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SubjectIntel KVM entry failed, hardware error 0x0
Date
Today’s linux-next started to fail with this config,

https://raw.githubusercontent.com/cailca/linux-mm/master/kcsan.config

qemu-kvm-2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64

I believe it was working yesterday. Before I bury myself bisecting it, does anyone have any thought?

# /usr/libexec/qemu-kvm -name ubuntu-18.04-server-cloudimg -cpu host -smp 2 -m 2G -hda ubuntu-18.04-server-cloudimg.qcow2 -cdrom ubuntu-18.04-server-cloudimg.iso -nic user,hostfwd=tcp::2222-:22 -nographic

KVM: entry failed, hardware error 0x0
EAX=00000000 EBX=00000000 ECX=00000000 EDX=000306f2
ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
EIP=0000fff0 EFL=00010002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 00000000 0000ffff 00009300
CS =f000 ffff0000 0000ffff 00009b00
SS =0000 00000000 0000ffff 00009300
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT= 00000000 0000ffff
IDT= 00000000 0000ffff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000

[28040.962363][T78789] *** Guest State ***
[28040.981990][T78789] CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7
[28041.030248][T78789] CR4: actual=0x0000000000002040, shadow=0x0000000000000000, gh_mask=ffffffffffffe871
[28041.075900][T78789] CR3 = 0x0000000000000000
[28041.096369][T78789] RSP = 0x0000000000000000 RIP = 0x000000000000fff0
[28041.127519][T78789] RFLAGS=0x00010002 DR7 = 0x0000000000000400
[28041.158730][T78789] Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
[28041.193409][T78789] CS: sel=0xf000, attr=0x0009b, limit=0x0000ffff, base=0x00000000ffff0000
[28041.234135][T78789] DS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
[28041.274796][T78789] SS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
[28041.315631][T78789] ES: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
[28041.357025][T78789] FS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
[28041.397808][T78789] GS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
[28041.438806][T78789] GDTR: limit=0x0000ffff, base=0x0000000000000000
[28041.479557][T78789] LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000
[28041.522599][T78789] IDTR: limit=0x0000ffff, base=0x0000000000000000
[28041.564289][T78789] TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000
[28041.604705][T78789] EFER = 0x0000000000000000 PAT = 0x0007040600070406
[28041.638146][T78789] DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000
[28041.676235][T78789] Interruptibility = 00000000 ActivityState = 00000000
[28041.709019][T78789] InterruptStatus = 0000
[28041.728432][T78789] *** Host State ***
[28041.746774][T78789] RIP = 0xffffffffc05ab620 RSP = 0xffffb24ec6c9fb08
[28041.777531][T78789] CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040
[28041.811313][T78789] FSBase=00007f697ffff700 GSBase=ffff8d799f980000 TRBase=fffffe00001e0000
[28041.851017][T78789] GDTBase=fffffe00001de000 IDTBase=fffffe0000000000
[28041.881294][T78789] CR0=0000000080050033 CR3=00000008802c8003 CR4=00000000001626e0
[28041.917895][T78789] Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
[28041.953737][T78789] EFER = 0x0000000000000d01 PAT = 0x0007040600070406
[28041.986043][T78789] *** Control State ***
[28042.006510][T78789] PinBased=000000ff CPUBased=b5a06dfa SecondaryExec=000037eb
[28042.043823][T78789] EntryControls=0000d1ff ExitControls=002befff
[28042.074416][T78789] ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000
[28042.110314][T78789] VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000
[28042.144970][T78789] VMExit: intr_info=00000000 errcode=00000000 ilen=00000003
[28042.178829][T78789] reason=00000030 qualification=0000000000000184
[28042.211619][T78789] IDTVectoring: info=00000000 errcode=00000000
[28042.240511][T78789] TSC Offset = 0xffffbe0284927b21
[28042.264284][T78789] SVI|RVI = 00|00 TPR Threshold = 0x00
[28042.289414][T78789] APIC-access addr = 0x0000000e5dfc0000 virt-APIC addr = 0x0000000d2e76c000
[28042.330409][T78789] PostedIntrVec = 0xf2
[28042.349513][T78789] EPT pointer = 0x000000105a27005e
[28042.372955][T78789] PLE Gap=00000080 Window=00001000
[28042.396744][T78789] Virtual processor ID = 0x0001

# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s) per core: 1
Core(s) per socket: 12
Socket(s): 4
NUMA node(s): 4
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-4650 v3 @ 2.10GHz
Stepping: 2
CPU MHz: 1400.623
BogoMIPS: 4195.13
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 30720K
NUMA node0 CPU(s): 0-5,24-29
NUMA node1 CPU(s): 6-11,30-35
NUMA node2 CPU(s): 12-17,36-41
NUMA node3 CPU(s): 18-23,42-47
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb invpcid_single pti intel_ppin ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm arat pln pts flush_l1d
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