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/linux-6.12.1/Documentation/admin-guide/hw-vuln/
Dreg-file-data-sampling.rst2 Register File Data Sampling (RFDS)
5 Register File Data Sampling (RFDS) is a microarchitectural vulnerability that
6 only affects Intel Atom parts(also branded as E-cores). RFDS may allow
8 registers, vector registers, or integer registers. RFDS does not provide the
9 ability to choose which data is inferred. CVE-2023-28746 is assigned to RFDS.
43 information using the VERW instruction. Like MDS, RFDS deploys the same
62 - Bit 27 - RFDS_NO - When set, processor is not affected by RFDS.
63 - Bit 28 - RFDS_CLEAR - When set, processor is affected by RFDS, and has the
68 The kernel command line allows to control RFDS mitigation at boot time with the
/linux-6.12.1/arch/x86/kernel/cpu/
Dcommon.c1230 #define RFDS BIT(7) macro
1258 VULNBL_INTEL_STEPPINGS(INTEL_ALDERLAKE, X86_STEPPING_ANY, RFDS),
1259 VULNBL_INTEL_STEPPINGS(INTEL_ALDERLAKE_L, X86_STEPPING_ANY, RFDS),
1260 VULNBL_INTEL_STEPPINGS(INTEL_RAPTORLAKE, X86_STEPPING_ANY, RFDS),
1261 VULNBL_INTEL_STEPPINGS(INTEL_RAPTORLAKE_P, X86_STEPPING_ANY, RFDS),
1262 VULNBL_INTEL_STEPPINGS(INTEL_RAPTORLAKE_S, X86_STEPPING_ANY, RFDS),
1263 VULNBL_INTEL_STEPPINGS(INTEL_ATOM_GRACEMONT, X86_STEPPING_ANY, RFDS),
1264 VULNBL_INTEL_STEPPINGS(INTEL_ATOM_TREMONT, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RFDS),
1265 VULNBL_INTEL_STEPPINGS(INTEL_ATOM_TREMONT_D, X86_STEPPING_ANY, MMIO | RFDS),
1266 VULNBL_INTEL_STEPPINGS(INTEL_ATOM_TREMONT_L, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RFDS),
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/linux-6.12.1/arch/x86/
DKconfig2625 bool "RFDS Mitigation"
2629 Enable mitigation for Register File Data Sampling (RFDS) by default.
2630 RFDS is a hardware vulnerability which affects Intel Atom CPUs. It
/linux-6.12.1/Documentation/admin-guide/
Dkernel-parameters.txt1189 Sampling (RFDS) vulnerability. RFDS is a CPU
1193 RFDS only affects Intel Atom processors.
1201 are enabled. In order to disable RFDS mitigation all