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From: Daniel Tang <danielzgtg.opensource@gmail.com>
To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Cc: Zhang Rui <rui.zhang@intel.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>,
	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake
Date: Wed, 14 Jan 2026 21:01:52 -0500	[thread overview]
Message-ID: <6088605.ChMirdbgyp@daniel-desktop3> (raw)

Microsoft Surface Pro 7 firmware throttles the processor upon
boot/resume. Userspace needs to be able to restore the correct value.

Link: https://github.com/linux-surface/linux-surface/issues/706
Signed-off-by: Daniel Tang <danielzgtg.opensource@gmail.com>
---
 drivers/powercap/intel_rapl_msr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c
index 9a7e150b3536..a2bc0a9c1e10 100644
--- a/drivers/powercap/intel_rapl_msr.c
+++ b/drivers/powercap/intel_rapl_msr.c
@@ -162,6 +162,7 @@ static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
 
 /* List of verified CPUs. */
 static const struct x86_cpu_id pl4_support_ids[] = {
+	X86_MATCH_VFM(INTEL_ICELAKE_L, NULL),
 	X86_MATCH_VFM(INTEL_TIGERLAKE_L, NULL),
 	X86_MATCH_VFM(INTEL_ALDERLAKE, NULL),
 	X86_MATCH_VFM(INTEL_ALDERLAKE_L, NULL),
-- 
2.51.0




             reply	other threads:[~2026-01-15  2:01 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-15  2:01 Daniel Tang [this message]
2026-01-15 20:16 ` [PATCH] powercap: intel_rapl: Add PL4 support for Ice Lake Rafael J. Wysocki

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