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Bug #12917

closed

bhyve should always use Unrestricted Guest

Added by Patrick Mooney almost 2 years ago. Updated almost 2 years ago.

Status:
Closed
Priority:
Normal
Category:
bhyve
Start date:
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
bhyve
Gerrit CR:

Description

Since the Westmere microarchitecture, Intel CPUs have had the capability to run with the "Unrestricted Guest", where VMX guests are able to run in real mode (allowing for guest software such as boot roms). FreeBSD bhyve supported older CPUs by loading the OS directly with helpers such as grub2-bhyve, where the guest is started directly in protected mode. Since illumos bhyve has never shipped any of those helpers, and already enforces availability of Unrestricted Guest mode, we should automatically enable it and removed that complication from bhyve.

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