diff options
| author | Vaibhav Shankar <vaibhav.shankar@intel.com> | 2018-01-11 10:27:50 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-01-23 05:43:10 +0000 |
| commit | 66dbb0c5d67279722fcbcb547d9c6b61e606d50e (patch) | |
| tree | df3a9d8318ff4e170fa2192678d6ff8682975b3b /src/soc | |
| parent | 73f19dca386d775a880bdc945efaa6b9c77d9e94 (diff) | |
src/soc/intel/cannonlake: Update C-state latency control limits
PC10 is a necessary condition for S0ix entry. With the current C-state limits,
CPU fails to enter PC10 during S0ix. C-state Latency control limits
have to be tuned to new values for PC10 entry.
Change-Id: I0f5227f9c3c10c5a9e335ab118eb0ec185445374
Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Reviewed-on: https://review.coreboot.org/23220
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/cannonlake/cpu.c | 15 | ||||
| -rw-r--r-- | src/soc/intel/cannonlake/include/soc/cpu.h | 14 |
2 files changed, 12 insertions, 17 deletions
diff --git a/src/soc/intel/cannonlake/cpu.c b/src/soc/intel/cannonlake/cpu.c index 728ab9c379..a0797bc9c8 100644 --- a/src/soc/intel/cannonlake/cpu.c +++ b/src/soc/intel/cannonlake/cpu.c @@ -136,36 +136,31 @@ static void configure_c_states(void) { msr_t msr; - /* C-state Interrupt Response Latency Control 0 - package C3 latency */ - msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_0_LIMIT; - wrmsr(MSR_C_STATE_LATENCY_CONTROL_0, msr); - /* C-state Interrupt Response Latency Control 1 - package C6/C7 short */ msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_1_LIMIT; + msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_1_LIMIT; wrmsr(MSR_C_STATE_LATENCY_CONTROL_1, msr); /* C-state Interrupt Response Latency Control 2 - package C6/C7 long */ msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_2_LIMIT; + msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_2_LIMIT; wrmsr(MSR_C_STATE_LATENCY_CONTROL_2, msr); /* C-state Interrupt Response Latency Control 3 - package C8 */ msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | + msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_3_LIMIT; wrmsr(MSR_C_STATE_LATENCY_CONTROL_3, msr); /* C-state Interrupt Response Latency Control 4 - package C9 */ msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | + msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_4_LIMIT; wrmsr(MSR_C_STATE_LATENCY_CONTROL_4, msr); /* C-state Interrupt Response Latency Control 5 - package C10 */ msr.hi = 0; - msr.lo = IRTL_VALID | IRTL_1024_NS | + msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_5_LIMIT; wrmsr(MSR_C_STATE_LATENCY_CONTROL_5, msr); } diff --git a/src/soc/intel/cannonlake/include/soc/cpu.h b/src/soc/intel/cannonlake/include/soc/cpu.h index bde8f28f1a..dfc7183910 100644 --- a/src/soc/intel/cannonlake/include/soc/cpu.h +++ b/src/soc/intel/cannonlake/include/soc/cpu.h @@ -21,13 +21,13 @@ #include <device/device.h> #include <intelblocks/msr.h> -/* Latency times in units of 1024ns. */ -#define C_STATE_LATENCY_CONTROL_0_LIMIT 0x4e -#define C_STATE_LATENCY_CONTROL_1_LIMIT 0x76 -#define C_STATE_LATENCY_CONTROL_2_LIMIT 0x94 -#define C_STATE_LATENCY_CONTROL_3_LIMIT 0xfa -#define C_STATE_LATENCY_CONTROL_4_LIMIT 0x14c -#define C_STATE_LATENCY_CONTROL_5_LIMIT 0x3f2 +/* Latency times in units of 32768ns */ +#define C_STATE_LATENCY_CONTROL_0_LIMIT 0x9d +#define C_STATE_LATENCY_CONTROL_1_LIMIT 0x9d +#define C_STATE_LATENCY_CONTROL_2_LIMIT 0x9d +#define C_STATE_LATENCY_CONTROL_3_LIMIT 0x9d +#define C_STATE_LATENCY_CONTROL_4_LIMIT 0x9d +#define C_STATE_LATENCY_CONTROL_5_LIMIT 0x9d /* Power in units of mW */ #define C1_POWER 0x3e8 |