| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 125/179] cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs | Date | Mon, 29 Nov 2021 19:18:39 +0100 |
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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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