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author | Mark Johnston <markj@FreeBSD.org> | 2018-08-28 17:14:46 +0000 |
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committer | Mark Johnston <markj@FreeBSD.org> | 2018-08-28 17:14:46 +0000 |
commit | f6a0fd4490a0fac2734b590b88dfcd93fccd6352 (patch) | |
tree | ea1c121771066dea0a769c8fd7017880310667cd /stand | |
parent | 427b88d77eb888fad96ba984ca413a89f30252d7 (diff) | |
download | src-f6a0fd4490a0fac2734b590b88dfcd93fccd6352.tar.gz src-f6a0fd4490a0fac2734b590b88dfcd93fccd6352.zip |
Document the cpu_microcode_* tunables.
Reviewed by: bcr (previous version), kib
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D16923
Notes
Notes:
svn path=/head/; revision=338354
Diffstat (limited to 'stand')
-rw-r--r-- | stand/defaults/loader.conf.5 | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/stand/defaults/loader.conf.5 b/stand/defaults/loader.conf.5 index 57bf45431dad..d46736223e1c 100644 --- a/stand/defaults/loader.conf.5 +++ b/stand/defaults/loader.conf.5 @@ -23,7 +23,7 @@ .\" SUCH DAMAGE. .\" .\" $FreeBSD$ -.Dd March 23, 2018 +.Dd August 28, 2018 .Dt LOADER.CONF 5 .Os .Sh NAME @@ -289,6 +289,29 @@ See the entropy entries in .Pq Dq /boot/entropy The name of the very early boot-time entropy cache file. +.It Va cpu_microcode_load +.Pq Dq NO +If set to +.Dq YES , +the microcode update file specified by +.Va cpu_microcode_name +will be loaded and applied very early during boot. +This provides functionality similar to +.Xr cpucontrol 8 +but ensures that CPU features enabled by microcode updates can be +used by the kernel. +The update will be re-applied automatically when resuming from an +ACPI sleep state. +If the update file contains updates for multiple processor models, +the kernel will search for and extract a matching update. +Currently this setting is supported only on Intel +.Dv i386 +and +.Dv amd64 +processors. +It has no effect on other processor types. +.It Va cpu_microcode_name +A path to a microcode update file. .El .Sh OTHER SETTINGS Other settings that may be used in @@ -319,6 +342,7 @@ machine-specific settings for sites with a common loader.conf. .Sh SEE ALSO .Xr rc.conf 5 , .Xr boot 8 , +.Xr cpucontrol 8 , .Xr loader 8 , .Xr loader.4th 8 .Sh HISTORY |