xen: re-register runstate area earlier on resume.
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>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index dfbf70e..cb61f77 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -148,6 +148,8 @@
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
BUG();
+ xen_setup_runstate_info(cpu);
+
xen_vcpu_setup(cpu);
if (other_cpu &&
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 0a5aa44..6bbff94 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -100,7 +100,7 @@
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 @@
evt->cpumask = cpumask_of(cpu);
evt->irq = irq;
-
- setup_runstate_info(cpu);
}
void xen_teardown_timer(int cpu)
@@ -494,6 +492,7 @@
setup_force_cpu_cap(X86_FEATURE_TSC);
+ xen_setup_runstate_info(cpu);
xen_setup_timer(cpu);
xen_setup_cpu_clockevents();
}
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 355fa6b..3252932 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -41,6 +41,7 @@
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);