| /kernel/linux/linux-5.10/arch/x86/kernel/ |
| D | nmi.c | 18 #include <linux/nmi.h>
31 #include <asm/nmi.h>
39 #include <trace/events/nmi.h>
80 * Prevent NMI reason port (0x61) being accessed simultaneously, can
81 * only be used in NMI handler.
117 "INFO: NMI handler (%ps) took too long to run: %lld.%03d msecs\n", in nmi_check_duration()
150 /* return total number of NMI events handled */ in nmi_handle()
167 * internal NMI handler call chains (SERR and IO_CHECK). in __register_nmi_handler()
196 * the name passed in to describe the nmi handler in unregister_nmi_handler()
201 "Trying to free NMI (%s) from NMI context!\n", n->name); in unregister_nmi_handler()
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| /kernel/linux/linux-6.6/arch/x86/kernel/ |
| D | nmi.c | 18 #include <linux/nmi.h>
31 #include <asm/nmi.h>
40 #include <trace/events/nmi.h>
43 * An emergency handler can be set in any context including NMI
94 * Prevent NMI reason port (0x61) being accessed simultaneously, can
95 * only be used in NMI handler.
131 "INFO: NMI handler (%ps) took too long to run: %lld.%03d msecs\n", in nmi_check_duration()
177 /* return total number of NMI events handled */ in nmi_handle()
194 * internal NMI handler call chains (SERR and IO_CHECK). in __register_nmi_handler()
223 * the name passed in to describe the nmi handler in unregister_nmi_handler()
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| /kernel/linux/linux-6.6/arch/x86/platform/uv/ |
| D | uv_nmi.c | 3 * SGI NMI support routines
16 #include <linux/nmi.h>
26 #include <asm/nmi.h>
34 * UV handler for NMI
36 * Handle system-wide NMI events generated by the global 'power nmi' command.
38 * Basic operation is to field the NMI interrupt on each CPU and wait
39 * until all CPU's have arrived into the nmi handler. If some CPU's do not
40 * make it into the handler, try and force them in with the IPI(NMI) signal.
46 * To do this we register our primary NMI notifier on the NMI_UNKNOWN
47 * chain. This reduces the number of false NMI calls when the perf
[all …]
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| /kernel/linux/linux-5.10/Documentation/RCU/ |
| D | NMI-RCU.rst | 3 Using RCU to Protect Dynamic NMI Handlers
10 how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer
22 The dummy_nmi_callback() function is a "dummy" NMI handler that does
24 the NMI handler to take the default machine-specific action::
29 NMI handler::
46 The do_nmi() function processes each NMI. It first disables preemption
48 count of NMIs. It then invokes the NMI handler stored in the nmi_callback
50 default_do_nmi() function to handle a machine-specific NMI. Finally,
64 Back to the discussion of NMI and RCU::
71 The set_nmi_callback() function registers an NMI handler. Note that any
[all …]
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| /kernel/linux/linux-6.6/Documentation/RCU/ |
| D | NMI-RCU.rst | 3 Using RCU to Protect Dynamic NMI Handlers
10 how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer
21 The dummy_nmi_callback() function is a "dummy" NMI handler that does
23 the NMI handler to take the default machine-specific action::
28 NMI handler::
45 The do_nmi() function processes each NMI. It first disables preemption
47 count of NMIs. It then invokes the NMI handler stored in the nmi_callback
49 default_do_nmi() function to handle a machine-specific NMI. Finally,
63 Back to the discussion of NMI and RCU::
70 The set_nmi_callback() function registers an NMI handler. Note that any
[all …]
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| /kernel/linux/linux-5.10/arch/x86/platform/uv/ |
| D | uv_nmi.c | 3 * SGI NMI support routines
16 #include <linux/nmi.h>
26 #include <asm/nmi.h>
33 * UV handler for NMI
35 * Handle system-wide NMI events generated by the global 'power nmi' command.
37 * Basic operation is to field the NMI interrupt on each CPU and wait
38 * until all CPU's have arrived into the nmi handler. If some CPU's do not
39 * make it into the handler, try and force them in with the IPI(NMI) signal.
