/*
* 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));
}
