linux-kernel - [PATCH 5.15 067/530] powercap: intel_rapl: Use standard Energy Unit for SPR Dram RAPL domain

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Message-Id: <20221024113048.056179720@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:26:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
        Wang Wendy <wendy.wang@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 5.15 067/530] powercap: intel_rapl: Use standard Energy Unit for SPR Dram RAPL domain

From: Zhang Rui <rui.zhang@...el.com>

commit 4c081324df5608b73428662ca54d5221ea03a6bd upstream.

Intel Xeon servers used to use a fixed energy resolution (15.3uj) for
Dram RAPL domain. But on SPR, Dram RAPL domain follows the standard
energy resolution as described in MSR_RAPL_POWER_UNIT.

Remove the SPR dram_domain_energy_unit quirk.

Fixes: 2d798d9f5967 ("powercap: intel_rapl: add support for Sapphire Rapids")
Signed-off-by: Zhang Rui <rui.zhang@...el.com>
Tested-by: Wang Wendy <wendy.wang@...el.com>
Cc: 5.9+ <stable@...r.kernel.org> # 5.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/powercap/intel_rapl_common.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -979,7 +979,6 @@ static const struct rapl_defaults rapl_d
 	.check_unit = rapl_check_unit_core,
 	.set_floor_freq = set_floor_freq_default,
 	.compute_time_window = rapl_compute_time_window_core,
-	.dram_domain_energy_unit = 15300,
 	.psys_domain_energy_unit = 1000000000,
 };