45 * To do this we register our primary NMI notifier on the NMI_UNKNOWN
46 * chain. This reduces the number of false NMI calls when the perf
[all …]
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/interrupt-controller/ |
| D | allwinner,sun7i-a20-sc-nmi.yaml | 4 $id: http://devicetree.org/schemas/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml#
25 - const: allwinner,sun6i-a31-sc-nmi
27 - const: allwinner,sun7i-a20-sc-nmi
29 - const: allwinner,sun8i-v3s-nmi
30 - const: allwinner,sun9i-a80-nmi
31 - const: allwinner,sun9i-a80-nmi
33 - const: allwinner,sun50i-a100-nmi
34 - const: allwinner,sun9i-a80-nmi
56 compatible = "allwinner,sun7i-a20-sc-nmi";
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| /kernel/linux/linux-6.6/arch/sparc/kernel/ |
| D | nmi.c | 2 /* Pseudo NMI support on sparc64 systems.
6 * The NMI watchdog support and infrastructure is based almost
7 * entirely upon the x86 NMI support code.
13 #include <linux/nmi.h>
29 /* We don't have a real NMI on sparc64, but we can fake one
40 * >0: the NMI watchdog is active, but can be disabled
41 * <0: the NMI watchdog has not been set up, and cannot be enabled
42 * 0: the NMI watchdog is disabled, but can be enabled
100 if (notify_die(DIE_NMI, "nmi", regs, 0, in perfctr_irq()
114 die_nmi("BUG: NMI Watchdog detected LOCKUP", in perfctr_irq()
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| /kernel/linux/linux-5.10/arch/sparc/kernel/ |
| D | nmi.c | 2 /* Pseudo NMI support on sparc64 systems.
6 * The NMI watchdog support and infrastructure is based almost
7 * entirely upon the x86 NMI support code.
13 #include <linux/nmi.h>
29 /* We don't have a real NMI on sparc64, but we can fake one
40 * >0: the NMI watchdog is active, but can be disabled
41 * <0: the NMI watchdog has not been set up, and cannot be enabled
42 * 0: the NMI watchdog is disabled, but can be enabled
95 if (notify_die(DIE_NMI, "nmi", regs, 0, in perfctr_irq()
109 die_nmi("BUG: NMI Watchdog detected LOCKUP", in perfctr_irq()
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| /kernel/linux/linux-6.6/arch/x86/lib/ |
| D | usercopy.c | 14 * copy_from_user_nmi - NMI safe copy from user
22 * from NMI context. Despite the name it is not restricted to be called
23 * from NMI context. It is safe to be called from any other context as
27 * For NMI context invocations this relies on the nested NMI work to allow
28 * atomic faults from the NMI path; the nested NMI paths are careful to
43 * Even though this function is typically called from NMI/IRQ context in copy_from_user_nmi()
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| /kernel/linux/linux-6.6/lib/ |
| D | nmi_backtrace.c | 3 * NMI backtrace support
8 * HW NMI watchdog support
12 * Arch specific calls to support NMI watchdog
14 * Bits copied from original nmi.c file
19 #include <linux/nmi.h>
56 * Don't try to send an NMI to this cpu; it may work on some in nmi_trigger_cpumask_backtrace()
65 pr_info("Sending NMI from CPU %d to CPUs %*pbl:\n", in nmi_trigger_cpumask_backtrace()
101 * Allow nested NMI backtraces while serializing in nmi_cpu_backtrace()
106 pr_warn("NMI backtrace for cpu %d skipped: idling at %pS\n", in nmi_cpu_backtrace()
109 pr_warn("NMI backtrace for cpu %d\n", cpu); in nmi_cpu_backtrace()
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| /kernel/linux/linux-6.6/arch/x86/entry/ |
| D | entry_64.S | 984 * only on return from non-NMI IST interrupts that came
1150 * the iretq it performs will take us out of NMI context.
1152 * NMI is using the top of the stack of the previous NMI. We
1153 * can't let it execute because the nested NMI will corrupt the
1154 * stack of the previous NMI. NMI handlers are not re-entrant
1161 * is an NMI stack.
1162 * If the variable is not set and the stack is not the NMI
1168 * o Continue processing the NMI
1169 * If the variable is set or the previous stack is the NMI stack:
1171 * o return back to the first NMI
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| /kernel/linux/linux-5.10/arch/x86/entry/ |
| D | entry_64.S | 977 * only on return from non-NMI IST interrupts that came
1145 * the iretq it performs will take us out of NMI context.
