From 910b212e90c6f9c57025e1c7b0c08897af787496 Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Thu, 17 Dec 2015 01:23:31 -0500
Subject: docs/hcl/kgpe-d16.texi: note about microcode for 6300/6200 opterons

---
(limited to 'docs/src/hcl/kgpe-d16.texi')

diff --git a/docs/src/hcl/kgpe-d16.texi b/docs/src/hcl/kgpe-d16.texi
index 14782f1..bca1b8b 100644
--- a/docs/src/hcl/kgpe-d16.texi
+++ b/docs/src/hcl/kgpe-d16.texi
@@ -111,14 +111,18 @@ The information here is adapted, from the ASUS website.
 @item
 HyperTransport™ Technology 3.0
 @item
-CPUs supported (not provided by Minifree, yet):
+CPUs supported:
 @itemize
 @item
-AMD Opteron 6100 series (Fam10h. No IOMMU support. @strong{Not} recommended)
+AMD Opteron 6100 series (Fam10h. No IOMMU support. @strong{Not} recommended - old. View errata datasheet here: @uref{http://support.amd.com/TechDocs/41322_10h_Rev_Gd.pdf,http://support.amd.com/TechDocs/41322_10h_Rev_Gd.pdf})
 @item
-AMD Opteron 6200 series (Fam15h, with full IOMMU support in libreboot)
+AMD Opteron 6200 series (bulldozer cores) (Fam15h, with full IOMMU support in libreboot. @strong{highly recommended - fast, and works well without microcode updates, including virtualization})
 @item
-AMD Opteron 6300 series (Fam15h, with full IOMMU support in libreboot. @strong{Recommended}
+AMD Opteron 6300 series (piledriver cores) (Fam15h, with full IOMMU support in libreboot. @strong{AVOID LIKE THE PLAGUE - virtualization is broken without microcode updates}
+@item
+NOTE: 6300 series CPUs have buggy microcode built-in, and libreboot recommends avoiding the updates. The 6200 series CPUs have more reliable microcode.
+Look at this errata datasheet: @uref{http://support.amd.com/TechDocs/48063_15h_Mod_00h-0Fh_Rev_Guide.pdf,http://support.amd.com/TechDocs/48063_15h_Mod_00h-0Fh_Rev_Guide.pdf}
+(see Errata 734 - this is what kills the 6300 series)
 @end itemize
 
 @item
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