From: Luca Fancellu <luca.fancellu@arm.com>
Date: Fri, 6 May 2022 12:00:07 +0000 (+0100)
Subject: xen/sched: create public function for cpupools creation
X-Git-Tag: archive/raspbian/4.17.0-1+rpi1^2~33^2~659
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a32769dd2469ee4aeaa6371b7a4e1e52d0e0226e;p=xen.git

xen/sched: create public function for cpupools creation

Create new public function to create cpupools, can take as parameter
the scheduler id or a negative value that means the default Xen
scheduler will be used.

Signed-off-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
---

diff --git a/xen/common/sched/cpupool.c b/xen/common/sched/cpupool.c
index a6da497050..89a891af70 100644
--- a/xen/common/sched/cpupool.c
+++ b/xen/common/sched/cpupool.c
@@ -1219,6 +1219,21 @@ static void cpupool_hypfs_init(void)
 
 #endif /* CONFIG_HYPFS */
 
+struct cpupool *__init cpupool_create_pool(unsigned int pool_id, int sched_id)
+{
+    struct cpupool *pool;
+
+    if ( sched_id < 0 )
+        sched_id = scheduler_get_default()->sched_id;
+
+    pool = cpupool_create(pool_id, sched_id);
+
+    BUG_ON(IS_ERR(pool));
+    cpupool_put(pool);
+
+    return pool;
+}
+
 static int __init cf_check cpupool_init(void)
 {
     unsigned int cpu;
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 6b724e7947..a0c87169d9 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -1158,6 +1158,22 @@ int cpupool_move_domain(struct domain *d, struct cpupool *c);
 int cpupool_do_sysctl(struct xen_sysctl_cpupool_op *op);
 unsigned int cpupool_get_id(const struct domain *d);
 const cpumask_t *cpupool_valid_cpus(const struct cpupool *pool);
+
+/*
+ * cpupool_create_pool - Creates a cpupool
+ * @pool_id: id of the pool to be created
+ * @sched_id: id of the scheduler to be used for the pool
+ *
+ * Creates a cpupool with pool_id id.
+ * The sched_id parameter identifies the scheduler to be used, if it is
+ * negative, the default scheduler of Xen will be used.
+ *
+ * returns:
+ *     pointer to the struct cpupool just created, or Xen will panic in case of
+ *     error
+ */
+struct cpupool *cpupool_create_pool(unsigned int pool_id, int sched_id);
+
 extern void cf_check dump_runq(unsigned char key);
 
 void arch_do_physinfo(struct xen_sysctl_physinfo *pi);