Comment 0 for bug 1875012

Trying to boot a core20 amd64 image on an amd64 Eoan or Focal host via libvirt leads to:

KVM internal error. Suberror: 1
emulation failure
RAX=0000000000000000 RBX=000000003bdcd5c0 RCX=000000003ff1d030 RDX=00000000000019a0
RSI=00000000000000ff RDI=000000003bd73ee0 RBP=000000003bd73e40 RSP=000000003ff1d1f8
R8 =000000003df52168 R9 =0000000000000000 R10=ffffffffffffffff R11=000000003bd44c40
R12=000000003bd76500 R13=000000003bd73e00 R14=0000000000020002 R15=000000003df4b483
RIP=00000000000b0000 RFL=00210246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0030 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
CS =0038 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0030 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0030 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
FS =0030 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
GS =0030 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
GDT= 000000003fbee698 00000047
IDT= 000000003f2d8018 00000fff
CR0=80010033 CR2=0000000000000000 CR3=000000003fc01000 CR4=00000668
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000d00
Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <ff> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff