[coreboot - Bug #327] MBOX3, OperationRegion (OPRG, SystemMemory, ASLS, 0x2000) causes windows uefi tianocore BSOD ACPI_BIOS_ERROR

[Mat Phillips]

Issue #327 has been updated by Mat Phillips.

Matt DeVillier wrote in #note-6:
> > When set to 0x1000 windows UEFI tianocore mode boots fine
>
> This seems to be a board-specific issue rather than platform or tree-wide issue. The IGD OpRegion spec published by Intel themselves specifies that the reserved region starting at ASLS is 0x2000 in size - see: https://01.org/sites/default/files/documentation/acpi_igd_opregion_spec_0.pd... p16.

I can agree that I tried this 0x1000 change and it had no affect on the problem.

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Bug #327: MBOX3, OperationRegion (OPRG, SystemMemory, ASLS, 0x2000) causes windows uefi tianocore BSOD ACPI_BIOS_ERROR
https://ticket.coreboot.org/issues/327#change-973

* Author: xinhua wang
* Status: New
* Priority: Normal
* Start date: 2021-12-30
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https://review.coreboot.org/c/coreboot/+/27711/7/src/drivers/intel/gma/acpi/...

this line .. OperationRegion (OPRG, SystemMemory, ASLS, 0x2000)
the 0x2000 will cause BSOD ACPI_BIOS_ERROR when booting installer, os, etc

When set to 0x1000 windows UEFI tianocore mode boots fine

---Files--------------------------------
dmesg.txt (76.9 KB)
results.log (204 KB)