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| author | Carsten Otte <cotte@de.ibm.com> | 2010-05-17 12:00:04 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-05-17 12:00:15 +0400 |
| commit | cd3b70f5d4d82f85d1e1d6e822f38ae098cf7c72 (patch) | |
| tree | aa394e63d300312bece2afb53a53dfd93a0f5f23 /arch/s390/kvm/Kconfig | |
| parent | 6377981faf1a4425b0531e577736ef03df97c8f6 (diff) | |
| download | linux-cd3b70f5d4d82f85d1e1d6e822f38ae098cf7c72.tar.xz | |
[S390] virtualization aware cpu measurement
Use the SPP instruction to set a tag on entry to / exit of the virtual
machine context. This allows the cpu measurement facility to distinguish
the samples from the host and the different guests.
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/Kconfig')
| -rw-r--r-- | arch/s390/kvm/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig index a7251580891c..2f4b687cc7fa 100644 --- a/arch/s390/kvm/Kconfig +++ b/arch/s390/kvm/Kconfig @@ -33,6 +33,17 @@ config KVM If unsure, say N. +config KVM_AWARE_CMF + depends on KVM + bool "KVM aware sampling" + ---help--- + This option enhances the sampling data from the CPU Measurement + Facility with additional information, that allows to distinguish + guest(s) and host when using the kernel based virtual machine + functionality. + + If unsure, say N. + # OK, it's a little counter-intuitive to do this, but it puts it neatly under # the virtualization menu. source drivers/vhost/Kconfig |