Bug 28344 - Batch flusing user memory encrytion status change
Summary: Batch flusing user memory encrytion status change
Status: NEW
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: mm (show other bugs) mm
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: baolinwang
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Reported: 2025-12-22 10:57 UTC by nizhiguang
Modified: 2025-12-22 11:04 UTC (History)
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Description nizhiguang hygon_group 2025-12-22 10:57:20 UTC 
Description of problem:

Each time when a user page encryption status changes, invoking hypercall to map/unmap the page from iommu page table is expensive as to performance, besides, on CSV3 platform, changing the page between private and shared is very expensive.

The patch enables batch operation of pages should change their encryption status, optimize the perfromance.
Comment 1 小龙 admin 2025-12-22 11:04:04 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/6238