Intel® Core™ Ultra Processors for H-series and U-series Platforms CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 795258 | 12/14/2023 | Public |
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MTRR Capability Register (MTRRCAP_0_0_0_VTDBAR) – Offset 100
Register reporting the Memory Type Range Register Capability. This register is treated as RsvdZ by implementations reporting Memory Type Support (MTS) as not supported in the Extended Capability register.
When implemented, value reported in this register must match IA32_MTRRCAP Model Specific Register (MSR) value reported by the host IA-32 processor(s).
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:11 | 0h | RO | Reserved |
| 10 | 1h | RO | Write Combining (WC) 0: Write-combining (WC) memory type is not supported. |
| 9 | 0h | RO | Reserved |
| 8 | 1h | RO | Fixed Range MTRRs Supported (FIX) 0: No fixed range MTRRs are supported |
| 7:0 | ah | RO | Variable MTRR Count (VCNT) Indicates number of variable range MTRRs are supported. |