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authorThomas Gleixner <tglx@linutronix.de>2019-02-23 12:53:31 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-02-23 12:53:31 +0300
commita324ca9cad4736252c33c1e28cffe1d87f262d03 (patch)
treeda64e14dd8432602634773b52073928c50dfb85c /kernel/irq/irqdesc.c
parent4e6b26d23dc1faee318796d5c7f91b5692b1e6be (diff)
parent28528fca4908142bd1a3247956cba56c9c667d71 (diff)
downloadlinux-a324ca9cad4736252c33c1e28cffe1d87f262d03.tar.xz
Merge tag 'irqchip-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core
Pull irqchip updates from Marc Zyngier - Core pseudo-NMI handling code - Allow the default irq domain to be retrieved - A new interrupt controller for the Loongson LS1X platform - Affinity support for the SiFive PLIC - Better support for the iMX irqsteer driver - NUMA aware memory allocations for GICv3 - A handful of other fixes (i8259, GICv3, PLIC)
Diffstat (limited to 'kernel/irq/irqdesc.c')
-rw-r--r--kernel/irq/irqdesc.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 84fa255d0329..13539e12cd80 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -670,6 +670,41 @@ int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq,
set_irq_regs(old_regs);
return ret;
}
+
+#ifdef CONFIG_IRQ_DOMAIN
+/**
+ * handle_domain_nmi - Invoke the handler for a HW irq belonging to a domain
+ * @domain: The domain where to perform the lookup
+ * @hwirq: The HW irq number to convert to a logical one
+ * @regs: Register file coming from the low-level handling code
+ *
+ * Returns: 0 on success, or -EINVAL if conversion has failed
+ */
+int handle_domain_nmi(struct irq_domain *domain, unsigned int hwirq,
+ struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ unsigned int irq;
+ int ret = 0;
+
+ nmi_enter();
+
+ irq = irq_find_mapping(domain, hwirq);
+
+ /*
+ * ack_bad_irq is not NMI-safe, just report
+ * an invalid interrupt.
+ */
+ if (likely(irq))
+ generic_handle_irq(irq);
+ else
+ ret = -EINVAL;
+
+ nmi_exit();
+ set_irq_regs(old_regs);
+ return ret;
+}
+#endif
#endif
/* Dynamic interrupt handling */