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From: guoren@kernel.org
To: guoren@kernel.org, arnd@arndb.de
Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org,
	linux-arch@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH 11/13] csky: Add irq_work support
Date: Sat,  1 Aug 2020 01:14:11 +0000
Message-ID: <1596244453-98575-12-git-send-email-guoren@kernel.org> (raw)
In-Reply-To: <1596244453-98575-1-git-send-email-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Running work in hardware interrupt context for csky. Implement:
 - arch_irq_work_raise()
 - arch_irq_work_has_interrupt()

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
---
 arch/csky/include/asm/irq_work.h | 11 +++++++++++
 arch/csky/kernel/smp.c           | 12 ++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 arch/csky/include/asm/irq_work.h

diff --git a/arch/csky/include/asm/irq_work.h b/arch/csky/include/asm/irq_work.h
new file mode 100644
index 00000000..33aaf39
--- /dev/null
+++ b/arch/csky/include/asm/irq_work.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_IRQ_WORK_H
+#define __ASM_CSKY_IRQ_WORK_H
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+	return true;
+}
+extern void arch_irq_work_raise(void);
+#endif /* __ASM_CSKY_IRQ_WORK_H */
diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c
index 1945fb2..60f2ab1 100644
--- a/arch/csky/kernel/smp.c
+++ b/arch/csky/kernel/smp.c
@@ -12,6 +12,7 @@
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/irq.h>
+#include <linux/irq_work.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
 #include <linux/sched/task_stack.h>
@@ -35,6 +36,7 @@ enum ipi_message_type {
 	IPI_EMPTY,
 	IPI_RESCHEDULE,
 	IPI_CALL_FUNC,
+	IPI_IRQ_WORK,
 	IPI_MAX
 };
 
@@ -53,6 +55,9 @@ static irqreturn_t handle_ipi(int irq, void *dev)
 		if (ops & (1 << IPI_CALL_FUNC))
 			generic_smp_call_function_interrupt();
 
+		if (ops & (1 << IPI_IRQ_WORK))
+			irq_work_run();
+
 		BUG_ON((ops >> IPI_MAX) != 0);
 	}
 
@@ -108,6 +113,13 @@ void smp_send_reschedule(int cpu)
 	send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
 }
 
+#ifdef CONFIG_IRQ_WORK
+void arch_irq_work_raise(void)
+{
+	send_ipi_message(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);
+}
+#endif
+
 void __init smp_prepare_boot_cpu(void)
 {
 }
-- 
2.7.4


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-01  1:14 [PATCH 00/13] Update csky subsystem for linux-5.9-rc1 guoren
2020-08-01  1:14 ` [PATCH 01/13] csky: remove unusued thread_saved_pc and *_segments functions/macros guoren
2020-08-01  1:14 ` [PATCH 02/13] csky: Add SECCOMP_FILTER supported guoren
2020-08-01  1:14 ` [PATCH 03/13] csky: Add cpu feature register hint for smp guoren
2020-08-01  1:14 ` [PATCH 04/13] csky: Fixup duplicated restore sp in RESTORE_REGS_FTRACE guoren
2020-08-01  1:14 ` [PATCH 05/13] csky: Fixup kprobes handler couldn't change pc guoren
2020-08-01  1:14 ` [PATCH 06/13] csky: Add support for function error injection guoren
2020-08-01  1:14 ` [PATCH 07/13] csky: Optimize the trap processing flow guoren
2020-08-01  1:14 ` [PATCH 08/13] csky: Use top-down mmap layout guoren
2020-08-01  1:14 ` [PATCH 09/13] csky: Set CONFIG_NR_CPU 4 as default guoren
2020-08-01  1:14 ` [PATCH 10/13] csky: Fixup warning by EXPORT_SYMBOL(kmap) guoren
2020-08-01  1:14 ` guoren [this message]
2020-08-01  1:14 ` [PATCH 12/13] csky: Add arch_show_interrupts for IPI interrupts guoren
2020-08-01  1:14 ` [PATCH 13/13] csky: Add context tracking support guoren

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