From: Yicong Yang <yangyic...@hisilicon.com>
On building the topology from the devicetree, we've already
gotten the SMT thread number of each core. Update the largest
SMT thread number to enable the SMT control.
Signed-off-by: Yicong Yang <yangyic...@hisilicon.com>
---
drivers/base/arch_topology.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 75fcb75d5515..95513abd664f 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -11,6 +11,7 @@
#include <linux/cleanup.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
+#include <linux/cpu_smt.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/slab.h>
@@ -531,6 +532,16 @@ static int __init get_cpu_for_node(struct device_node
*node)
return cpu;
}
+static void __init update_smt_num_threads(unsigned int num_threads)
+{
+ static unsigned int max_smt_thread_num = 1;
+
+ if (num_threads > max_smt_thread_num) {
+ max_smt_thread_num = num_threads;
+ cpu_smt_set_num_threads(max_smt_thread_num, max_smt_thread_num);
+ }
+}
+
static int __init parse_core(struct device_node *core, int package_id,
int cluster_id, int core_id)
{
@@ -561,6 +572,8 @@ static int __init parse_core(struct device_node *core, int
package_id,
i++;
} while (1);
+ update_smt_num_threads(i);
+
cpu = get_cpu_for_node(core);
if (cpu >= 0) {
if (!leaf) {
--
2.24.0
