diff options
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
| -rw-r--r-- | arch/powerpc/kvm/Kconfig | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index 11850f310fb4..3caec2c42105 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -75,7 +75,7 @@ config KVM_BOOK3S_64 config KVM_BOOK3S_64_HV tristate "KVM support for POWER7 and PPC970 using hypervisor mode in host" - depends on KVM_BOOK3S_64 + depends on KVM_BOOK3S_64 && PPC_POWERNV select KVM_BOOK3S_HV_POSSIBLE select MMU_NOTIFIER select CMA @@ -110,6 +110,20 @@ config KVM_BOOK3S_64_PR processor, including emulating 32-bit processors on a 64-bit host. +config KVM_BOOK3S_HV_EXIT_TIMING + bool "Detailed timing for hypervisor real-mode code" + depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS + ---help--- + Calculate time taken for each vcpu in the real-mode guest entry, + exit, and interrupt handling code, plus time spent in the guest + and in nap mode due to idle (cede) while other threads are still + in the guest. The total, minimum and maximum times in nanoseconds + together with the number of executions are reported in debugfs in + kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40 + ns per exit on POWER8. + + If unsure, say N. + config KVM_BOOKE_HV bool |