Multiple types of processors classified as Cascade Lake (2nd Generation Intel® Xeon® Scalable Processors) are marked as vulnerable to Retbleed

Issue

• Multiple types of processors classified as Cascade Lake (2nd Generation Intel® Xeon® Scalable Processors) are marked as "Vulnerable" to Retbleed when they should be marked as "Not affected."

sys/devices/system/cpu/vulnerabilities/tsx_async_abort:Not affected
sys/devices/system/cpu/vulnerabilities/srbds:Not affected
sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling, PBRSB-eIBRS: SW sequence
sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: usercopy/swapgs barriers and __user pointer sanitization
sys/devices/system/cpu/vulnerabilities/spec_store_bypass:Mitigation: Speculative Store Bypass disabled via prctl
sys/devices/system/cpu/vulnerabilities/retbleed:Vulnerable <<-------
sys/devices/system/cpu/vulnerabilities/mmio_stale_data:Vulnerable: Clear CPU buffers attempted, no microcode; SMT Host state unknown
sys/devices/system/cpu/vulnerabilities/meltdown:Not affected
sys/devices/system/cpu/vulnerabilities/mds:Not affected
sys/devices/system/cpu/vulnerabilities/l1tf:Not affected
sys/devices/system/cpu/vulnerabilities/itlb_multihit:KVM: Mitigation: VMX unsupported

Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              20
On-line CPU(s) list: 0-19
Thread(s) per core:  1
Core(s) per socket:  1
Socket(s):           20
NUMA node(s):        1
Vendor ID:           GenuineIntel
BIOS Vendor ID:      GenuineIntel
CPU family:          6
Model:               85 <<------- 0x55H
Model name:          Intel(R) Xeon(R) Gold 6226R CPU @ 2.90GHz
BIOS Model name:     Intel(R) Xeon(R) Gold 6226R CPU @ 2.90GHz
Stepping:            7
CPU MHz:             2893.202
BogoMIPS:            5786.40
Hypervisor vendor:   VMware
Virtualization type: full
L1d cache:           32K
L1i cache:           32K
L2 cache:            1024K
L3 cache:            22528K
NUMA node0 CPU(s):   0-19
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves arat pku ospke avx512_vnni md_clear flush_l1d arch_capabilities