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Subject: Re: [virtio-dev] Re: [PATCH v1] virtio-mmio: Specify wait needed in driver during reset
* Michael S. Tsirkin <mst@redhat.com> [2021-08-16 01:35:46]: > So thinking about all this, quite early in the setup process we > have: > > /* Figure out what features the device supports. */ > device_features = dev->config->get_features(dev); > > > isn't this sufficient? this will flush out > all writes and device can defer responding to reads > until reset is complete. Hmm not sure if that's possible in all MMIO devices? I think a while back Jason felt some of the MMIO devices, their registers could act as plain DRAM for reads, which means device can't block such reads? - vatsa --- Qualcomm Innovation Center, Inc. is submitting the attached "feedback" as a non-member to the virtio-dev mailing list for consideration and inclusion.
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