Unable to enable 5 level paging Description of problem: When attempting to set cr4.LA57, qemu just freezes on that instruction. When I say freeze I mean literally freeze, no exceptions, nothing, it just halts forever on that instruction. When this happened, the first thing I did was ``` (qemu) info registers EAX=00001000 EBX=00000001 ECX=80224f08 EDX=00000000 ESI=8034a3a0 EDI=00026520 EBP=000079f8 ESP=000079c8 EIP=00019648 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0020 00000000 ffffffff 00c09300 DPL=0 DS [-WA] CS =0018 00000000 ffffffff 00c09a00 DPL=0 CS32 [-R-] SS =0020 00000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0020 00000000 ffffffff 00c09300 DPL=0 DS [-WA] FS =0020 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] GS =0020 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] LDT=0000 00000000 00000000 00008200 DPL=0 LDT TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy GDT= 0000e120 00000037 IDT= 00000000 00000000 CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 ... ``` then using gdb to figure out what instruction it is hanging on, I set a breakpoint at 0x19648 at and ran ``` (gdb) x/1 0x19648 => 0x19648: mov %rax,%cr4 (gdb) ``` This instruction corresponds to this LOC within limine https://github.com/limine-bootloader/limine/blob/trunk/stage23/protos/stivale.32.c#L33 Steps to reproduce: 1. Try to enable 5 level paging 2. qemu freezes when trying to set cr4.LA57 3. cry Additional information: This never happened prior to version 6.1, I test this on multiple different machines and a few of my friends experienced the same issue I have not tested this on linux, however I assume it will do the same on anything else. Either way, qemu should not be just halting