Messages in this thread | | | Date | Tue, 22 Mar 2022 13:03:14 +0800 | From | Lu Baolu <> | Subject | Re: [PATCH RFC 10/11] iommu: Make IOPF handling framework generic |
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On 2022/3/21 20:43, Jason Gunthorpe wrote: > On Mon, Mar 21, 2022 at 11:42:16AM +0000, Jean-Philippe Brucker wrote: > >> I tend to disagree with that last part. The fault is caused by a specific >> device accessing shared page tables. We should keep that device >> information throughout the fault handling, so that we can report it to the >> driver when things go wrong. > SVA faults should never be reported to drivers?? >
When things go wrong, the corresponding response code will be responded to the device through iommu_page_response(). The hardware should then report the failure to the device driver and the device driver will handle it in the device-specific way. There's no need to propagate the I/O page faults to the device driver in any case. Do I understand it right?
Best regards, baolu
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