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See all on WikipediaA model-specific register (MSR) is any of various control registers in the x86 system architecture used for debugging, program execution tracing, computer performance monitoring, and toggling certain CPU features. See more
Reading and writing to these registers is handled by the rdmsr and wrmsr instructions, respectively. As these are privileged instructions, … See more
Wikipedia text under CC-BY-SA license Model Specific Registers - OSDev Wiki
- Each MSR that is accessed by the RDMSR and WRMSR group of instructions is identified by a 32-bit integer. MSRs are 64-bit wide. The presence of MSRs on your processor is indicated by CPUID.01h:EDX[bit 5].
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WEBFeb 23, 2024 · This article focuses on two of the tools provided by msr-tools: rdmsr and wrmsr. Reading MSRs using RDMSR. The rdmsr tool enables reading the value of a specific MSR from userspace. It also allows the user to specify the core from which to read the MSR. The basic syntax is as follows: # rdmsr MSR [ -p CPU ]
WEBJun 6, 2023 · So MSR is a function with optional storage attached and accessed via RDMSR/WRMSR instructions by its number ("address"). Check "Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 4: Model-Specific Register" for all the bloody-technical details.
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WEBIntel® 64 and IA-32 Architectures Software Developer’s Manual Volume 4: Model-Specific Registers NOTE: The Intel® 64 and IA-32 Architectures Software Developer's Manual consists of ten volumes: Basic Architecture, Order Number 253665; Instruction Set Reference A-L, Order Number 253666; Instruction Set Reference M-U, Order Number …
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WEBmsr(4) Kernel Interfaces Manual msr(4) NAME top msr - x86 CPU MSR access device DESCRIPTION top /dev/cpu/CPUNUM/msr provides an interface to read and write the model-specific registers (MSRs) of an x86 CPU.CPUNUM is the number of the CPU to access as listed in /proc/cpuinfo.The register access is done by opening the file and …
WEBOct 25, 2023 · Get help at Microsoft Q&A. The rdmsr command reads a Model-Specific Register (MSR) value from the specified address.
RDMSR — Read From Model Specific Register - felixcloutier.com
WEBReads the contents of a 64-bit model specific register (MSR) specified in the ECX register into registers EDX:EAX. (On processors that support the Intel 64 architecture, the high-order 32 bits of RCX are ignored.) The EDX register is loaded with the high-order 32 bits of the MSR and the EAX register is loaded with the low-order 32 bits.
WEBApr 1, 2024 · この記事の内容. rdmsr コマンドは、指定されたアドレスからモデル固有レジスタ (MSR) の値を読み取ります。. rdmsr Address パラメーター. 住所 MSR のアドレスを指定します。. 環境
WEBDescription ¶. Writes the contents of registers EDX:EAX into the 64-bit model specific register (MSR) specified in the ECX register. (On processors that support the Intel 64 architecture, the high-order 32 bits of RCX are ignored.) The contents of the EDX register are copied to high-order 32 bits of the selected MSR and the contents of the EAX ...
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