Re: [patch v2 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect

[Peter Zijlstra]

Learn to trim your replies already!

On Fri, Apr 03, 2020 at 12:20:08AM +0800, Xiaoyao Li wrote:
> On 4/2/2020 11:23 PM, Peter Zijlstra wrote:

> > +bad_module:
> > +	pr_warn("disabled due to VMX in module: %s\n", me->name);
> > +	sld_state = sld_off;
> 
> shouldn't we remove the __ro_after_init of sld_state?

Oh, that's probably a good idea. I can't actually test this due to no
hardware.

> And, shouldn't we clear X86_FEATURE_SPLIT_LOCK_DETECT flag?

Don't think you can do that this late. Also, the hardware has the MSR
and it works, it's just that we should not.