feat: Check if VM supports TSC #3
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tisonkun
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Oct 5, 2024
tisonkun
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Oct 5, 2024
tisonkun
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@andylokandy @zhongzc I'm yet to have time check if has_invariant_tsc work reasonably. Would you take a look?
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@ariesdevil I noticed that we don't release this patch. Do you need a new version for use? |
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Invariant TSC could make sure TSC got synced among multiple CPUs, so we check CPUID first,
0x80000007is a specific CPUID leaf used to query the advanced power management features of a processor, including support for an invariant TSC.In some VMs, the Max Extended Function in CPUID is < 0x80000007, we should enable TSC if the system clock source is TSC.
FYI: CPUID explorer