Bug 19223 - [Anolis23 GA][loongarch]龙芯平台无法使用ACPI DSM#5方法控制PCI资源分配
Summary: [Anolis23 GA][loongarch]龙芯平台无法使用ACPI DSM#5方法控制PCI资源分配
Status: NEW
Alias: None
Product: ANCK 6.6 Dev
Classification: ANCK
Component: ARCH(unspecified) (show other bugs) ARCH(unspecified)
Version: unspecified
Hardware: loongarch Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: zhangjing
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-03-06 15:13 UTC by Gao Qihang
Modified: 2025-03-06 17:16 UTC (History)
4 users (show)

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Description Gao Qihang loongson_group 2025-03-06 15:13:39 UTC 
Description of problem: 龙芯平台无法使用ACPI DSM#5方法控制PCI资源分配
在BIOS固件中，如果配置ACPI DSM#5返回0，OS必须保留固件中对PCI的资源分配；如果配置ACPI DSM#5返回1，OS可以忽略固件下对PCI的资源分配并重新分配。

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. 在BIOS Setup界面配置PCIe DSM#5 Support选项为“OS”/“BIOS”,在系统下观察PCI资源是否被重新分配。


Actual results:无论PCIe DSM#5 Support配置为“OS”还是“BIOS”，OS都会重新分配资源。


Expected results:PCIe DSM#5 Support配置为“OS”，OS下重新分配资源；PCIe DSM#5 Support配置为“BIOS”，OS下保留固件下的资源分配。


Additional info:
Comment 1 小龙 admin 2025-03-06 17:16:15 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/4782