Re: Intel hyper-threading security issues

[Gordon Tetlow <gordon () tetlows org>]

On Thu, Jun 21, 2018 at 4:58 AM, Georgi Guninski <guninski () guninski com> wrote:
> On Thu, Jun 21, 2018 at 07:56:42AM +0300, Georgi Guninski wrote:
> > V.   Solution
> >
> > Disable Hyper-Threading Technology on processors that support it.
>
> Is Freebsd safe from this or requires patch?

FreeBSD allows disabling of HT processors if the user decides to do so.

Add to /boot/loader.conf:
machdep.hyperthreading_allowed=0

And reboot the host.

Please note this isn't an endorsement of disabling HT, just an
explanation of how to do so on FreeBSD.

Gordon