Messages in this thread | | | Date | Mon, 21 Aug 2023 15:52:01 +0800 | From | Chao Gao <> | Subject | Re: [PATCH] kvm: x86: emulate MSR_PLATFORM_INFO msr bits |
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On Mon, Aug 21, 2023 at 11:26:32AM +0800, Hao Xiang wrote: >For intel platform, The BzyMhz field of Turbostat shows zero >due to the missing of part msr bits of MSR_PLATFORM_INFO. > >Acquire necessary msr bits, and expose following msr info to guest, >to make sure guest can get correct turbo frequency info.
Userspace VMM (e.g., QEMU) can configure this MSR for guests. Please refer to tools/testing/selftests/kvm/x86_64/platform_info_test.c.
The question is why KVM needs this patch given KVM already provides interfaces for QEMU to configure the MSR.
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