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Subject[PATCH 5.15 125/179] cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs
Date
From: Adamos Ttofari <attofari@amazon.de>

[ Upstream commit cd23f02f166892603eb9f2d488152b975872b682 ]

Commit fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers
support in no-HWP mode") enabled the use of Intel P-State driver
for Ice Lake servers.

But it doesn't cover the case when OS can't control P-States.

Therefore, for Ice Lake server, if MSR_MISC_PWR_MGMT bits 8 or 18
are enabled, then the Intel P-State driver should exit as OS can't
control P-States.

Fixes: fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode")
Signed-off-by: Adamos Ttofari <attofari@amazon.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.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 3e56a4a1d1d3a..e15c3bc17a55c 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2255,6 +2255,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
X86_MATCH(BROADWELL_D, core_funcs),
X86_MATCH(BROADWELL_X, core_funcs),
X86_MATCH(SKYLAKE_X, core_funcs),
+ X86_MATCH(ICELAKE_X, core_funcs),
{}
};

--
2.33.0


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