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It misses the case where the platform advertises >> segmented RMP but the firmware has it disabled (MSR_AMD64_RMP_CFG's >> SEG_RMP_ENABLED bit is clear) > > What does that mean: "the platform advertises segmented RMP"? > > The CPUID bit is still set? Yes, "Advertises" is the X86_FEATURE_SEGMENTED_RMP CPUID bit set. That's separate from segmented RMP being enabled, which is MSR_AMD64_RMP_CFG[SEG_RMP_ENABLED] (0xc0010136, bit 0), programmed by firmware > > Or anything else? > > How do you create this configuration? There is a BIOS option to enable/disable Segmented RMP. Disabling it on a part that supports/advertises segmented RMP feature brings the RMP up contiguous (SEG_RMP_ENABLED clear) while the SEGMENTED_RMP CPUID bit stays set. Thanks, Ashish > > Thx. >