Messages in this thread | | | Subject | Re: [patch 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect | From | Rasmus Villemoes <> | Date | Fri, 3 Apr 2020 01:42:33 +0200 |
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On 02/04/2020 14.32, Thomas Gleixner wrote: > From: Peter Zijlstra <peterz@infradead.org> > > It turns out that with Split-Lock-Detect enabled (default) any VMX > hypervisor needs at least a little modification in order to not blindly > inject the #AC into the guest without the guest being ready for it. > > Since there is no telling which module implements a hypervisor, scan the > module text and look for the VMLAUNCH instruction. If found, the module is > assumed to be a hypervisor of some sort and SLD is disabled.
How long does that scan take/add to module load time? Would it make sense to exempt in-tree modules?
Rasmus
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