[ 88/89] intel_idle: initial IVB support
From: Ben Hutchings <hidden>
Date: 2012-12-03 14:55:43
Also in:
lkml
3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Len Brown <redacted> commit 6edab08c24f9141d69cfa4683a0a027d86ab303e upstream.
quoted
From an OS point of view, IVB looks like SNB, but quicker.
Signed-off-by: Len Brown <redacted> [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 <redacted> --- drivers/idle/intel_idle.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+)
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c@@ -163,6 +163,38 @@ static struct cpuidle_state snb_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);