1147 * NMI is using the top of the stack of the previous NMI. We
1148 * can't let it execute because the nested NMI will corrupt the
1149 * stack of the previous NMI. NMI handlers are not re-entrant
1156 * is an NMI stack.
1157 * If the variable is not set and the stack is not the NMI
1163 * o Continue processing the NMI
1164 * If the variable is set or the previous stack is the NMI stack:
1166 * o return back to the first NMI
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| /kernel/linux/linux-6.6/Documentation/watchdog/ |
| D | hpwdt.rst | 2 HPE iLO NMI Watchdog Driver
11 The HPE iLO NMI Watchdog driver is a kernel module that provides basic
12 watchdog functionality and handler for the iLO "Generate NMI to System"
34 NMI is delivered to the system. Setting the value to
35 zero disables the pretimeout NMI.
42 kdumptimeout Minimum timeout in seconds to apply upon receipt of an NMI
53 Due to limitations in the iLO hardware, the NMI pretimeout if enabled,
58 Upon receipt of an NMI from the iLO, the hpwdt driver will initiate a
70 If the hpwdt does not receive the NMI associated with an expiring timer,
76 The HPE iLO NMI Watchdog Driver and documentation were originally developed
|
| /kernel/linux/linux-5.10/Documentation/watchdog/ |
| D | hpwdt.rst | 2 HPE iLO NMI Watchdog Driver
11 The HPE iLO NMI Watchdog driver is a kernel module that provides basic
12 watchdog functionality and handler for the iLO "Generate NMI to System"
34 NMI is delivered to the system. Setting the value to
35 zero disables the pretimeout NMI.
42 kdumptimeout Minimum timeout in seconds to apply upon receipt of an NMI
53 Due to limitations in the iLO hardware, the NMI pretimeout if enabled,
58 Upon receipt of an NMI from the iLO, the hpwdt driver will initiate a
70 If the hpwdt does not receive the NMI associated with an expiring timer,
76 The HPE iLO NMI Watchdog Driver and documentation were originally developed
|
| /kernel/linux/linux-5.10/lib/ |
| D | nmi_backtrace.c | 3 * NMI backtrace support
8 * HW NMI watchdog support
12 * Arch specific calls to support NMI watchdog
14 * Bits copied from original nmi.c file
19 #include <linux/nmi.h>
56 * Don't try to send an NMI to this cpu; it may work on some in nmi_trigger_cpumask_backtrace()
65 pr_info("Sending NMI from CPU %d to CPUs %*pbl:\n", in nmi_trigger_cpumask_backtrace()
98 pr_warn("NMI backtrace for cpu %d skipped: idling at %pS\n", in nmi_cpu_backtrace()
101 pr_warn("NMI backtrace for cpu %d\n", cpu); in nmi_cpu_backtrace()
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| /kernel/linux/linux-6.6/kernel/ |
| D | watchdog_perf.c | 9 * Some chunks also taken from the old x86-specific nmi watchdog code, thanks
13 #define pr_fmt(fmt) "NMI watchdog: " fmt
15 #include <linux/nmi.h>
39 * So it runs effectively with 2.5 times the rate of the NMI in watchdog_update_hrtimer_threshold()
41 * the NMI watchdog expires. The NMI watchdog on x86 is based on in watchdog_update_hrtimer_threshold()
43 * might run way faster than expected and the NMI fires in a in watchdog_update_hrtimer_threshold()
46 * enough to get the NMI period smaller than the hrtimer watchdog in watchdog_update_hrtimer_threshold()
49 * The sample threshold is used to check in the NMI handler whether in watchdog_update_hrtimer_threshold()
50 * the minimum time between two NMI samples has elapsed. That in watchdog_update_hrtimer_threshold()
248 * watchdog_hardlockup_probe - Probe whether NMI event is available at all
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/interrupt-controller/ |
| D | allwinner,sun7i-a20-sc-nmi.yaml | 4 $id: http://devicetree.org/schemas/interrupt-controller/allwinner,sun7i-a20-sc-nmi.yaml#
26 - const: allwinner,sun6i-a31-sc-nmi
28 - const: allwinner,sun7i-a20-sc-nmi
32 - const: allwinner,sun9i-a80-nmi
37 - const: allwinner,sun50i-a100-nmi
38 - const: allwinner,sun9i-a80-nmi
63 compatible = "allwinner,sun7i-a20-sc-nmi";
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| /kernel/linux/linux-5.10/kernel/printk/ |
| D | printk_safe.c | 19 * printk() could not take logbuf_lock in NMI context. Instead,
62 * Add a message to per-CPU context-dependent buffer. NMI and printk-safe
64 * NMI-printk would have overwritten the NMI messages.
