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From:   Len Brown <lenb@kernel.org>
To:     x86@kernel.org
Cc:     linux-kernel@vger.kernel.org, Zhang Rui <rui.zhang@intel.com>,
        Len Brown <len.brown@intel.com>, linux-pm@vger.kernel.org
Subject: [PATCH 08/11] powercap/intel_rapl: Support multi-die/package
Date:   Mon, 18 Feb 2019 22:40:10 -0500
Message-Id: <3349c9e551eecbfe849320c0e938daf4e0126734.1550545163.git.len.brown@intel.com>
In-Reply-To: <635b2bf8b1151a191cd9299276b75791a818c0c2.1550545163.git.len.brown@intel.com>
References: <635b2bf8b1151a191cd9299276b75791a818c0c2.1550545163.git.len.brown@intel.com>
Reply-To: Len Brown <lenb@kernel.org>
Organization: Intel Open Source Technology Center
Sender: linux-kernel-owner@vger.kernel.org
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From: Zhang Rui <rui.zhang@intel.com>

On the new dual-die/package systems, the RAPL MSR becomes die-scope.
Thus instead of one powercap device per physical package, now there
should be one powercap device for each unique die on these systems.

This patch introduces intel_rapl driver support for new
dual-die/package systems.

On the hardwares that do not have multi-die, topology_unique_die_id()
equals topology_physical_package_id(), thus there is no functional change.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/powercap/intel_rapl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c
index 6057d9695fed..e004707283da 100644
--- a/drivers/powercap/intel_rapl.c
+++ b/drivers/powercap/intel_rapl.c
@@ -266,7 +266,7 @@ static struct rapl_domain *platform_rapl_domain; /* Platform (PSys) domain */
 /* caller to ensure CPU hotplug lock is held */
 static struct rapl_package *rapl_find_package(int cpu)
 {
-	int id = topology_physical_package_id(cpu);
+	int id = topology_unique_die_id(cpu);
 	struct rapl_package *rp;
 
 	list_for_each_entry(rp, &rapl_packages, plist) {
@@ -1457,7 +1457,7 @@ static void rapl_remove_package(struct rapl_package *rp)
 /* called from CPU hotplug notifier, hotplug lock held */
 static struct rapl_package *rapl_add_package(int cpu)
 {
-	int id = topology_physical_package_id(cpu);
+	int id = topology_unique_die_id(cpu);
 	struct rapl_package *rp;
 	int ret;
 
-- 
2.18.0-rc0