Date: Mon, 18 Jan 2016 13:12:19 -0800 From: Peter Grehan <grehan@freebsd.org> To: James Lodge <James@Lodge.me.uk> Cc: "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Subject: Re: Bhyve - EPT/Real Address Mode - Unrestricted Guest Message-ID: <569D5533.8000000@freebsd.org> In-Reply-To: <VI1PR06MB103704CF6B4F070A60E5C2D5F9C00@VI1PR06MB1037.eurprd06.prod.outlook.com> References: <VI1PR06MB103704CF6B4F070A60E5C2D5F9C00@VI1PR06MB1037.eurprd06.prod.outlook.com>
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Hi James, > Can someone please confirm that having EPT support in the CPU is not > necessarily enough to run Bhyve. I have an Intel Xeon L5520 (Nehalem > family) that supports EPT but when trying to run an VM, receive ... > My understanding is that the L5520 does not have support for > "Unrestricted Guest/Real Address Mode" which was introduce with the > release of the Westmere architecture. Yes, that's correct. > I assume its a non starter without the unrestricted guest feature. Mostly. You'll only be able to run single vCPU FreeBSD guests since they boot directly into 64-bit mode: everything else (including multiple vCPU guests) requires either 16-bit support or 32-bit non-paged protected mode, both of which are only available on Intel with the 'unrestricted guest' feature. later, Peter.
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