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| author | Len Brown <len.brown@intel.com> | 2012-06-01 19:45:32 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-12-06 11:20:38 +0000 |
| commit | 9f1c9393d2433fa745eae6b5eabe1acef3ec5baa (patch) | |
| tree | 59c1b0021da4485c8df0ae9f81c35c99630ed37f | |
| parent | 704f66592067ef19abb87da6fd43a59e34823122 (diff) | |
| download | lwn-9f1c9393d2433fa745eae6b5eabe1acef3ec5baa.tar.gz lwn-9f1c9393d2433fa745eae6b5eabe1acef3ec5baa.zip | |
intel_idle: initial IVB support
commit 6edab08c24f9141d69cfa4683a0a027d86ab303e upstream.
From an OS point of view, IVB looks like SNB, but quicker.
Signed-off-by: Len Brown <len.brown@intel.com>
[bwh: Backported to 3.2: add model number to the switch in
intel_idle_probe(), as there is no device ID table]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/idle/intel_idle.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 5b39216ff0df..26e7b38a6232 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -163,6 +163,38 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = { .enter = &intel_idle }, }; +static struct cpuidle_state ivb_cstates[MWAIT_MAX_NUM_CSTATES] = { + { /* MWAIT C0 */ }, + { /* MWAIT C1 */ + .name = "C1-IVB", + .desc = "MWAIT 0x00", + .flags = CPUIDLE_FLAG_TIME_VALID, + .exit_latency = 1, + .target_residency = 1, + .enter = &intel_idle }, + { /* MWAIT C2 */ + .name = "C3-IVB", + .desc = "MWAIT 0x10", + .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 59, + .target_residency = 156, + .enter = &intel_idle }, + { /* MWAIT C3 */ + .name = "C6-IVB", + .desc = "MWAIT 0x20", + .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 80, + .target_residency = 300, + .enter = &intel_idle }, + { /* MWAIT C4 */ + .name = "C7-IVB", + .desc = "MWAIT 0x30", + .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED, + .exit_latency = 87, + .target_residency = 300, + .enter = &intel_idle }, +}; + static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = { { /* MWAIT C0 */ }, { /* MWAIT C1 */ @@ -386,6 +418,10 @@ static int intel_idle_probe(void) cpuidle_state_table = snb_cstates; break; + case 0x3A: /* IVB */ + cpuidle_state_table = ivb_cstates; + break; + default: pr_debug(PREFIX "does not run on family %d model %d\n", boot_cpu_data.x86, boot_cpu_data.x86_model); |