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From: "Internet Partners, Inc. Tech Support" <support@ipinc.net>
Cc:
Subject: Re: kern/65627: [i386] [patch] store P3 serial number in sysctl
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The following reply was made to PR kern/65627; it has been noted by GNATS.
From: "Internet Partners, Inc. Tech Support" <support@ipinc.net>
To: <bug-followup@FreeBSD.org>, <gavin@ury.york.ac.uk>
Cc:
Subject: Re: kern/65627: [i386] [patch] store P3 serial number in sysctl
Date: Sat, 27 Jan 2007 02:32:15 -0800
Here is this patch updated for the FreeBSD 6.2-RELEASE kernel:
diff -u sys/i386/i386/identcpu.c.orig sys/i386/i386/identcpu.c
--- sys/i386/i386/identcpu.c.orig Tue Aug 8 01:41:34 2006
+++ sys/i386/i386/identcpu.c Sat Jan 27 01:33:18 2007
@@ -89,6 +89,13 @@
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
cpu_model, 0, "Machine model");
+SYSCTL_NODE(_hw, OID_AUTO, cpu0, CTLFLAG_RD,
+ 0, "CPU 0 Information");
+
+static char cpu_serial[32];
+SYSCTL_STRING(_hw_cpu0, OID_AUTO, serial, CTLFLAG_RD,
+ cpu_serial, 0, "CPU serial number");
+
static int hw_clockrate;
SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
&hw_clockrate, 0, "CPU instruction clock rate");
@@ -856,6 +863,21 @@
*/
if (cpu_feature & CPUID_HTT)
htt = (cpu_procinfo & CPUID_HTT_CORES) >>
16;
+ /*
+ * Obtain the serial number if the CPU supports it
+ */
+ if (cpu_feature & CPUID_PSN) {
+ do_cpuid(3, regs);
+ snprintf(cpu_serial,
+ sizeof(cpu_serial),
+ "%04x-%04x-%04x-%04x-%04x-%04x",
+ (cpu_id >> 16), (cpu_id & 0xffff),
+ (regs[3] >> 16), (regs[3] & 0xffff),
+ (regs[2] >> 16), (regs[2] & 0xffff));
+ if (bootverbose)
+ printf("\n Processor Serial Number:
%s",
+ cpu_serial);
+ }
if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
(amd_feature2 & AMDID2_CMP))
cmp = (cpu_procinfo2 & AMDID_CMP_CORES) + 1;
To apply, place patch in /usr/src and run patch < psn.diff
sysctl is hw.cpu0.serial
here is a snippet from booting verbosely with this patch:
CPU: Intel Pentium III (927.11-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x683 Stepping = 3
Features=0x387fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
CMOV,PAT,PSE36,PN,MMX,FXSR,SSE>
Processor Serial Number: 0000-0623-0001-de43-1r2c-6123
real memory = 268435456 (256 MB)
Physical memory chunk(s):
so you can see what it looks like.
Ted