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[Xen-bugs] [Bug 1774] New: 'VT-d 1G super page' feature is blocked

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Subject: [Xen-bugs] [Bug 1774] New: 'VT-d 1G super page' feature is blocked
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Date: Thu, 28 Jul 2011 23:53:02 -0700
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           Summary: 'VT-d 1G super page' feature is blocked
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux-2.6
            Status: NEW
          Severity: normal
          Priority: P1
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yongjie.ren@xxxxxxxxx
                CC: yang.z.zhang@xxxxxxxxx, yongjie.ren@xxxxxxxxx,

'VT-d 1G super page' feature is blocked in latest xen-unstable tree (cs:.
It seems that cs# 23247 introduced this issue. I found cs# 23011 in
xen-4.1-testing.hg  is good.
When I add 'sharept=1' in grub and start up domain0, xl dmesg shows: (XEN)
Intel VT-d Shared EPT tables not enabled.

Reproduce steps:
1.add 'sharept=1' and 'hap_1gb=1' in grub (Enable VT-D/EPT 1G hugepage feature)
2.create a guest with 10GB memory
3.xl debug-key D
4.xl dmesg | grep "order: 18" (find the 1GB page number)

Service Arch (ia32/ia32e/IA64): 32e
Guest Arch (ia32/ia32e/IA64): 32e
Guest OS Type (Linux/Windows):Linux

xen-changeset:   23734:42edf1481c57
xen-date:        Fri Jul 22 08:55:19 2011 +0100

pvops git:
commit 25266338a41470a21e9b3974445be09e0640dda7
Author: Jan Beulich <JBeulich@xxxxxxxxxx>
Date:   Tue May 17 11:07:05 2011 +0100

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