56c0b48b1e
Using irq_work for processing OPAL event interrupts is not necessary. irq_work is typically used to schedule work from NMI context, a softirq may be more appropriate. However OPAL events are not particularly performance or latency critical, so they can all be invoked by kopald. This patch removes the irq_work queueing, and instead wakes up kopald when there is an event to be processed. kopald processes interrupts individually, enabling irqs and calling cond_resched between each one to minimise latencies. Event handlers themselves should still use threaded handlers, workqueues, etc. as necessary to avoid high interrupts-off latencies within any single interrupt. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
34 lines
747 B
C
34 lines
747 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _POWERNV_H
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#define _POWERNV_H
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#ifdef CONFIG_SMP
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extern void pnv_smp_init(void);
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#else
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static inline void pnv_smp_init(void) { }
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#endif
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extern void pnv_platform_error_reboot(struct pt_regs *regs, const char *msg) __noreturn;
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struct pci_dev;
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#ifdef CONFIG_PCI
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extern void pnv_pci_init(void);
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extern void pnv_pci_shutdown(void);
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#else
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static inline void pnv_pci_init(void) { }
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static inline void pnv_pci_shutdown(void) { }
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#endif
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extern u32 pnv_get_supported_cpuidle_states(void);
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extern void pnv_lpc_init(void);
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extern void opal_handle_events(void);
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extern bool opal_have_pending_events(void);
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extern void opal_event_shutdown(void);
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bool cpu_core_split_required(void);
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#endif /* _POWERNV_H */
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