From: Mario Limonciello <mario.limonciello@xxxxxxx>
arch_init_invariance_cppc() is called at the end of
acpi_cppc_processor_probe() in order to configure frequency invariance
based upon the values from _CPC.
This however doesn't work on AMD CPPC shared memory designs that have
AMD preferred cores enabled because _CPC needs to be analyzed from all
cores to judge if preferred cores are enabled.
This issue manifests to users as a warning since commit 21fb59ab4b97
("ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn"):
```
Could not retrieve highest performance (-19)
```
However the warning isn't the cause of this, it was actually
commit 279f838a61f9 ("x86/amd: Detect preferred cores in
amd_get_boost_ratio_numerator()") which exposed the issue.
To fix this problem, push the call to the arch_init_invariance_cppc()
macro to the end of acpi_processor_driver_init().
Fixes: 279f838a61f9 ("x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()")
Reported-by: Ivan Shapovalov <intelfx@xxxxxxxxxxxx>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219431
Tested-by: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/acpi/cppc_acpi.c | 2 --
drivers/acpi/processor_driver.c | 1 +
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index c3fc2c05d8687..f8614771bf32b 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -905,8 +905,6 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
goto out_free;
}
- arch_init_invariance_cppc();
-
kfree(output.pointer);
return 0;
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index cb52dd000b958..59620e7bc6647 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -270,6 +270,7 @@ static int __init acpi_processor_driver_init(void)
NULL, acpi_soft_cpu_dead);
acpi_processor_throttling_init();
+ arch_init_invariance_cppc();
return 0;
err:
driver_unregister(&acpi_processor_driver);
--
2.43.0
