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Date:      Mon, 22 Jan 2024 10:36:16 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 276463] UEFI-booted VM limited to 503GB RAM rather than requested 1.5TB
Message-ID:  <bug-276463-27103-u41p81jxrw@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-276463-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-276463-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276463

Peter Grehan <grehan@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |grehan@FreeBSD.org

--- Comment #4 from Peter Grehan <grehan@FreeBSD.org> ---
This is due to memory being detected from CMOS bytes, which limits the maxi=
mum
amount of RAM to 1TB. This appears to be leftover code imported from the
original UDK2014 bhyve EFI code, and was removed in OVMF with this commit:
    https://edk2.groups.io/g/devel/message/80822

The fix would be to use the E820 map instead of CMOS in
Bhyve/PlatformPei/MemDetect.c

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