117 * in NMI or printk_safe context (when in panic). The messages in printk_safe_flush_line()
239 * printk_safe_flush - flush all per-cpu nmi buffers.
258 * printk_safe_flush_on_panic - flush all per-cpu nmi buffers when the system
261 * Similar to printk_safe_flush() but it can be called even in NMI context when
262 * the system goes down. It does the best effort to get NMI messages into
294 * Safe printk() for NMI context. It uses a per-CPU buffer to
317 * Marks a code that might produce many messages in NMI context
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| /kernel/linux/linux-5.10/kernel/ |
| D | watchdog_hld.c | 9 * Some chunks also taken from the old x86-specific nmi watchdog code, thanks
13 #define pr_fmt(fmt) "NMI watchdog: " fmt
15 #include <linux/nmi.h>
55 * So it runs effectively with 2.5 times the rate of the NMI in watchdog_update_hrtimer_threshold()
57 * the NMI watchdog expires. The NMI watchdog on x86 is based on in watchdog_update_hrtimer_threshold()
59 * might run way faster than expected and the NMI fires in a in watchdog_update_hrtimer_threshold()
62 * enough to get the NMI period smaller than the hrtimer watchdog in watchdog_update_hrtimer_threshold()
65 * The sample threshold is used to check in the NMI handler whether in watchdog_update_hrtimer_threshold()
66 * the minimum time between two NMI samples has elapsed. That in watchdog_update_hrtimer_threshold()
283 * hardlockup_detector_perf_init - Probe whether NMI event is available at all
[all …]
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| /kernel/linux/linux-6.6/include/xen/interface/ |
| D | nmi.h | 3 * nmi.h
5 * NMI callback registration and reason codes.
16 * NMI reason codes:
25 /* Unknown hardware-generated NMI. */
35 * Register NMI callback for this (calling) VCPU. Currently this only makes
47 * Deregister NMI callback for this (calling) VCPU.
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| /kernel/linux/linux-5.10/include/xen/interface/ |
| D | nmi.h | 3 * nmi.h
5 * NMI callback registration and reason codes.
16 * NMI reason codes:
25 /* Unknown hardware-generated NMI. */
35 * Register NMI callback for this (calling) VCPU. Currently this only makes
47 * Deregister NMI callback for this (calling) VCPU.
|
| /kernel/linux/linux-6.6/arch/powerpc/kernel/ |
| D | watchdog.c | 7 * This uses code from arch/sparc/kernel/nmi.c and kernel/watchdog.c
17 #include <linux/nmi.h>
32 #include <asm/nmi.h>
41 * The local soft-NMI, and the SMP checker.
43 * The soft-NMI checker can detect lockups on the local CPU. When interrupts
47 * watchdog's soft_nmi_interrupt(), which appears to Linux as an NMI
50 * The soft-NMI checker will compare the heartbeat timestamp for this CPU
54 * The limitation of the soft-NMI watchdog is that it does not work when
70 * Some platforms implement true NMI IPIs, which can be used by the SMP
72 * state with the NMI IPI, to get crash/debug data from it. This way the
[all …]
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| /kernel/linux/linux-5.10/arch/x86/kernel/apic/ |
| D | hw_nmi.c | 3 * HW NMI watchdog support
7 * Arch specific calls to support NMI watchdog
9 * Bits copied from original nmi.c file
14 #include <asm/nmi.h>
20 #include <linux/nmi.h>
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| /kernel/linux/linux-6.6/arch/x86/kernel/apic/ |
| D | hw_nmi.c | 3 * HW NMI watchdog support
7 * Arch specific calls to support NMI watchdog
9 * Bits copied from original nmi.c file
14 #include <asm/nmi.h>
20 #include <linux/nmi.h>
|