Bug 23273 - Backport upstream patches to optimize swiotlb initialization, fix DAX mapping under CVM
Summary: Backport upstream patches to optimize swiotlb initialization, fix DAX mapping...
Status: NEW
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: virt (show other bugs) virt
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: 谭钦云
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Reported: 2025-08-05 20:53 UTC by wojiaohanliyang
Modified: 2025-08-05 20:57 UTC (History)
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Description wojiaohanliyang hygon_group 2025-08-05 20:53:08 UTC 
Description of problem:

Backport the following 2 patches:

- dfcf2e017f5bb928094952d5d56d3566d3d07ba7 swiotlb: do not zero buffer in set_memory_decrypted()
  This change eliminates meaningless swiotlb initialization so that CVMs can boot faster when the swiotlb is too large.
- 867400af90f1f953ff9e10b1b87ecaf9369a7eb8 mm/memremap.c: map FS_DAX device memory as decrypted
  This change avoid FSDAX devices failure when launch SEV guest mulitple times.

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Comment 1 小龙 admin 2025-08-05 20:57:08 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/5578