i386/113133: Add PDCM bit name to CPU Features2
Pankov Pavel
pankov_p at mail.ru
Tue May 29 17:50:04 UTC 2007
>Number: 113133
>Category: i386
>Synopsis: Add PDCM bit name to CPU Features2
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: update
>Submitter-Id: current-users
>Arrival-Date: Tue May 29 17:50:03 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: Pankov Pavel
>Release: 6.0-RELEASE-p4
>Organization:
MPEI
>Environment:
FreeBSD pankovpv.sovietservers.com 6.0-RELEASE-p4 FreeBSD 6.0-RELEASE-p4 #8: Mon Feb 27 09:09:25 MSK 2006 root at CRYO.SOVIETSERVERS.COM:/usr/obj/usr/src/sys/CRYO i386
>Description:
According to "Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 2A: Instruction Set Reference, A-M" (http://developer.intel.com/design/processor/manuals/253666.pdf) the PDCM bit name in extended CPU features displaying code in -CURRENT is missing. Attached patch fixes it. This bit is set, for example, in my Core 2 Duo T5600.
Also, RELENG_6 lacks names for SMX, SSSE3, xTPR, PDCM bits. I think they can be MFC'd safely and easily.
>How-To-Repeat:
Boot on the CPU that has highlighted bits set.
>Fix:
Apply the attached patch to -CURRENT (can also be downloaded here: http://www.pankov.pp.ru/patches/identcpu-PDCM.diff).
Patch attached with submission follows:
Index: i386/i386/identcpu.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/identcpu.c,v
retrieving revision 1.177
diff -u -r1.177 identcpu.c
--- i386/i386/identcpu.c 18 Apr 2007 10:08:24 -0000 1.177
+++ i386/i386/identcpu.c 29 May 2007 17:06:50 -0000
@@ -750,7 +750,7 @@
"\015<b12>"
"\016CX16" /* CMPXCHG16B Instruction */
"\017xTPR" /* Send Task Priority Messages*/
- "\020<b15>"
+ "\020PDCM" /* Perf/Debug Capability MSR */
"\021<b16>"
"\022<b17>"
"\023DCA" /* Direct Cache Access */
>Release-Note:
>Audit-Trail:
>Unformatted:
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