From ecb23dc6f2eff0ce64dd60351a81f376f13b12cc Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Fri, 20 May 2016 09:26:48 +0200 Subject: xen: add steal_clock support on x86 The pv_time_ops structure contains a function pointer for the "steal_clock" functionality used only by KVM and Xen on ARM. Xen on x86 uses its own mechanism to account for the "stolen" time a thread wasn't able to run due to hypervisor scheduling. Add support in Xen arch independent time handling for this feature by moving it out of the arm arch into drivers/xen and remove the x86 Xen hack. Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Reviewed-by: Stefano Stabellini Signed-off-by: David Vrabel --- arch/arm/xen/enlighten.c | 18 ++---------------- 1 file changed, 2 insertions(+), 16 deletions(-) (limited to 'arch/arm/xen') diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index d4f36eba3499..47acb3613f40 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -12,7 +12,6 @@ #include #include #include -#include #include #include #include @@ -86,19 +85,6 @@ 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_read_wallclock(struct timespec64 *ts) { u32 version; @@ -432,8 +418,8 @@ 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(¶virt_steal_enabled); + xen_time_setup_guest(); + if (xen_initial_domain()) pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier); -- cgit v1.2.3