Model Specific Registers: Difference between revisions
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===Other access to MSRs=== |
===Other access to MSRs=== |
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As <code>rdmsr</code> and <code>wrmsr</code> are priveleged instructions, there are a few MSRs which are deemed safe for non-priveleged access. For example, the <code>rdtsc</code> instruction is a non priveleged instruction which will read the timestamp counter which is actually situated in an MSR. |
As <code>rdmsr</code> and <code>wrmsr</code> are priveleged instructions, there are a few MSRs which are deemed safe for non-priveleged access. For example, the <code>rdtsc</code> instruction is a non priveleged instruction which will read the timestamp counter which is actually situated in an MSR (index 10h). |
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==See Also== |
==See Also== |
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