kvm: x86: Update tsc multiplier on change.

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commit 2680d6da45 upstream.

vmx.c writes the TSC_MULTIPLIER field in vmx_vcpu_load, but only when a
vcpu has migrated physical cpus. Record the last value written and
update in vmx_vcpu_load on any change, otherwise a cpu migration must
occur for TSC frequency scaling to take effect.

Fixes: ff2c3a1803
Signed-off-by: Owen Hofmann <osh@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Owen Hofmann 2016-03-01 13:36:13 -08:00 • committed by Greg Kroah-Hartman

parent ce16d9cf04

commit 8cedd1c079

1 changed files with 9 additions and 5 deletions

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arch/x86/kvm/vmx.c

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