summaryrefslogtreecommitdiff
path: root/include/trace/events/context_tracking.h
blob: ce8007cf29cf41a104b1864152502178536264c4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
#undef TRACE_SYSTEM
#define TRACE_SYSTEM context_tracking

#if !defined(_TRACE_CONTEXT_TRACKING_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_CONTEXT_TRACKING_H

#include <linux/tracepoint.h>

DECLARE_EVENT_CLASS(context_tracking_user,

	TP_PROTO(int dummy),

	TP_ARGS(dummy),

	TP_STRUCT__entry(
		__field( int,	dummy	)
	),

	TP_fast_assign(
		__entry->dummy		= dummy;
	),

	TP_printk("%s", "")
);

/**
 * user_enter - called when the kernel resumes to userspace
 * @dummy:	dummy arg to make trace event macro happy
 *
 * This event occurs when the kernel resumes to userspace  after
 * an exception or a syscall.
 */
DEFINE_EVENT(context_tracking_user, user_enter,

	TP_PROTO(int dummy),

	TP_ARGS(dummy)
);

/**
 * user_exit - called when userspace enters the kernel
 * @dummy:	dummy arg to make trace event macro happy
 *
 * This event occurs when userspace enters the kernel through
 * an exception or a syscall.
 */
DEFINE_EVENT(context_tracking_user, user_exit,

	TP_PROTO(int dummy),

	TP_ARGS(dummy)
);


#endif /*  _TRACE_CONTEXT_TRACKING_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/dt-bindings/gpio/meson8-gpio.h')