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A cautionary XXX comment about seemingly bogus errata checks.

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This commit is contained in:
Poul-Henning Kamp 2008-03-17 09:05:15 +00:00
parent 462302db47
commit 272870cf7b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=177297
1 changed files with 8 additions and 0 deletions
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8
sys/i386/cpufreq/p4tcc.c
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@ -164,6 +164,14 @@ p4tcc_attach(device_t dev)
*/
sc->auto_mode = TRUE;
/*
* XXX: After a cursory glance at various Intel specification
* XXX: updates it seems like these tests for errata is bogus.
* XXX: As far as I can tell, the failure mode is benign, in
* XXX: that cpus with no errata will have their bottom two
* XXX: STPCLK# rates disabled, so rather than waste more time
* XXX: hunting down intel docs, just document it and punt. /phk
*/
switch (cpu_id & 0xff) {
case 0x22:
case 0x24: