diff options
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
| -rw-r--r-- | arch/powerpc/kvm/Kconfig | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index ddd88179110a..dcb398d5e009 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -128,9 +128,26 @@ config KVM_BOOK3S_64_PR and system calls on the host. config KVM_BOOK3S_HV_EXIT_TIMING - bool "Detailed timing for hypervisor real-mode code" + bool + +config KVM_BOOK3S_HV_P9_TIMING + bool "Detailed timing for the P9 entry point" + select KVM_BOOK3S_HV_EXIT_TIMING depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS help + Calculate time taken for each vcpu during vcpu entry and + exit, time spent inside the guest and time spent handling + hypercalls and page faults. The total, minimum and maximum + times in nanoseconds together with the number of executions + are reported in debugfs in kvm/vm#/vcpu#/timings. + + If unsure, say N. + +config KVM_BOOK3S_HV_P8_TIMING + bool "Detailed timing for hypervisor real-mode code (for POWER8)" + select KVM_BOOK3S_HV_EXIT_TIMING + depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS && !KVM_BOOK3S_HV_P9_TIMING + 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 @@ -149,7 +166,7 @@ config KVM_BOOK3S_HV_NESTED_PMU_WORKAROUND Old nested HV capable Linux guests have a bug where they don't reflect the PMU in-use status of their L2 guest to the L0 host while the L2 PMU registers are live. This can result in loss - of L2 PMU register state, causing perf to not work correctly in + of L2 PMU register state, causing perf to not work correctly in L2 guests. Selecting this option for the L0 host implements a workaround for |