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Commit 34e38523 authored by Stefano Stabellini's avatar Stefano Stabellini Committed by David Vrabel
Browse files

xen/arm: account for stolen ticks 



Register the runstate_memory_area with the hypervisor.
Use pv_time_ops.steal_clock to account for stolen ticks.

Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
parent dfd57bc3

arch/arm/xen/enlighten.c

+19 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <xen/page.h>

#include <xen/interface/sched.h>

#include <xen/xen-ops.h>

#include <asm/paravirt.h>

#include <asm/xen/hypervisor.h>

#include <asm/xen/hypercall.h>

#include <asm/system_misc.h>
@@ -79,6 +80,19 @@ int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, 
}

EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);



static unsigned long long xen_stolen_accounting(int cpu)

{

	struct vcpu_runstate_info state;



	BUG_ON(cpu != smp_processor_id());



	xen_get_runstate_snapshot(&state);



	WARN_ON(state.state != RUNSTATE_running);



	return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline];

}



static void xen_percpu_init(void)

{

	struct vcpu_register_vcpu_info info;
@@ -104,6 +118,8 @@ static void xen_percpu_init(void) 
	BUG_ON(err);

	per_cpu(xen_vcpu, cpu) = vcpup;



	xen_setup_runstate_info(cpu);



after_register_vcpu_info:

	enable_percpu_irq(xen_events_irq, 0);

	put_cpu();
@@ -271,6 +287,9 @@ static int __init xen_guest_init(void) 


	register_cpu_notifier(&xen_cpu_notifier);



	pv_time_ops.steal_clock = xen_stolen_accounting;

	static_key_slow_inc(&paravirt_steal_enabled);



	return 0;

}

early_initcall(xen_guest_init);