sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cpu/intel/model_206ax: Allow turbo boost ratio limit configuration

Browse Source 
Tested on ThinkPad T420 with the i7-3940XM.

Change-Id: I1c65a129478e8ac2c4f66eb3c6aa2507358f82ad
Signed-off-by: Anastasios Koutian <akoutian2@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83271
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Anastasios Koutian
2024-05-10 20:10:04 +03:00
committed by Nico Huber
parent 3dbf0c5c5f
commit 3c9944ea41
3 changed files with 40 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/cpu/intel/model_206ax/chip.h
View File

@@ -38,6 +38,17 @@ struct psi_state {
int current; /* In Amps */
};
union turbo_ratio_limits {
/* Limit for 1, 2, 3 and 4 active cores respectively */
struct {
int limit_1c;
int limit_2c;
int limit_3c;
int limit_4c;
};
int raw[4];
};
struct cpu_intel_model_206ax_config {
enum cpu_acpi_level acpi_c1;
enum cpu_acpi_level acpi_c2;
@@ -56,6 +67,8 @@ struct cpu_intel_model_206ax_config {
/* PSI states only have an effect when in Package C3 or higher */
struct psi_state pp0_psi[3]; /* Power states for Primary Plane (Icc) */
struct psi_state pp1_psi[3]; /* Power states for Secondary Plane (IAXG) */
union turbo_ratio_limits turbo_limits; /* Turbo ratio limits depending on the number of active cores */
};
#endif /* __CPU_INTEL_MODEL_206AX_CHIP_H__ */

1
src/cpu/intel/model_206ax/model_206ax.h
View File

@@ -46,6 +46,7 @@
#define MSR_LT_LOCK_MEMORY 0x2e7
#define MSR_PLATFORM_INFO 0xce
#define PLATFORM_INFO_SET_TDP (1 << 29)
#define PLATFORM_INFO_SET_TURBO_LIMIT (1 << 28)
#define MSR_MISC_PWR_MGMT 0x1aa
#define MISC_PWR_MGMT_EIST_HW_DIS (1 << 0)

26
src/cpu/intel/model_206ax/model_206ax_init.c
View File

@@ -11,6 +11,7 @@
#include <cpu/intel/turbo.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/name.h>
#include "commonlib/bsd/helpers.h"
#include "model_206ax.h"
#include "chip.h"
#include <cpu/intel/smm_reloc.h>
@@ -175,6 +176,23 @@ void set_power_limits(u8 power_limit_1_time)
}
}
static void configure_turbo_ratio_limits(struct cpu_intel_model_206ax_config *conf)
{
msr_t msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
for (int i = 0; i < ARRAY_SIZE(conf->turbo_limits.raw); i++) {
const int shift = i * 8;
const int limit = conf->turbo_limits.raw[i];
if (limit) {
msr.lo &= ~(0xff << shift);
msr.lo |= (limit << shift);
}
}
wrmsr(MSR_TURBO_RATIO_LIMIT, msr);
}
static void configure_c_states(struct device *dev)
{
struct cpu_intel_model_206ax_config *conf = dev->upstream->dev->chip_info;
@@ -298,6 +316,14 @@ static void configure_c_states(struct device *dev)
msr.lo |= PP1_CURRENT_LIMIT_LOCK;
wrmsr(MSR_PP1_CURRENT_CONFIG, msr);
}
msr = rdmsr(MSR_PLATFORM_INFO);
if (msr.lo & PLATFORM_INFO_SET_TURBO_LIMIT) {
configure_turbo_ratio_limits(conf);
} else {
printk(BIOS_INFO, "%s: Programmable ratio limit for turbo mode is disabled\n",
dev_path(dev));
}
}
static void configure_thermal_target(struct device *dev)