Messages in this thread | | | Subject | Re: [PATCH v2 19/24] vdpa: make sure set_features in invoked for legacy | From | Jason Wang <> | Date | Thu, 6 Aug 2020 11:23:05 +0800 |
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On 2020/8/5 下午7:40, Michael S. Tsirkin wrote: > On Wed, Aug 05, 2020 at 02:14:07PM +0800, Jason Wang wrote: >> On 2020/8/4 上午5:00, Michael S. Tsirkin wrote: >>> Some legacy guests just assume features are 0 after reset. >>> We detect that config space is accessed before features are >>> set and set features to 0 automatically. >>> Note: some legacy guests might not even access config space, if this is >>> reported in the field we might need to catch a kick to handle these. >> I wonder whether it's easier to just support modern device? >> >> Thanks > Well hardware vendors are I think interested in supporting legacy > guests. Limiting vdpa to modern only would make it uncompetitive.
My understanding is that, IOMMU_PLATFORM is mandatory for hardware vDPA to work. So it can only work for modern device ...
Thanks
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