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Macros | |
| #define | CPUID_AMD_PROCESSOR_TOPOLOGY 0x8000001E |
| #define | CPUID_MEMORY_ENCRYPTION_INFO 0x8000001F |
| #define | CPUID_SIGNATURE_AUTHENTIC_AMD_EBX SIGNATURE_32 ('A', 'u', 't', 'h') |
| #define | CPUID_SIGNATURE_AUTHENTIC_AMD_EDX SIGNATURE_32 ('e', 'n', 't', 'i') |
| #define | CPUID_SIGNATURE_AUTHENTIC_AMD_ECX SIGNATURE_32 ('c', 'A', 'M', 'D') |
Detailed Description
CPUID leaf definitions.
Provides defines for CPUID leaf indexes. Data structures are provided for registers returned by a CPUID leaf that contain one or more bit fields. If a register returned is a single 32-bit value, then a data structure is not provided for that register.
Copyright (c) 2017, Advanced Micro Devices. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
- Specification Reference:
- AMD64 Architecture Programming Manual volume 2, March 2017, Sections 15.34
Definition in file Cpuid.h.
Macro Definition Documentation
◆ CPUID_AMD_PROCESSOR_TOPOLOGY
| #define CPUID_AMD_PROCESSOR_TOPOLOGY 0x8000001E |
CPUID AMD Processor Topology
- Parameters
-
EAX CPUID_AMD_PROCESSOR_TOPOLOGY (0x8000001E)
- Return values
-
EAX Extended APIC ID described by the type CPUID_AMD_PROCESSOR_TOPOLOGY_EAX. EBX Core Identifiers described by the type CPUID_AMD_PROCESSOR_TOPOLOGY_EBX. ECX Node Identifiers described by the type CPUID_AMD_PROCESSOR_TOPOLOGY_ECX. EDX Reserved.
◆ CPUID_MEMORY_ENCRYPTION_INFO
| #define CPUID_MEMORY_ENCRYPTION_INFO 0x8000001F |
CPUID Memory Encryption Information
- Parameters
-
EAX CPUID_MEMORY_ENCRYPTION_INFO (0x8000001F)
- Return values
-
EAX Returns the memory encryption feature support status. EBX If memory encryption feature is present then return the page table bit number used to enable memory encryption support and reducing of physical address space in bits. ECX Returns number of encrypted guest supported simultaneously. EDX Returns minimum SEV enabled and SEV disabled ASID.
Example usage
UINT32 Eax;
UINT32 Ebx;
UINT32 Ecx;
UINT32 Edx;
AsmCpuid (CPUID_MEMORY_ENCRYPTION_INFO, &Eax, &Ebx, &Ecx, &Edx);
◆ CPUID_SIGNATURE_AUTHENTIC_AMD_EBX
CPUID Signature Information
- Parameters
-
EAX CPUID_SIGNATURE (0x00)
- Return values
-
EAX Returns the highest value the CPUID instruction recognizes for returning basic processor information. The value is returned is processor specific. EBX First 4 characters of a vendor identification string. ECX Last 4 characters of a vendor identification string. EDX Middle 4 characters of a vendor identification string. CPUID signature values returned by AMD processors
