linux-kernel - [PATCH AUTOSEL 5.15 07/15] cpufreq: intel_pstate: Add Tigerlake support in no-HWP mode

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Message-Id: <20221009205308.1202627-7-sashal@kernel.org>
Date:   Sun,  9 Oct 2022 16:53:00 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Doug Smythies <dsmythies@...us.net>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Sasha Levin <sashal@...nel.org>,
        srinivas.pandruvada@...ux.intel.com, lenb@...nel.org,
        rafael@...nel.org, linux-pm@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 07/15] cpufreq: intel_pstate: Add Tigerlake support in no-HWP mode

From: Doug Smythies <dsmythies@...us.net>

[ Upstream commit 71bb5c82aaaea007167f3ba68d3a669c74d7d55d ]

Users may disable HWP in firmware, in which case intel_pstate wouldn't load
unless the CPU model is explicitly supported.

Add TIGERLAKE to the list of CPUs that can register intel_pstate while not
advertising the HWP capability. Without this change, an TIGERLAKE in no-HWP
mode could only use the acpi_cpufreq frequency scaling driver.

See also commits:
d8de7a44e11f: cpufreq: intel_pstate: Add Skylake servers support
fbdc21e9b038: cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode
706c5328851d: cpufreq: intel_pstate: Add Cometlake support in no-HWP mode

Reported by: M. Cargi Ari <cagriari@...me>
Signed-off-by: Doug Smythies <dsmythies@...us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 8a2c6b58b652..c57229c108a7 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2257,6 +2257,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
 	X86_MATCH(SKYLAKE_X,		core_funcs),
 	X86_MATCH(COMETLAKE,		core_funcs),
 	X86_MATCH(ICELAKE_X,		core_funcs),
+	X86_MATCH(TIGERLAKE,		core_funcs),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
-- 
2.35.1