diff options
Diffstat (limited to 'drivers/xen/time.c')
| -rw-r--r-- | drivers/xen/time.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/xen/time.c b/drivers/xen/time.c index 71078425c9ea..2257b6663766 100644 --- a/drivers/xen/time.c +++ b/drivers/xen/time.c @@ -6,6 +6,7 @@ #include <linux/math64.h> #include <linux/gfp.h> +#include <asm/paravirt.h> #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> @@ -75,6 +76,15 @@ bool xen_vcpu_stolen(int vcpu) return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable; } +static u64 xen_steal_clock(int cpu) +{ + struct vcpu_runstate_info state; + + BUG_ON(cpu != smp_processor_id()); + xen_get_runstate_snapshot(&state); + return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline]; +} + void xen_setup_runstate_info(int cpu) { struct vcpu_register_runstate_memory_area area; @@ -86,3 +96,13 @@ void xen_setup_runstate_info(int cpu) BUG(); } +void __init xen_time_setup_guest(void) +{ + pv_time_ops.steal_clock = xen_steal_clock; + + static_key_slow_inc(¶virt_steal_enabled); + /* + * We can't set paravirt_steal_rq_enabled as this would require the + * capability to read another cpu's runstate info. + */ +} |