diff options
| author | Dimitry Andric <dim@cvs.openbsd.org> | 2006-12-21 22:31:08 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@cvs.openbsd.org> | 2006-12-21 22:31:08 +0000 |
| commit | 887485b3231bdbac7613a9368271e056c3362729 (patch) | |
| tree | 5bc9c5c8dc2c47dbfccb41da36ad8e5928726798 /sys/arch/i386 | |
| parent | 7712ca0e12bd8ea8dc479b8bff845218d6b05ead (diff) | |
Quick fix for Core 2 Duo X6800, which reports an invalid setperf MSR,
with the same high and low speed, leading to a divide by zero error.
A more complete fix will be committed later.
Do it now, deraadt@
Diffstat (limited to 'sys/arch/i386')
| -rw-r--r-- | sys/arch/i386/i386/est.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/arch/i386/i386/est.c b/sys/arch/i386/i386/est.c index 81daf530875..51474a989aa 100644 --- a/sys/arch/i386/i386/est.c +++ b/sys/arch/i386/i386/est.c @@ -1,4 +1,4 @@ -/* $OpenBSD: est.c,v 1.25 2006/12/20 17:50:40 gwk Exp $ */ +/* $OpenBSD: est.c,v 1.26 2006/12/21 22:31:07 dim Exp $ */ /* * Copyright (c) 2003 Michael Eriksson. * All rights reserved. @@ -1049,6 +1049,10 @@ est_init(const char *cpu_device, int vendor) } low = MSR2MHZ(est_fqlist->table[est_fqlist->n - 1], bus_clock); high = MSR2MHZ(est_fqlist->table[0], bus_clock); + if (low == high) { + printf(": high and low speed are the same, disabling EST\n"); + return; + } perflevel = (mhz - low) * 100 / (high - low); /* |