FreeBSD mds mitigation.

[Konstantin Belousov]

On Wed, Jul 10, 2019 at 09:06:31AM +0200, damian at damianek.be wrote:
> Hello
> 
> FreeBSD 11.2-RELEASE-p11
> CPU: Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz (2594.05-MHz K8-class CPU)
> 
> sysctl hw.mds_disable was set to 3 (Automatic VERW or Software selection),
> HT disabled in BIOS, and i install manually latest CPU microcode from
> https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/
> 
> I wonder why hw.mds_disable_state shows
> hw.mds_disable_state: software Broadwell
> instead VERW?
> 
> sysctl hw.mds_disable=1 causes hw.mds_disable_state: VERW
> 
> These automatic selection works correctly?
No idea.

How did you installed the microcode ?  Was it loaded ?
Show the dmesg output after the 'cpucontrol -e /dev/cpuctl0'.