Introduce platform specific BAR size constrain to Resizable BAR feature in EDK2 (Bugzilla Bug 4868)

[tianocore-issues]

This issue was created automatically with bugzilla2github

Bugzilla Bug 4868

Date: 2024-10-15T23:48:35+00:00
From: NongFoster <<foster.nong>>
To: NongFoster <<foster.nong>>
CC: foster.nong, @lgao4, @niruiyu

Last updated: 2024-10-23T20:44:41+00:00

[tianocore-issues]

Comment 23457

Date: 2024-10-15 23:48:35 +0000
From: NongFoster <<foster.nong>>

• Industry Specification: ---
• Release Observed: EDK II Master
• Releases to Fix: EDK II Master
• Target OS: ---
• Bugzilla Assignee(s): NongFoster <<foster.nong>>

PCIe Resizable BAR feature will always configure in the device the largest supported BAR size. It will be over supported system physical address space in some PCIE cards case, and will lead to system can't allocate enough resource for these resizable BAR.

We need enhance current Pcie Resizable BAR feature. develop a mechanism to pass platform specific constrain on the BAR size, then EDK PCIe Resizable BAR feature will configure largest BAR size within platform constrain.

[tianocore-issues]

Comment 23458

Date: 2024-10-15 23:51:17 +0000
From: NongFoster <<foster.nong>>

Assign me as owner. I will send out the patch for this issue.

[tianocore-issues]

Comment 23479

Date: 2024-10-23 20:44:41 +0000
From: @lgao4

NongFoster: please work on it.