Bug 3025 - Fix DMA writes disorder issue for Zhaoxin's KH-40000 platform
Summary: Fix DMA writes disorder issue for Zhaoxin's KH-40000 platform
Status: NEW
Alias: None
Product: ANCK 4.19 Dev
Classification: ANCK
Component: mm (show other bugs) mm
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: wangrongwei
QA Contact: shuming
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Reported: 2022-11-11 16:37 UTC by LeoLiu-oc
Modified: 2022-11-11 16:37 UTC (History)
3 users (show)

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Description LeoLiu-oc zhaoxin_group 2022-11-11 16:37:58 UTC 
Description of problem:
the Zhaoxin KH-40000 platform can’t keep the PCIE transaction order for DMA writes, whose target addresses are located in different NUMA nodes, from the same device. Patch this issue by flushing the target DMA write with a subsequent PCIE configuration space read operation.

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