intelblocks/cpu: Fix wrong comment for P_Req field in PERF_CTL MSR

The mentioned bits 14:8 are wrong as the functions always write
bits 15:8. What happens is visible in the written code. There is no need
for an extra comment.

Change-Id: I59b4d24d01a0a8fa74912f9754e7bbb217ca269d
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/29798
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>

2 files changed, 10 insertions, 10 deletions

diff --git a/src/soc/intel/common/block/cpu/cpulib.c b/src/soc/intel/common/block/cpu/cpulib.c
index f2142d93cc..d18b50cb3f 100644
--- a/src/soc/intel/common/block/cpu/cpulib.c
+++ b/src/soc/intel/common/block/cpu/cpulib.c
@@ -34,7 +34,7 @@
 #include <stdint.h>
 
 /*
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with
+ * Set PERF_CTL MSR (0x199) P_Req with
  * Turbo Ratio which is the Maximum Ratio.
  */
 void cpu_set_max_ratio(void)
@@ -86,7 +86,7 @@ int cpu_config_tdp_levels(void)
  * 23:16 -	MAX_TURBO_3_CORES
  * 31:24 -	MAX_TURBO_4_CORES
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_turbo_ratio(void)
 {
@@ -106,7 +106,7 @@ void cpu_set_p_state_to_turbo_ratio(void)
  * TDP level ratio to be used for specific processor (in units
  * of 100MHz).
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_nominal_tdp_ratio(void)
 {
@@ -125,7 +125,7 @@ void cpu_set_p_state_to_nominal_tdp_ratio(void)
  * PLATFORM_INFO MSR (0xCE) Bits 15:8 tells
  * MAX_NON_TURBO_LIM_RATIO.
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_max_non_turbo_ratio(void)
 {
@@ -142,7 +142,7 @@ void cpu_set_p_state_to_max_non_turbo_ratio(void)
 }
 
 /*
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with the value
+ * Set PERF_CTL MSR (0x199) P_Req with the value
  * for maximum efficiency. This value is reported in PLATFORM_INFO MSR (0xCE)
  * in Bits 47:40 and is extracted with cpu_get_min_ratio().
  */
diff --git a/src/soc/intel/common/block/include/intelblocks/cpulib.h b/src/soc/intel/common/block/include/intelblocks/cpulib.h
index 0d51146752..5cea96e409 100644
--- a/src/soc/intel/common/block/include/intelblocks/cpulib.h
+++ b/src/soc/intel/common/block/include/intelblocks/cpulib.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 /*
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with
+ * Set PERF_CTL MSR (0x199) P_Req with
  * Turbo Ratio which is the Maximum Ratio.
  */
 void cpu_set_max_ratio(void);
@@ -52,7 +52,7 @@ int cpu_config_tdp_levels(void);
  * 23:16 -	MAX_TURBO_3_CORES
  * 31:24 -	MAX_TURBO_4_CORES
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_turbo_ratio(void);
 
@@ -61,7 +61,7 @@ void cpu_set_p_state_to_turbo_ratio(void);
  * TDP level ratio to be used for specific processor (in units
  * of 100MHz).
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_nominal_tdp_ratio(void);
 
@@ -69,12 +69,12 @@ void cpu_set_p_state_to_nominal_tdp_ratio(void);
  * PLATFORM_INFO MSR (0xCE) Bits 15:8 tells
  * MAX_NON_TURBO_LIM_RATIO.
  *
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with that value.
+ * Set PERF_CTL MSR (0x199) P_Req with that value.
  */
 void cpu_set_p_state_to_max_non_turbo_ratio(void);
 
 /*
- * Set PERF_CTL MSR (0x199) P_Req (14:8 bits) with the value
+ * Set PERF_CTL MSR (0x199) P_Req with the value
  * for maximum efficiency. This value is reported in PLATFORM_INFO MSR (0xCE)
  * in Bits 47:40 and is extracted with cpu_get_min_ratio().
  */