[Qemu-devel] [PATCH] sPAPR: implement route_intx_to_irq to get gsi of pci device.

[Liu Ping Fan <qemulist@gmail.com>]

This is useful when pci assignment happens on sPAPR.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
---
This patch will apply on patches which enable xics in kernel.
---
 hw/intc/xics.c        |  5 +++++
 hw/ppc/spapr_pci.c    | 14 ++++++++++++++
 include/hw/ppc/xics.h |  1 +
 3 files changed, 20 insertions(+)

diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index bb018d1..02cdab8 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -442,6 +442,11 @@ void xics_set_irq_type(XICSState *icp, int irq, bool lsi)
     icp->ics->islsi[irq - icp->ics->offset] = lsi;
 }
 
+int xics_get_irq_offset(XICSState *icp)
+{
+    return icp->ics->offset;
+}
+
 /*
  * Guest interfaces
  */
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 9b6ee32..6d3657a 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -432,6 +432,19 @@ static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
     qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
 }
 
+static PCIINTxRoute spapr_phb_route_intx_to_irq(void *opaque, int pirq_pin)
+{
+    int gsi;
+    PCIINTxRoute route;
+    sPAPRPHBState *phb = opaque;
+
+    gsi = phb->lsi_table[pirq_pin].irq;
+    gsi += xics_get_irq_offset(spapr->icp);
+    route.mode = PCI_INTX_ENABLED;
+    route.irq = gsi;
+    return route;
+}
+
 /*
  * MSI/MSIX memory region implementation.
  * The handler handles both MSI and MSIX.
@@ -595,6 +608,7 @@ static int spapr_phb_init(SysBusDevice *s)
                            pci_spapr_set_irq, pci_spapr_map_irq, sphb,
                            &sphb->memspace, &sphb->iospace,
                            PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
+    pci_bus_set_route_irq_fn(bus, spapr_phb_route_intx_to_irq);
     phb->bus = bus;
 
     sphb->dma_window_start = 0;
diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index 66364c5..6ed1f4d 100644
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -97,6 +97,7 @@ struct ICSIRQState {
 
 qemu_irq xics_get_qirq(XICSState *icp, int irq);
 void xics_set_irq_type(XICSState *icp, int irq, bool lsi);
+int xics_get_irq_offset(XICSState *icp);
 
 void xics_cpu_setup(XICSState *icp, PowerPCCPU *cpu);
 
-- 
1.8.1.4