Re: [edk2-devel] OS hangs at Exit Boot Services

["Alireza Banejad via groups.io" <alibanejad1376=gmail.com@groups.io>]

Hello Mounika,
I have had the same issue with my platform and had the OS stuck for
different reasons. These are the things you can do to see if you are
making any progress:
1. I had the OS stuck at the same place you are stuck because of the
PROGRESS CODE reports and the DEBUG logs sending data through the
serial port. Try to disable these logs and see if you can get any
further.
The reason is that the hardware should completely be within the OS's
possession at this point, so calls to the serial port at further
stages, such as the RunTime Stage, may crash the processor.
2. Try to check the memory map passed from SBL to EDK2 as a HOB is
completely correct.

Best,
Alireza


On Thu, Mar 27, 2025 at 7:38 AM Mounika via groups.io
<mounika.a=coreel.com@groups.io> wrote:
>
> We are trying to boot RTOS on TGL platform with SBL+UEFI payload.
> We discussed with our OS vendor, and we started booting OS with default payload and we were able to boot OS, but when we tried switching to UEFI payload, OS didn't boot
> and it got stuck at below prints.
>
> XhcClearBiosOwnership: called to clear BIOS ownership
> FPDT: -ResetEnd                = 339000000
> FPDT: -OsLoaderLoadImageStart  = 15095000000
> FPDT: -OsLoaderStartImageStart = 15126000000
> FPDT: -ExitBootServicesEntry   = 24262000000
> FSP NotifyPhase EndOfFirmware Success.
> gAddPerfRecordProtocolGuid - Locate protocol failed
> SmmInstallProtocolInterface: 296EB418-C4C8-4E05-AB59-39E8AF56F00A 0
> CpuDxe: 5-Level Paging = 0
> MpInitChangeApLoopCallback() done!
> SetUefiImageMemoryAttributes - 0x00000000759CC000 - 0x000000000000A000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x00000000759C2000 - 0x000000000000A000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x00000000759B8000 - 0x000000000000A000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x00000000759AE000 - 0x000000000000A000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x00000000759A5000 - 0x0000000000009000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x0000000075999000 - 0x000000000000C000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x000000007598C000 - 0x000000000000D000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x0000000075983000 - 0x0000000000009000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x000000007597A000 - 0x0000000000009000 (0x0000000000000008)
> SetUefiImageMemoryAttributes - 0x0000000075970000 - 0x000000000000A000 (0x0000000000000008)
>
> We just want some clarifications regarding exit boot services, whether EFI boot services succeeded or failed and where to add debug prints to identify the issue?
> 


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