These are very similar to the XICS handlers in a simpler form. They
make use of the ICSIRQState array of the XICS interrupt source to
differentiate the MSI from the LSI interrupts. The spapr_xive_irq()
routine in charge of triggering the CPU interrupt line will be filled
later on.
The next patch will introduce the MMIO handlers to interact with XIVE
interrupt sources.
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
hw/intc/spapr_xive.c | 46 +++++++++++++++++++++++++++++++++++++++++++++
include/hw/ppc/spapr_xive.h | 1 +
2 files changed, 47 insertions(+)
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index 52c32f588d6d..1ed7b6a286e9 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -27,6 +27,50 @@
#include "xive-internal.h"
+static void spapr_xive_irq(sPAPRXive *xive, int srcno)
+{
+
+}
+
+/*
+ * XIVE Interrupt Source
+ */
+static void spapr_xive_source_set_irq_msi(sPAPRXive *xive, int srcno, int val)
+{
+ if (val) {
+ spapr_xive_irq(xive, srcno);
+ }
+}
+
+static void spapr_xive_source_set_irq_lsi(sPAPRXive *xive, int srcno, int val)
+{
+ ICSIRQState *irq = &xive->ics->irqs[srcno];
+
+ if (val) {
+ irq->status |= XICS_STATUS_ASSERTED;
+ } else {
+ irq->status &= ~XICS_STATUS_ASSERTED;
+ }
+
+ if (irq->status & XICS_STATUS_ASSERTED
+ && !(irq->status & XICS_STATUS_SENT)) {
+ irq->status |= XICS_STATUS_SENT;
+ spapr_xive_irq(xive, srcno);
+ }
+}
+
+static void spapr_xive_source_set_irq(void *opaque, int srcno, int val)
+{
+ sPAPRXive *xive = SPAPR_XIVE(opaque);
+ ICSIRQState *irq = &xive->ics->irqs[srcno];
+
+ if (irq->flags & XICS_FLAGS_IRQ_LSI) {
+ spapr_xive_source_set_irq_lsi(xive, srcno, val);
+ } else {
+ spapr_xive_source_set_irq_msi(xive, srcno, val);
+ }
+}
+
/*
* Main XIVE object
*/
@@ -80,6 +124,8 @@ static void spapr_xive_realize(DeviceState *dev, Error
**errp)
}
xive->ics = ICS_BASE(obj);
+ xive->qirqs = qemu_allocate_irqs(spapr_xive_source_set_irq, xive,
+ xive->nr_irqs);
/* Allocate the last IRQ numbers for the IPIs */
for (i = xive->nr_irqs - xive->nr_targets; i < xive->nr_irqs; i++) {
diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
index 29112589b37f..eab92c4c1bb8 100644
--- a/include/hw/ppc/spapr_xive.h
+++ b/include/hw/ppc/spapr_xive.h
@@ -38,6 +38,7 @@ struct sPAPRXive {
/* IRQ */
ICSState *ics; /* XICS source inherited from the SPAPR machine */
+ qemu_irq *qirqs;
/* XIVE internal tables */
uint8_t *sbe;
--
2.13.5
