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[2/4,H/linux-azure] cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode

Message ID 20211126161321.10965-3-bartlomiej.zolnierkiewicz@canonical.com
State New
Headers show
Series add Icelake servers support in no-HWP mode to cpufreq/intel_pstate driver | expand

Commit Message

Bartlomiej Zolnierkiewicz Nov. 26, 2021, 4:13 p.m. UTC 
From: Giovanni Gherdovich <ggherdovich@suse.cz>

BugLink: https://bugs.launchpad.net/bugs/1952234

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

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

See also commit d8de7a44e11f ("cpufreq: intel_pstate: Add Skylake servers
support").

Signed-off-by: Giovanni Gherdovich <ggherdovich@suse.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit fbdc21e9b038d00d0d56fa4e0f7701d42ae08f00)
Signed-off-by: Bartlomiej Zolnierkiewicz <bartlomiej.zolnierkiewicz@canonical.com>
---
 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 008d06193f32..73646b0b6340 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2090,6 +2090,7 @@  static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
 	X86_MATCH(ATOM_GOLDMONT,	core_funcs),
 	X86_MATCH(ATOM_GOLDMONT_PLUS,	core_funcs),
 	X86_MATCH(SKYLAKE_X,		core_funcs),
+	X86_MATCH(ICELAKE_X,		core_funcs),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);