On Thu, 01 Jun 2023 17:58:59 -0700, Sean Christopherson wrote:
> Add a "never" option to the nx_huge_pages module param to allow userspace
> to do a one-way hard disabling of the mitigation, and don't create the
> per-VM recovery threads when the mitigation is hard disabled. Letting
> userspace pinky swear that userspace doesn't want to enable NX mitigation
> (without reloading KVM) allows certain use cases to avoid the latency
> problems associated with spawning a kthread for each VM.
>
> [...]
Applied to kvm-x86 mmu. I kept the default as "auto" for now, as that can go on
top and I don't want to introduce that change this late in the cycle. If no one
beats me to the punch (hint, hint ;-) ), I'll post a patch to make "never" the
default for unaffected hosts so that we can discuss/consider that change for 6.6.
Thanks for the reviews!
[1/1] KVM: x86/mmu: Add "never" option to allow sticky disabling of nx_huge_pages
https://github.com/kvm-x86/linux/commit/0b210faf3373
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https://github.com/kvm-x86/linux/tree/fixes
