10208 Add x86 features for L1TF

*** 30,40 ****
   */
  /*
   * Portions Copyright 2009 Advanced Micro Devices, Inc.
   */
  /*
!  * Copyright 2018 Joyent, Inc.
   */
  /*
   * Various routines to handle identification
   * and classification of x86 processors.
   */
--- 30,40 ----
   */
  /*
   * Portions Copyright 2009 Advanced Micro Devices, Inc.
   */
  /*
!  * Copyright (c) 2019, Joyent, Inc.
   */
  /*
   * Various routines to handle identification
   * and classification of x86 processors.
   */
*** 215,225 ****
          "ssbd_virt",
          "rdcl_no",
          "ibrs_all",
          "rsba",
          "ssb_no",
!         "stibp_all"
  };
  
  boolean_t
  is_x86_feature(void *featureset, uint_t feature)
  {
--- 215,227 ----
          "ssbd_virt",
          "rdcl_no",
          "ibrs_all",
          "rsba",
          "ssb_no",
!         "stibp_all",
!         "flush_cmd",
!         "l1d_vmentry_no"
  };
  
  boolean_t
  is_x86_feature(void *featureset, uint_t feature)
  {
*** 1049,1058 ****
--- 1051,1064 ----
                                  }
                                  if (reg & IA32_ARCH_CAP_RSBA) {
                                          add_x86_feature(featureset,
                                              X86FSET_RSBA);
                                  }
+                                 if (reg & IA32_ARCH_CAP_SKIP_L1DFL_VMENTRY) {
+                                         add_x86_feature(featureset,
+                                             X86FSET_L1D_VM_NO);
+                                 }
                                  if (reg & IA32_ARCH_CAP_SSB_NO) {
                                          add_x86_feature(featureset,
                                              X86FSET_SSB_NO);
                                  }
                          }
*** 1060,1069 ****
--- 1066,1078 ----
                  }
  #endif  /* !__xpv */
  
                  if (ecp->cp_edx & CPUID_INTC_EDX_7_0_SSBD)
                          add_x86_feature(featureset, X86FSET_SSBD);
+ 
+                 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_FLUSH_CMD)
+                         add_x86_feature(featureset, X86FSET_FLUSH_CMD);
          }
  }
  
  /*
   * Setup XFeature_Enabled_Mask register. Required by xsave feature.