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Re: [PATCH v1] intel_iommu: fix bug to read DMAR_RTADDR_REG
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From: |
Peter Xu |
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Subject: |
Re: [PATCH v1] intel_iommu: fix bug to read DMAR_RTADDR_REG |
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Date: |
Thu, 5 Dec 2019 08:33:24 -0500 |
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User-agent: |
Mutt/1.11.4 (2019-03-13) |
On Thu, Dec 05, 2019 at 05:54:39PM +0800, Yi Sun wrote:
> Should directly read DMAR_RTADDR_REG but not using 's->root'.
> Because 's->root' is modified in 'vtd_root_table_setup()' so
> that the first 12 bits are omitted. This causes the guest
> iommu debugfs cannot show pasid tables.
>
> Signed-off-by: Yi Sun <address@hidden>
Reviewed-by: Peter Xu <address@hidden>
--
Peter Xu