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[Xen-devel] HAP Failure with 64Bit Windows 2003


  • To: "Tim Deegan" <Tim.Deegan@xxxxxxxxxxxxx>
  • From: "Huang2, Wei" <Wei.Huang2@xxxxxxx>
  • Date: Fri, 13 Jul 2007 11:45:44 -0500
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 13 Jul 2007 09:43:47 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcfFbUHJIi2RhZHDRWqGwfDR3VgHcw==
  • Thread-topic: HAP Failure with 64Bit Windows 2003

Tim,
 
I found that your small patch (changeset 15291) caused failure with Windows 2003 64Bit and Vista 64Bit under nested paging. It turned out that intercepting CR0 read should not be disabled. Please see the change below. Other guests seem running well.
 
Thanks,
 
-Wei
 
=========
Replace
        vmcb->cr_intercepts &= ~(CR_INTERCEPT_CR0_READ
                                 |CR_INTERCEPT_CR3_READ
                                 |CR_INTERCEPT_CR4_READ);
with
 
        vmcb->cr_intercepts &= ~(CR_INTERCEPT_CR3_READ
                                 |CR_INTERCEPT_CR4_READ);
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