Messages in this thread | | | Subject | Re: [patch 13/16] x86/ldt: Introduce LDT write fault handler | From | Dave Hansen <> | Date | Tue, 12 Dec 2017 12:21:07 -0800 |
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On 12/12/2017 11:21 AM, Thomas Gleixner wrote: > The only critical interaction is the return to user path (user CS/SS) and > we made sure with the LAR touching that these are precached in the CPU > before we go into fragile exit code.
How do we make sure that it _stays_ cached?
Surely there is weird stuff like WBINVD or SMI's that can come at very inconvenient times and wipe it out of the cache.
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