Merge tag 'kvm-x86-misc-6.7' of https://github.com/kvm-x86/linux into HEAD

KVM x86 misc changes for 6.7:

 - Add CONFIG_KVM_MAX_NR_VCPUS to allow supporting up to 4096 vCPUs without
   forcing more common use cases to eat the extra memory overhead.

 - Add IBPB and SBPB virtualization support.

 - Fix a bug where restoring a vCPU snapshot that was taken within 1 second of
   creating the original vCPU would cause KVM to try to synchronize the vCPU's
   TSC and thus clobber the correct TSC being set by userspace.

 - Compute guest wall clock using a single TSC read to avoid generating an
   inaccurate time, e.g. if the vCPU is preempted between multiple TSC reads.

 - "Virtualize" HWCR.TscFreqSel to make Linux guests happy, which complain
    about a "Firmware Bug" if the bit isn't set for select F/M/S combos.

 - Don't apply side effects to Hyper-V's synthetic timer on writes from
   userspace to fix an issue where the auto-enable behavior can trigger
   spurious interrupts, i.e. do auto-enabling only for guest writes.

 - Remove an unnecessary kick of all vCPUs when synchronizing the dirty log
   without PML enabled.

 - Advertise "support" for non-serializing FS/GS base MSR writes as appropriate.

 - Use octal notation for file permissions through KVM x86.

 - Fix a handful of typo fixes and warts.

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