Messages in this thread | | | Subject | Re: [PATCH 0/6] Replace private domain with per-group default | From | Lu Baolu <> | Date | Wed, 11 Mar 2020 14:50:39 +0800 |
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Hi Joerg,
On 2020/3/10 19:15, Joerg Roedel wrote: > Hi Baolu, > > On Sat, Mar 07, 2020 at 02:20:08PM +0800, Lu Baolu wrote: >> Lu Baolu (5): >> iommu: Configure default domain with dev_def_domain_type >> iommu/vt-d: Don't force 32bit devices to uses DMA domain >> iommu/vt-d: Don't force PCI sub-hierarchy to use DMA domain >> iommu/vt-d: Add dev_def_domain_type callback >> iommu/vt-d: Apply per-device dma_ops >> >> Sai Praneeth Prakhya (1): >> iommu: Add dev_def_domain_type() callback in iommu_ops > > I like this patch-set, but I fear some regressions from patch > "iommu/vt-d: Don't force 32bit devices to uses DMA domain". Have you > tested this series on a couple of machines, ideally even older ones from > the first generation of VT-d hardware?
The oldest hardware I have is Ivy Bridge. :-) Actually, The effect of using identity domain for 32-bit devices is the same as that of adding intel_iommu=off in the kernel parameter. Hence, if there is any regression, people should also find it with intel_iommu=off. intel_iommu=off support is added at the very beginning of VT-d driver.
Best regards, baolu
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