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--- a/open_issues/64-bit_port.mdwn
+++ b/open_issues/64-bit_port.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2012 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -10,7 +10,11 @@ License|/fdl]]."]]"""]]
[[!tag open_issue_gnumach open_issue_mig]]
-IRC, freenode, #hurd, 2011-10-16:
+There is a `master-x86_64` GNU Mach branch. As of 2012-11-20, it only supports
+the [[microkernel/mach/gnumach/ports/Xen]] platform.
+
+
+# IRC, freenode, #hurd, 2011-10-16
<youpi> it'd be really good to have a 64bit kernel, no need to care about
addressing space :)
@@ -34,3 +38,22 @@ IRC, freenode, #hurd, 2011-10-16:
<youpi> and it'd boost userland addrespace to 4GiB
<braunr> yes
<youpi> leaving time for a 64bit userland :)
+
+
+# IRC, freenode, #hurd, 2012-10-03
+
+ <braunr> youpi: just so you know in case you try the master-x86_64 with
+ grub
+ <braunr> youpi: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689509
+ <youpi> ok, thx
+ <braunr> the squeeze version is fine but i had to patch the wheezy/sid one
+ <youpi> I actually hadn't hoped to boot into 64bit directly from grub
+ <braunr> youpi: there is code in viengoos that could be reused
+ <braunr> i've been thinking about it for a time now
+ <youpi> ok
+ <braunr> the two easiest ways are 1/ the viengoos one (a -m32 object file
+ converted with objcopy as an embedded loader)
+ <braunr> and 2/ establishing an identity mapping using 4x1 GB large pages
+ and switching to long mode, then jumping to c code to complete the
+ initialization
+ <braunr> i think i'll go the second way with x15, so you'll have the two :)