1. Check the memory size shown in the setup in bios menu or using the smbiosview to see if the size matches the physical ram

2. Enable logs for the Linux kernel

3. Try to boot Linux with the nokaslr to disable randomization

4. Print the the memory map HOB when it is passed from SBL to EDKII to see if it is correct

the mentioned is to see if it is a memory issue. If so, it is highly likely that there is a problem with the FSP-M phase. Check if the headers provided are meant for your platform

On Thu, May 15, 2025, 2:22 PM Stepan via groups.io <radio-fan=mail.ru@groups.io> wrote:

I activate MULTIPLE_DEBUG_PORT_SUPPORT. This led to a new error (CPU exception?):

XhcClearBiosOwnership: called to clear BIOS ownership
!!!! X64 Exception Type - 06(#UD - Invalid Opcode)  CPU Apic ID - 00000000 !!!!
RIP  - 000000004BED32C8, CS  - 0000000000000038, RFLAGS - 0000000000210202
RAX  - 000000000000002F, RCX - 00000002AF803C18, RDX - 0000000000000000
RBX  - 0000000000000004, RSP - 0000000046D85A08, RBP - 0000000046D85B10
RSI  - 0000000046DAF830, RDI - 0000000046DAF310
R8   - 0000000000000000, R9  - 00000002AF803C60, R10 - 0000000000000000
R11  - 0000000000000002, R12 - 0000000046DB73C0, R13 - 0000000000000010
R14  - 00000002AF803C18, R15 - 0000000046DB72C0
DS   - 0000000000000030, ES  - 0000000000000030, FS  - 0000000000000030
GS   - 0000000000000030, SS  - 0000000000000030
CR0  - 0000000080010033, CR2 - 0000000000000000, CR3 - 0000000046A01000
CR4  - 0000000000040668, CR8 - 0000000000000000
DR0  - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
DR3  - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
GDTR - 0000000047FFF000 0000000000000047, LDTR - 0000000000000000
IDTR - 00000002AF94F018 0000000000000FFF,   TR - 0000000000000000
FXSAVE_STATE - 0000000046D85660
!!!! Find image based on IP(0x4BED32C8) (No PDB)  (ImageBase=0000000047BFA180, EntryPoint=0000000047BFA315) !!!!