mirror of
https://github.com/torvalds/linux.git
synced 2025-11-06 03:29:11 +02:00
1687d8aca5
coalescing lots of silly duplicates.
* Use static_calls() instead of indirect calls for apic->foo()
* Tons of cleanups an crap removal along the way
-----BEGIN PGP SIGNATURE-----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=eoKm
-----END PGP SIGNATURE-----
Merge tag 'x86_apic_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 apic updates from Dave Hansen:
"This includes a very thorough rework of the 'struct apic' handlers.
Quite a variety of them popped up over the years, especially in the
32-bit days when odd apics were much more in vogue.
The end result speaks for itself, which is a removal of a ton of code
and static calls to replace indirect calls.
If there's any breakage here, it's likely to be around the 32-bit
museum pieces that get light to no testing these days.
Summary:
- Rework apic callbacks, getting rid of unnecessary ones and
coalescing lots of silly duplicates.
- Use static_calls() instead of indirect calls for apic->foo()
- Tons of cleanups an crap removal along the way"
* tag 'x86_apic_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
x86/apic: Turn on static calls
x86/apic: Provide static call infrastructure for APIC callbacks
x86/apic: Wrap IPI calls into helper functions
x86/apic: Mark all hotpath APIC callback wrappers __always_inline
x86/xen/apic: Mark apic __ro_after_init
x86/apic: Convert other overrides to apic_update_callback()
x86/apic: Replace acpi_wake_cpu_handler_update() and apic_set_eoi_cb()
x86/apic: Provide apic_update_callback()
x86/xen/apic: Use standard apic driver mechanism for Xen PV
x86/apic: Provide common init infrastructure
x86/apic: Wrap apic->native_eoi() into a helper
x86/apic: Nuke ack_APIC_irq()
x86/apic: Remove pointless arguments from [native_]eoi_write()
x86/apic/noop: Tidy up the code
x86/apic: Remove pointless NULL initializations
x86/apic: Sanitize APIC ID range validation
x86/apic: Prepare x2APIC for using apic::max_apic_id
x86/apic: Simplify X2APIC ID validation
x86/apic: Add max_apic_id member
x86/apic: Wrap APIC ID validation into an inline
...
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* HW NMI watchdog support
|
|
*
|
|
* started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.
|
|
*
|
|
* Arch specific calls to support NMI watchdog
|
|
*
|
|
* Bits copied from original nmi.c file
|
|
*
|
|
*/
|
|
#include <linux/thread_info.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/nmi.h>
|
|
|
|
#include <linux/cpumask.h>
|
|
#include <linux/kdebug.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/kprobes.h>
|
|
#include <linux/nmi.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "local.h"
|
|
|
|
#ifdef CONFIG_HARDLOCKUP_DETECTOR_PERF
|
|
u64 hw_nmi_get_sample_period(int watchdog_thresh)
|
|
{
|
|
return (u64)(cpu_khz) * 1000 * watchdog_thresh;
|
|
}
|
|
#endif
|
|
|
|
#ifdef arch_trigger_cpumask_backtrace
|
|
static void nmi_raise_cpu_backtrace(cpumask_t *mask)
|
|
{
|
|
__apic_send_IPI_mask(mask, NMI_VECTOR);
|
|
}
|
|
|
|
void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
|
|
{
|
|
nmi_trigger_cpumask_backtrace(mask, exclude_cpu,
|
|
nmi_raise_cpu_backtrace);
|
|
}
|
|
|
|
static int nmi_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs)
|
|
{
|
|
if (nmi_cpu_backtrace(regs))
|
|
return NMI_HANDLED;
|
|
|
|
return NMI_DONE;
|
|
}
|
|
NOKPROBE_SYMBOL(nmi_cpu_backtrace_handler);
|
|
|
|
static int __init register_nmi_cpu_backtrace_handler(void)
|
|
{
|
|
register_nmi_handler(NMI_LOCAL, nmi_cpu_backtrace_handler,
|
|
0, "arch_bt");
|
|
return 0;
|
|
}
|
|
early_initcall(register_nmi_cpu_backtrace_handler);
|
|
#endif
|