, cpu_show_spectre_v2, NULL);
static DEVICE_ATTR(spec_store_bypass, 0444, cpu_show_spec_store_bypass, NULL);
static DEVICE_ATTR(l1tf, 0444, cpu_show_l1tf, NULL);
static DEVICE_ATTR(mds, 0444, cpu_show_mds, NULL);
static DEVICE_ATTR(tsx_async_abort, 0444, cpu_show_tsx_async_abort, NULL);
static DEVICE_ATTR(itlb_multihit, 0444, cpu_show_itlb_multihit, NULL);
static DEVICE_ATTR(srbds, 0444, cpu_show_srbds, NULL);

这几种的详情介绍见kernel文档/root/linux/Documentation/admin-guide/hw-vuln

 Kernel status:

  ====================================  =================================
  'Not affected'                        The processor is not vulnerable
  'Vulnerable'                          Vulnerable, no mitigation
  'Mitigation: Full generic retpoline'  Software-focused mitigation
  'Mitigation: Full AMD retpoline'      AMD-specific software mitigation
  'Mitigation: Enhanced IBRS'           Hardware-focused mitigation