/* * Parse an interrupt source override for an ISA interrupt. */ static void madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) { enum intr_trigger trig; enum intr_polarity pol; if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && intr->GlobalIrq == 2) { if (bootverbose) printf("MADT: Skipping timer override\n"); return; } madt_parse_interrupt_values(intr, &trig, &pol); /* Remap the IRQ if it is mapped to a different interrupt vector. */ if (intr->SourceIrq != intr->GlobalIrq && intr->GlobalIrq > 15 && intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) /* * If the SCI is remapped to a non-ISA global interrupt, * then override the vector we use to setup. */ acpi_OverrideInterruptLevel(intr->GlobalIrq); /* Register the IRQ with the polarity and trigger mode found. */ xen_register_pirq(intr->GlobalIrq, trig, pol); }
static int xen_register_gsi(u32 gsi, int gsi_override, int triggering, int polarity) { int rc, irq; struct physdev_setup_gsi setup_gsi; if (!xen_pv_domain()) return -1; printk(KERN_DEBUG "xen: registering gsi %u triggering %d polarity %d\n", gsi, triggering, polarity); irq = xen_register_pirq(gsi, gsi_override, triggering, true); setup_gsi.gsi = gsi; setup_gsi.triggering = (triggering == ACPI_EDGE_SENSITIVE ? 0 : 1); setup_gsi.polarity = (polarity == ACPI_ACTIVE_HIGH ? 0 : 1); rc = HYPERVISOR_physdev_op(PHYSDEVOP_setup_gsi, &setup_gsi); if (rc == -EEXIST) printk(KERN_INFO "Already setup the GSI :%d\n", gsi); else if (rc) { printk(KERN_ERR "Failed to setup GSI :%d, err_code:%d\n", gsi, rc); } return irq; }
static int acpi_register_gsi_xen_hvm(struct device *dev, u32 gsi, int trigger, int polarity) { if (!xen_hvm_domain()) return -1; return xen_register_pirq(gsi, -1 /* no GSI override */, trigger, false /* no mapping of GSI to PIRQ */); }
/* * Parse an interrupt source override for an ISA interrupt. */ static void madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) { enum intr_trigger trig; enum intr_polarity pol; if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && intr->GlobalIrq == 2) { if (bootverbose) printf("MADT: Skipping timer override\n"); return; } madt_parse_interrupt_values(intr, &trig, &pol); /* Register the IRQ with the polarity and trigger mode found. */ xen_register_pirq(intr->GlobalIrq, trig, pol); }
static int nexus_xen_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) { int ret; /* * ISA and PCI intline IRQs are not preregistered on Xen, so * intercept calls to configure those and register them on the fly. */ if ((irq < first_msi_irq) && (intr_lookup_source(irq) == NULL)) { ret = xen_register_pirq(irq, trig, pol); if (ret != 0) return (ret); nexus_add_irq(irq); } return (intr_config_intr(irq, trig, pol)); }