Re: [Qemu-devel] [PATCH v6 11/14] target/arm: PMU: Add instruction and cycle events

[Richard Henderson]

On 10/10/18 1:37 PM, Aaron Lindsay wrote:
> + * Return the underlying cycle count for the PMU cycle counters. If we're in
> + * usermode, simply return 0.
> + */
> +static uint64_t cycles_get_count(CPUARMState *env)
> +{
> +#ifndef CONFIG_USER_ONLY
> +    return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
> +                   ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
> +#else
> +    return 0;
> +#endif
> +}

Usually we pass through the host cycle counter.
See cpu_get_host_ticks().


r~