riscv: Support irq_work via self IPIs (29844792) · Commits · 戴 / test

arch/riscv/include/asm/irq_work.h

0 → 100644

+10 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		#ifndef _ASM_RISCV_IRQ_WORK_H
		#define _ASM_RISCV_IRQ_WORK_H

		static inline bool arch_irq_work_has_interrupt(void)
		{
		return true;
		}
		extern void arch_irq_work_raise(void);
		#endif /* _ASM_RISCV_IRQ_WORK_H */

+15 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@
		#include <linux/sched.h>
		#include <linux/seq_file.h>
		#include <linux/delay.h>
		#include <linux/irq_work.h>

		#include <asm/clint.h>
		#include <asm/sbi.h>
		@@ -26,6 +27,7 @@ enum ipi_message_type {
		IPI_RESCHEDULE,
		IPI_CALL_FUNC,
		IPI_CPU_STOP,
		IPI_IRQ_WORK,
		IPI_MAX
		};

		@@ -123,6 +125,13 @@ static inline void clear_ipi(void)
		clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id()));
		}

		#ifdef CONFIG_IRQ_WORK
		void arch_irq_work_raise(void)
		{
		send_ipi_single(smp_processor_id(), IPI_IRQ_WORK);
		}
		#endif

		void handle_IPI(struct pt_regs *regs)
		{
		struct pt_regs *old_regs = set_irq_regs(regs);
		@@ -158,6 +167,11 @@ void handle_IPI(struct pt_regs *regs)
		ipi_stop();
		}

		if (ops & (1 << IPI_IRQ_WORK)) {
		stats[IPI_IRQ_WORK]++;
		irq_work_run();
		}

		BUG_ON((ops >> IPI_MAX) != 0);

		/* Order data access and bit testing. */
		@@ -173,6 +187,7 @@ static const char * const ipi_names[] = {
		[IPI_RESCHEDULE] = "Rescheduling interrupts",
		[IPI_CALL_FUNC] = "Function call interrupts",
		[IPI_CPU_STOP] = "CPU stop interrupts",
		[IPI_IRQ_WORK] = "IRQ work interrupts",
		};

		void show_ipi_stats(struct seq_file *p, int prec)