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[Xen-devel] Why call iommu_unmap_page() in set_p2m_entry()?
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] Why call iommu_unmap_page() in set_p2m_entry()? |
| From: | "Han, Weidong" <weidong.han@xxxxxxxxx> |
| Date: | Thu, 13 Mar 2008 21:28:54 +0800 |
| Cc: | wei.wang2@xxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Delivery-date: | Thu, 13 Mar 2008 06:33:16 -0700 |
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| Thread-index: | AciFDi7GK2Xt4JCVQxynB6N3zSTv1w== |
| Thread-topic: | [Xen-devel] Why call iommu_unmap_page() in set_p2m_entry()? |
As my understanding, AMD IOMMU doesn't share its page tables with p2m table. So it needs call iommu_unmap_page() to free pages when shut down or destroy domain. Now iommu_unmap_page() is only called in set_p2m_entry(), I think it won't be executed when shut down or destroy domain. I'm not familiar with AMD IOMMU code, maybe I missed something. Can you explain why do that? Thanks! Randy (Weidong) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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