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xen: re-register runstate area earlier on resume.

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This is necessary to ensure the runstate area is available to
xen_sched_clock before any calls to printk which will require it in
order to provide a timestamp.

I chose to pull the xen_setup_runstate_info out of xen_time_init into
the caller in order to maintain parity with calling
xen_setup_runstate_info separately from calling xen_time_resume.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>
This commit is contained in:
Ian Campbell 2009-11-21 08:35:55 +08:00 committed by Jeremy Fitzhardinge
parent ae78880129
commit be012920ec
3 changed files with 5 additions and 3 deletions
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2
arch/x86/xen/enlighten.c
View File

@ -148,6 +148,8 @@ void xen_vcpu_restore(void)
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
BUG();
xen_setup_runstate_info(cpu);
xen_vcpu_setup(cpu);
if (other_cpu &&

5
arch/x86/xen/time.c
View File

@ -100,7 +100,7 @@ bool xen_vcpu_stolen(int vcpu)
return per_cpu(runstate, vcpu).state == RUNSTATE_runnable;
}
static void setup_runstate_info(int cpu)
void xen_setup_runstate_info(int cpu)
{
struct vcpu_register_runstate_memory_area area;
@ -442,8 +442,6 @@ void xen_setup_timer(int cpu)
evt->cpumask = cpumask_of(cpu);
evt->irq = irq;
setup_runstate_info(cpu);
}
void xen_teardown_timer(int cpu)
@ -494,6 +492,7 @@ __init void xen_time_init(void)
setup_force_cpu_cap(X86_FEATURE_TSC);
xen_setup_runstate_info(cpu);
xen_setup_timer(cpu);
xen_setup_cpu_clockevents();
}

1
arch/x86/xen/xen-ops.h
View File

@ -41,6 +41,7 @@ void __init xen_build_dynamic_phys_to_machine(void);
void xen_init_irq_ops(void);
void xen_setup_timer(int cpu);
void xen_setup_runstate_info(int cpu);
void xen_teardown_timer(int cpu);
cycle_t xen_clocksource_read(void);
void xen_setup_cpu_clockevents(void);