Re: [Xen-devel] [PATCH v3] new config option vtsc_tolerance_khz to avoid TSC emulation

[Olaf Hering <olaf@xxxxxxxxx>]

Am Tue, 6 Mar 2018 11:07:54 +0000
schrieb Andrew Cooper <andrew.cooper3@xxxxxxxxxx>:

> We should see about using better sources of information.  For one, many
> Intel systems actually expose the TSC frequency in the bottom of the
> PLATFORM_INFO MSR, although this isn't architectural, and has been
> replaced with CPUID information in Skylake.

I'm not familiar with that.
Is it what arch/x86/kernel/tsc_msr.c:cpu_khz_from_msr()
gets from MSR_PLATFORM_INFO + MSR_FSB_FREQ?

Olaf

Attachment: pgpIS7YVfiRbf.pgp
Description: Digitale Signatur von OpenPGP

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel