cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs
authorAdamos Ttofari <attofari@amazon.de>
Fri, 12 Nov 2021 09:16:57 +0000 (09:16 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 1 Dec 2021 08:04:51 +0000 (09:04 +0100)
commitd10ecfd9518e35eb33ab42531cb4fb41809db8d9
tree7ab145e286533398fbb3500874ab1fcf34c148af
parent57e91396455e7c06012ecde014b4dca3d3393008
cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs

[ 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