9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>

@@ -19,10 +19,12 @@
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2015, Joyent, Inc.
+ *
+ * Copyright 2018 Joyent, Inc.
  */
 
 #ifndef _SYS_CONTROLREGS_H
 #define _SYS_CONTROLREGS_H
 

@@ -106,16 +108,17 @@
 #define CR4_OSXMMEXCPT  0x0400          /* OS unmasked exception support */
                                         /* 0x0800 reserved */
                                         /* 0x1000 reserved */
 #define CR4_VMXE        0x2000
 #define CR4_SMXE        0x4000
+#define CR4_PCIDE       0x20000         /* PCID enable */
 #define CR4_OSXSAVE     0x40000         /* OS xsave/xrestore support    */
 #define CR4_SMEP        0x100000        /* NX for user pages in kernel */
 #define CR4_SMAP        0x200000        /* kernel can't access user pages */
 
 #define FMT_CR4                                         \
-        "\20\26smap\25smep\23osxsav"                    \
+        "\20\26smap\25smep\23osxsav\22pcide"            \
         "\17smxe\16vmxe\13xmme\12fxsr\11pce\10pge"      \
         "\7mce\6pae\5pse\4de\3tsd\2pvi\1vme"
 
 /*
  * Enable the SSE-related control bits to explain to the processor that