xen/vcpu: Fix vcpu restore path.

The runstate of vcpu should be restored for all possible cpus, as well as the
vcpu info placement.

Acked-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 3aeaa93..138e566 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -193,10 +193,11 @@ void xen_vcpu_restore(void)
 {
        int cpu;
 
-       for_each_online_cpu(cpu) {
+       for_each_possible_cpu(cpu) {
                bool other_cpu = (cpu != smp_processor_id());
+               bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL);
 
-               if (other_cpu &&
+               if (other_cpu && is_up &&
                    HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
                        BUG();
 
@@ -205,7 +206,7 @@ void xen_vcpu_restore(void)
                if (have_vcpu_info_placement)
                        xen_vcpu_setup(cpu);
 
-               if (other_cpu &&
+               if (other_cpu && is_up &&
                    HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
                        BUG();
        }