linux-kernel - [tip:x86/topology] hwmon/coretemp: Support multi-die/package

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Date:   Thu, 23 May 2019 02:29:03 -0700
From:   tip-bot for Zhang Rui <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux@...ck-us.net, peterz@...radead.org,
        linux-kernel@...r.kernel.org, len.brown@...el.com,
        tglx@...utronix.de, rui.zhang@...el.com, mingo@...nel.org,
        hpa@...or.com
Subject: [tip:x86/topology] hwmon/coretemp: Support multi-die/package

Commit-ID:  cfcd82e632882372db960b50782a439a8ba56c09
Gitweb:     https://git.kernel.org/tip/cfcd82e632882372db960b50782a439a8ba56c09
Author:     Zhang Rui <rui.zhang@...el.com>
AuthorDate: Mon, 13 May 2019 13:58:54 -0400
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 23 May 2019 10:08:33 +0200

hwmon/coretemp: Support multi-die/package

Package temperature sensors are actually implemented in hardware per-die.

Update coretemp to be "die-aware", so it can expose mulitple sensors per
package, instead of just one.  No change to single-die/package systems.

Signed-off-by: Zhang Rui <rui.zhang@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Guenter Roeck <linux@...ck-us.net>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: linux-pm@...r.kernel.org
Cc: linux-hwmon@...r.kernel.org
Link: https://lkml.kernel.org/r/ec2868f35113a01ff72d9041e0b97fc6a1c7df84.1557769318.git.len.brown@intel.com

---
 drivers/hwmon/coretemp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 5d34f7271e67..c64ce32d3214 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -435,7 +435,7 @@ static int chk_ucode_version(unsigned int cpu)
 
 static struct platform_device *coretemp_get_pdev(unsigned int cpu)
 {
-	int pkgid = topology_logical_package_id(cpu);
+	int pkgid = topology_logical_die_id(cpu);
 
 	if (pkgid >= 0 && pkgid < max_packages)
 		return pkg_devices[pkgid];
@@ -579,7 +579,7 @@ static struct platform_driver coretemp_driver = {
 
 static struct platform_device *coretemp_device_add(unsigned int cpu)
 {
-	int err, pkgid = topology_logical_package_id(cpu);
+	int err, pkgid = topology_logical_die_id(cpu);
 	struct platform_device *pdev;
 
 	if (pkgid < 0)
@@ -703,7 +703,7 @@ static int coretemp_cpu_offline(unsigned int cpu)
 	 * the rest.
 	 */
 	if (cpumask_empty(&pd->cpumask)) {
-		pkg_devices[topology_logical_package_id(cpu)] = NULL;
+		pkg_devices[topology_logical_die_id(cpu)] = NULL;
 		platform_device_unregister(pdev);
 		return 0;
 	}
@@ -741,7 +741,7 @@ static int __init coretemp_init(void)
 	if (!x86_match_cpu(coretemp_ids))
 		return -ENODEV;
 
-	max_packages = topology_max_packages();
+	max_packages = topology_max_packages() * topology_max_die_per_package();
 	pkg_devices = kcalloc(max_packages, sizeof(struct platform_device *),
 			      GFP_KERNEL);
 	if (!pkg_devices)