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Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer

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On 07/27/17 at 05:57pm, Joerg Roedel wrote:
> On Fri, Jul 21, 2017 at 04:59:09PM +0800, Baoquan He wrote:
> > When iommu is pre_enabled in kdump kernel, if a device is set up with
> > guest translations (DTE.GV=1), then don't copy GCR3 table root pointer
> > but move the device over to an empty guest-cr3 table and handle the
> > faults in the PPR log (which answer them with INVALID). After all these
> > PPR faults are recoverable for the device and we should not allow the
> > device to change old-kernels data when we don't have to.
> 
> Okay, forget my previous comment about disabling IOMMUv2 features while
> copying. Its done in this patch.

Yeah, as you said. Thanks.

> 

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[PATCH v8 00/13] Fix the on-flight DMA issue on system with amd iommu Baoquan He <bhe@redhat.com> - 2017-07-21 11:00 +0200
  [PATCH v8 05/13] iommu/amd: Add function copy_dev_tables() Baoquan He <bhe@redhat.com> - 2017-07-21 11:00 +0200
    Re: [PATCH v8 05/13] iommu/amd: Add function copy_dev_tables() Joerg Roedel <jroedel@suse.de> - 2017-07-27 17:30 +0200
      Re: [PATCH v8 05/13] iommu/amd: Add function copy_dev_tables() Baoquan He <bhe@redhat.com> - 2017-07-28 06:00 +0200
  [PATCH v8 06/13] iommu/amd: copy old trans table from old kernel Baoquan He <bhe@redhat.com> - 2017-07-21 11:00 +0200
    Re: [PATCH v8 06/13] iommu/amd: copy old trans table from old kernel Joerg Roedel <jroedel@suse.de> - 2017-07-27 17:40 +0200
      Re: [PATCH v8 06/13] iommu/amd: copy old trans table from old kernel Baoquan He <bhe@redhat.com> - 2017-07-28 09:00 +0200
  [PATCH v8 12/13] iommu/amd: Clear out the GV flag when handle deferred domain attach Baoquan He <bhe@redhat.com> - 2017-07-21 11:10 +0200
  [PATCH v8 07/13] iommu/amd: Do sanity check for irq remap of old dev table entry Baoquan He <bhe@redhat.com> - 2017-07-21 11:10 +0200
  [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer Baoquan He <bhe@redhat.com> - 2017-07-21 11:10 +0200
    Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer Baoquan He <bhe@redhat.com> - 2017-07-24 02:00 +0200
    Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer Joerg Roedel <jroedel@suse.de> - 2017-07-27 18:00 +0200
      Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer Baoquan He <bhe@redhat.com> - 2017-07-28 11:10 +0200
  [PATCH v8 09/13] iommu/amd: Use is_attach_deferred call-back Baoquan He <bhe@redhat.com> - 2017-07-21 11:10 +0200
    Re: [PATCH v8 09/13] iommu/amd: Use is_attach_deferred call-back Joerg Roedel <jroedel@suse.de> - 2017-07-27 18:00 +0200
      Re: [PATCH v8 09/13] iommu/amd: Use is_attach_deferred call-back Baoquan He <bhe@redhat.com> - 2017-07-28 06:10 +0200
  [PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu=off is specified Baoquan He <bhe@redhat.com> - 2017-07-21 11:10 +0200
    Re: [PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu=off  is specified Joerg Roedel <jroedel@suse.de> - 2017-07-27 18:00 +0200
      Re: [PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu=off  is specified Baoquan He <bhe@redhat.com> - 2017-07-28 11:10 +0200

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