Intel Xeon (server)
Skylake-SP
Intel Skylake-SP (2017) supports x86-64-v4.
- x86-64 level
- x86-64-v4
- Vendor
- Intel
- First products
- 2017
- Products
- Xeon Scalable (1st generation); Core X-series (Skylake-X)
- Segments
- GCC target
-march=skylake-avx512- Optimization
- Optimizing code for Skylake to Cooper Lake
Product lines
| Product line | Segment | Socket | Source |
|---|---|---|---|
| Xeon Scalable (1st generation) | server | LGA3647 | intel.com |
| Xeon W-2100ARK lists it as Server; Xeon W counts as workstation here. | workstation | LGA2066 | intel.com |
| Xeon W-3175XARK lists it as Desktop; HEDT counts as workstation here. | workstation | LGA3647 | intel.com |
| Xeon D-2100 | server | BGA2518 | intel.com |
| Core X-series (Skylake-X)ARK lists it as Desktop; HEDT counts as workstation here. | workstation | LGA2066 | intel.com |
Feature checklist
| Feature | Skylake-SP | Enumerated by | Linux flag |
|---|---|---|---|
| x86-64-v1 | |||
| CMOV | Yes | CPUID.01H:EDX[15] | cmov |
| CX8 | Yes | CPUID.01H:EDX[8] | cx8 |
| FPU | Yes | CPUID.01H:EDX[0] | fpu |
| FXSR | Yes | CPUID.01H:EDX[24] | fxsr |
| MMX | Yes | CPUID.01H:EDX[23] | mmx |
| OSFXSR via FXSR | Yes | CPUID.01H:EDX[24] | fxsr |
| SCE | Yes | CPUID.80000001H:EDX[11] | syscall |
| SSE | Yes | CPUID.01H:EDX[25] | sse |
| SSE2 | Yes | CPUID.01H:EDX[26] | sse2 |
| x86-64-v2 | |||
| CMPXCHG16B | Yes | CPUID.01H:ECX[13] | cx16 |
| LAHF-SAHF | Yes | CPUID.80000001H:ECX[0] | lahf_lm |
| POPCNT | Yes | CPUID.01H:ECX[23] | popcnt |
| SSE3 | Yes | CPUID.01H:ECX[0] | pni |
| SSE4.1 | Yes | CPUID.01H:ECX[19] | sse4_1 |
| SSE4.2 | Yes | CPUID.01H:ECX[20] | sse4_2 |
| SSSE3 | Yes | CPUID.01H:ECX[9] | ssse3 |
| x86-64-v3 | |||
| AVX | Yes | CPUID.01H:ECX[28] | avx |
| AVX2 | Yes | CPUID.(EAX=07H,ECX=0):EBX[5] | avx2 |
| BMI1 | Yes | CPUID.(EAX=07H,ECX=0):EBX[3] | bmi1 |
| BMI2 | Yes | CPUID.(EAX=07H,ECX=0):EBX[8] | bmi2 |
| F16C | Yes | CPUID.01H:ECX[29] | f16c |
| FMA | Yes | CPUID.01H:ECX[12] | fma |
| LZCNT | Yes | CPUID.80000001H:ECX[5] | abm |
| MOVBE | Yes | CPUID.01H:ECX[22] | movbe |
| OSXSAVE via XSAVE | Yes | CPUID.01H:ECX[26] | xsave |
| x86-64-v4 | |||
| AVX512F | Yes | CPUID.(EAX=07H,ECX=0):EBX[16] | avx512f |
| AVX512BW | Yes | CPUID.(EAX=07H,ECX=0):EBX[30] | avx512bw |
| AVX512CD | Yes | CPUID.(EAX=07H,ECX=0):EBX[28] | avx512cd |
| AVX512DQ | Yes | CPUID.(EAX=07H,ECX=0):EBX[17] | avx512dq |
| AVX512VL | Yes | CPUID.(EAX=07H,ECX=0):EBX[31] | avx512vl |
Other extensions
Notable extensions outside the x86-64 levels. Vendors sometimes disable these on individual models. Linked names lead to the extension's instructions.
Known vulnerabilities
The CVEs that the sources of the vulnerability list name as affecting Skylake-SP, in all of its models or in some of them.
- CVE-2025-40300 VMSCAPE
- CVE-2022-40982 Gather Data Sampling Some models
- CVE-2022-29901 Retbleed: Return Stack Buffer Underflow
- CVE-2022-21166 Processor MMIO Stale Data: Device Register Partial Write
- CVE-2022-0004 Intel BIOS, UEFI and SMM: Boot Guard and TXT lock override Some models
- CVE-2021-0127 Intel processor errata: Breakpoint control flow Some models
- CVE-2021-0089 Speculative Code Store Bypass
- CVE-2021-0086 Floating Point Value Injection
- CVE-2020-8696 Vector Register Sampling: Vector Register Sampling Active
- CVE-2020-8695 RAPL Energy Reporting: RAPL energy reporting
- CVE-2020-0551 Load Value Injection
- CVE-2020-0549 L1D Eviction Sampling
- CVE-2020-0548 Vector Register Sampling
- CVE-2019-11139 Voltage Settings Modification: Voltage Setting Modulation: Xeon Scalable Some models
- CVE-2019-11135 TSX Asynchronous Abort
- CVE-2019-11091 Microarchitectural Data Sampling: Microarchitectural Data Sampling Uncacheable Memory
- CVE-2019-1125 Spectre variant 1: Spectre v1 swapgs
- CVE-2018-12207 iTLB multihit: Machine Check Error Avoidance on Page Size Change
- CVE-2018-12130 Microarchitectural Data Sampling: Microarchitectural Fill Buffer Data Sampling
- CVE-2018-12127 Microarchitectural Data Sampling: Microarchitectural Load Port Data Sampling
- CVE-2018-12126 Microarchitectural Data Sampling: Microarchitectural Store Buffer Data Sampling
- CVE-2018-3646 L1 Terminal Fault: L1 Terminal Fault: virtualization
- CVE-2018-3640 Rogue System Register Read
- CVE-2018-3639 Speculative Store Bypass
- CVE-2018-3620 L1 Terminal Fault: L1 Terminal Fault: operating systems and SMM
- CVE-2018-3615 L1 Terminal Fault: L1 Terminal Fault: SGX
- CVE-2017-5754 Meltdown: Rogue Data Cache Load
- CVE-2017-5753 Spectre variant 1: Bounds Check Bypass
- CVE-2017-5715 Spectre variant 2: Branch Target Injection
Other Intel Xeon (server) microarchitectures
- Skylake-SP 2017 v4
- Cascade Lake 2019 v4
- Cooper Lake 2020 v4
- Ice Lake (server) 2021 v4
- Emerald Rapids 2023 v4
- Sapphire Rapids 2023 v4
- Granite Rapids 2024 v4
- Sierra Forest 2024 v3
- Clearwater Forest 2026 v3
- Diamond Rapids announced v4
Sources
- GCC -march=skylake-avx512 feature set (PTA_SKYLAKE_AVX512)
- Intel 64 and IA-32 Architectures Software Developer's Manual, Volume 4, 335592-093, Table 2-1: Model 06_55H: Xeon Scalable processors based on Skylake (also 2nd generation Cascade Lake and 3rd generation Cooper Lake).
- Intel ARK: Products formerly Skylake: Launch dates; the Core X-series models start in Q2'17 (Core i7-7820X), the Xeon Scalable ones in Q3'17.