KVM: x86: nSVM: implement nested TSC scaling

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This was tested by booting a nested guest with TSC=1Ghz,
observing the clocks, and doing about 100 cycles of migration.

Note that qemu patch is needed to support migration because
of a new MSR that needs to be placed in the migration state.

The patch will be sent to the qemu mailing list soon.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210914154825.104886-14-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Maxim Levitsky 2021-09-14 18:48:24 +03:00 • committed by Paolo Bonzini

parent f800650a4e

commit 5228eb96a4

5 changed files with 63 additions and 6 deletions

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29

arch/x86/kvm/svm/nested.c

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31

arch/x86/kvm/svm/svm.c

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arch/x86/kvm/svm/svm.h

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arch/x86/kvm/vmx/vmx.c

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arch/x86/kvm/x86.c

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