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Diffstat (limited to 'src/cpu/kvm/base.hh')
| -rw-r--r-- | src/cpu/kvm/base.hh | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/cpu/kvm/base.hh b/src/cpu/kvm/base.hh index 4546b1071..c53f715e3 100644 --- a/src/cpu/kvm/base.hh +++ b/src/cpu/kvm/base.hh @@ -154,6 +154,21 @@ class BaseKvmCPU : public BaseCPU virtual void tick(); /** + * Get the value of the hardware cycle counter in the guest. + * + * This method is supposed to return the total number of cycles + * executed in hardware mode relative to some arbitrary point in + * the past. It's mainly used when estimating the number of cycles + * actually executed by the CPU in kvmRun(). The default behavior + * of this method is to use the cycles performance counter, but + * some architectures may want to use internal registers instead. + * + * @return Number of host cycles executed relative to an undefined + * point in the past. + */ + virtual uint64_t getHostCycles() const; + + /** * Request KVM to run the guest for a given number of ticks. The * method returns the approximate number of ticks executed. * |