[PATCH 5/6] intel_idle: Add ->enter_freeze callbacks

From: Rafael J. Wysocki
Date: Tue Feb 10 2015 - 22:44:59 EST

Next message: Serge E. Hallyn: "Re: [PATCHv3 8/8] cgroup: Add documentation for cgroup namespaces"
Previous message: Rafael J. Wysocki: "[PATCH 4/6] PM / sleep: Make it possible to quiesce timers during suspend-to-idle"
In reply to: Rafael J. Wysocki: "[Update][PATCH 4/6 v2] PM / sleep: Make it possible to quiesce timers during suspend-to-idle"
Next in thread: Peter Zijlstra: "Re: [PATCH 5/6] intel_idle: Add ->enter_freeze callbacks"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

Add an ->enter_freeze callback routine, intel_idle_freeze(), to
the intel_idle driver and point the ->enter_freeze callback
pointers of all of the driver's state objects to it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/idle/intel_idle.c | 179 ++++++++++++++++++++++++++++++++--------------
1 file changed, 125 insertions(+), 54 deletions(-)

Index: linux-pm/drivers/idle/intel_idle.c
===================================================================
--- linux-pm.orig/drivers/idle/intel_idle.c
+++ linux-pm/drivers/idle/intel_idle.c
@@ -97,6 +97,8 @@ static const struct idle_cpu *icpu;
static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
static int intel_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index);
+static void intel_idle_freeze(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index);
static int intel_idle_cpu_init(int cpu);

static struct cpuidle_state *cpuidle_state_table;
@@ -131,28 +133,32 @@ static struct cpuidle_state nehalem_csta
.flags = MWAIT2flg(0x00),
.exit_latency = 3,
.target_residency = 6,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-NHM",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-NHM",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 20,
.target_residency = 80,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-NHM",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 200,
.target_residency = 800,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -164,35 +170,40 @@ static struct cpuidle_state snb_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 2,
.target_residency = 2,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-SNB",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-SNB",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 80,
.target_residency = 211,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-SNB",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 104,
.target_residency = 345,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7-SNB",
.desc = "MWAIT 0x30",
.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 109,
.target_residency = 345,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -204,42 +215,48 @@ static struct cpuidle_state byt_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 1,
.target_residency = 1,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-BYT",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 15,
.target_residency = 30,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6N-BYT",
.desc = "MWAIT 0x58",
.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 40,
.target_residency = 275,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6S-BYT",
.desc = "MWAIT 0x52",
.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 140,
.target_residency = 560,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7-BYT",
.desc = "MWAIT 0x60",
.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 1200,
.target_residency = 1500,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7S-BYT",
.desc = "MWAIT 0x64",
.flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 10000,
.target_residency = 20000,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -251,35 +268,40 @@ static struct cpuidle_state ivb_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 1,
.target_residency = 1,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-IVB",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-IVB",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 59,
.target_residency = 156,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-IVB",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 80,
.target_residency = 300,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7-IVB",
.desc = "MWAIT 0x30",
.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 87,
.target_residency = 300,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -291,28 +313,32 @@ static struct cpuidle_state ivt_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 1,
.target_residency = 1,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-IVT",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 80,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-IVT",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 59,
.target_residency = 156,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-IVT",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 82,
.target_residency = 300,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -324,28 +350,32 @@ static struct cpuidle_state ivt_cstates_
.flags = MWAIT2flg(0x00),
.exit_latency = 1,
.target_residency = 1,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-IVT-4S",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 250,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-IVT-4S",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 59,
.target_residency = 300,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-IVT-4S",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 84,
.target_residency = 400,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -357,28 +387,32 @@ static struct cpuidle_state ivt_cstates_
.flags = MWAIT2flg(0x00),
.exit_latency = 1,
.target_residency = 1,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-IVT-8S",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 500,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-IVT-8S",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 59,
.target_residency = 600,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-IVT-8S",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 88,
.target_residency = 700,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -390,56 +424,64 @@ static struct cpuidle_state hsw_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 2,
.target_residency = 2,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-HSW",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-HSW",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 33,
.target_residency = 100,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-HSW",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 133,
.target_residency = 400,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7s-HSW",
.desc = "MWAIT 0x32",
.flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 166,
.target_residency = 500,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C8-HSW",
.desc = "MWAIT 0x40",
.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 300,
.target_residency = 900,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C9-HSW",
.desc = "MWAIT 0x50",
.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 600,
.target_residency = 1800,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C10-HSW",
.desc = "MWAIT 0x60",
.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 2600,
.target_residency = 7700,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -450,56 +492,64 @@ static struct cpuidle_state bdw_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 2,
.target_residency = 2,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C1E-BDW",
.desc = "MWAIT 0x01",
.flags = MWAIT2flg(0x01),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C3-BDW",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 40,
.target_residency = 100,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-BDW",
.desc = "MWAIT 0x20",
.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 133,
.target_residency = 400,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C7s-BDW",
.desc = "MWAIT 0x32",
.flags = MWAIT2flg(0x32) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 166,
.target_residency = 500,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C8-BDW",
.desc = "MWAIT 0x40",
.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 300,
.target_residency = 900,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C9-BDW",
.desc = "MWAIT 0x50",
.flags = MWAIT2flg(0x50) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 600,
.target_residency = 1800,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C10-BDW",
.desc = "MWAIT 0x60",
.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 2600,
.target_residency = 7700,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -511,28 +561,32 @@ static struct cpuidle_state atom_cstates
.flags = MWAIT2flg(0x00),
.exit_latency = 10,
.target_residency = 20,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C2-ATM",
.desc = "MWAIT 0x10",
.flags = MWAIT2flg(0x10),
.exit_latency = 20,
.target_residency = 80,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C4-ATM",
.desc = "MWAIT 0x30",
.flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 100,
.target_residency = 400,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-ATM",
.desc = "MWAIT 0x52",
.flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 140,
.target_residency = 560,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -543,14 +597,16 @@ static struct cpuidle_state avn_cstates[
.flags = MWAIT2flg(0x00),
.exit_latency = 2,
.target_residency = 2,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.name = "C6-AVN",
.desc = "MWAIT 0x51",
.flags = MWAIT2flg(0x51) | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 15,
.target_residency = 45,
- .enter = &intel_idle },
+ .enter = &intel_idle,
+ .enter_freeze = intel_idle_freeze, },
{
.enter = NULL }
};
@@ -592,6 +648,21 @@ static int intel_idle(struct cpuidle_dev
return index;
}

+/**
+ * intel_idle_freeze - simplified "enter" callback routine for suspend-to-idle
+ * @dev: cpuidle_device
+ * @drv: cpuidle driver
+ * @index: state index
+ */
+static void intel_idle_freeze(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ unsigned long ecx = 1; /* break on interrupt flag */
+ unsigned long eax = flg2MWAIT(drv->states[index].flags);
+
+ mwait_idle_with_hints(eax, ecx);
+}
+
static void __setup_broadcast_timer(void *arg)
{
unsigned long reason = (unsigned long)arg;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Next message: Serge E. Hallyn: "Re: [PATCHv3 8/8] cgroup: Add documentation for cgroup namespaces"
Previous message: Rafael J. Wysocki: "[PATCH 4/6] PM / sleep: Make it possible to quiesce timers during suspend-to-idle"
In reply to: Rafael J. Wysocki: "[Update][PATCH 4/6 v2] PM / sleep: Make it possible to quiesce timers during suspend-to-idle"
Next in thread: Peter Zijlstra: "Re: [PATCH 5/6] intel_idle: Add ->enter_freeze callbacks"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]