Rework hypervisor detection.

[jhb]

Summary

Rework virtual machine hypervisor detection.

• Move the existing code to x86/x86/identcpu.c since it is x86-specific.
• If the CPUID2_HV flag is set, assume a hypervisor is present and query the 0x40000000 leaf to determine the hypervisor vendor ID. Export the vendor ID and the highest supported hypervisor CPUID leaf via hv_vendor[] and hv_high variables, respectively. The hv_vendor[] array is also exported via the hw.hv_vendor sysctl.
• Merge the VMWare detection code from tsc.c into the new probe in identcpu.c. Add a VM_GUEST_VMWARE to identify vmware and use that in the TSC code to identify VMWare.

Test Plan

• Booted the patch under bhyve and verified the origin string in dmesg as well as setting of kern.vm_guest and hw.hv_vendor sysctls.

[jhb]

I will also post this to virtualization@ for review. I believe the Hyper-V folks will like this change. We should perhaps add setting of VM_GUEST_HV to this routine as well instead of in the hyperv drivers.

sys/x86/include/vmware.h

31

Jung-uk, this file is purely your code from a change you added to tsc.c. As such, you should choose the license block that goes on this file. Let me know what to use.

[neel]

Looks good.

[delphij]

Looks good to me.

[jhb]

• Whitespace fix.

[jhb]

• Update license for vmware.h per jkim@.

[jkim]

Looks good.

sys/x86/include/vmware.h

31

Please use the standard FreeBSD license (2-clause) with my copyright, i.e.,

Copyright (c) 2011-2014 Jung-uk Kim <[e-mail]>

[jhb]

• De-XXX.

[jhb]

• Merge branch 'master' into vm_guest

[jhb]

Closed by commit rS273800 (authored by @jhb).