[PATCH 05/19] xen/x86: Move freeze/thaw_domains into common files

[Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>]

From: Mirela Simonovic <mirela.simonovic@xxxxxxxxxx>

These functions will be reused by suspend/resume support for ARM.

Signed-off-by: Mirela Simonovic <mirela.simonovic@xxxxxxxxxx>
Signed-off-by: Saeed Nowshadi <saeed.nowshadi@xxxxxxxxxx>
---
 xen/common/domain.c     | 29 +++++++++++++++++++++++++++++
 xen/include/xen/sched.h |  3 +++
 2 files changed, 32 insertions(+)

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 56d47dd664..5e5894c468 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -1884,6 +1884,35 @@ int continue_hypercall_on_cpu(
     return 0;
 }
 
+
+void freeze_domains(void)
+{
+    struct domain *d;
+
+    rcu_read_lock(&domlist_read_lock);
+    /*
+     * Note that we iterate in order of domain-id. Hence we will pause dom0
+     * first which is required for correctness (as only dom0 can add domains to
+     * the domain list). Otherwise we could miss concurrently-created domains.
+     */
+    for_each_domain ( d )
+        domain_pause(d);
+    rcu_read_unlock(&domlist_read_lock);
+}
+
+void thaw_domains(void)
+{
+    struct domain *d;
+
+    rcu_read_lock(&domlist_read_lock);
+    for_each_domain ( d )
+    {
+        restore_vcpu_affinity(d);
+        domain_unpause(d);
+    }
+    rcu_read_unlock(&domlist_read_lock);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 00a939aa01..c8ddfdd51c 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -978,6 +978,9 @@ static inline struct vcpu *domain_vcpu(const struct domain 
*d,
     return vcpu_id >= d->max_vcpus ? NULL : d->vcpu[idx];
 }
 
+void freeze_domains(void);
+void thaw_domains(void);
+
 void cpu_init(void);
 
 /*
-- 
2.37.1