[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Patch v11 3/3] vt-d: fix vt-d Device-TLB flush timeout issue (+ crash logic )
+ arm/amd maintainers.. On June 01, 2016 5:05 PM, Xu, Quan <quan.xu@xxxxxxxxx> wrote: > If Device-TLB flush timed out, we hide the target ATS device immediately and > crash the domain owning this ATS device. If impacted domain is hardware > domain, just throw out a warning. > > By hiding the device, we make sure it can't be assigned to any domain any > longer (see device_assigned). DomU (other than Dom0) gets crashed when a device IOTLB flush times out. I suppose that's what you will want on ARM/AMD then too. We need to move up the crash logic , as similar as iommu_map_page() / iommu_unmap_page(). - add the crash logic to iommu_iotlb_flush() / iommu_iotlb_flush_all(). - when IOMMU/MMU share page tables, we need to fix it one by one. -- on amd, we need to add the crash logic to amd_iommu_flush_pages(). -- on intel, we need to add the crash logic to iommu_pte_flush(). -- on arm, we benefit that we add the crash logic to iommu_iotlb_flush(). Taken together, we need to add crash logic to iommu_iotlb_flush() / iommu_iotlb_flush_all() / iommu_pte_flush() / amd_iommu_flush_pages(). Thoughts? Quan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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