[RFC for-5.1 2/4] spapr: Helper to determine if a device is NVLink2 related

[David Gibson <david@gibson.dropbear.id.au>]

This adds a simple exported helper function which determins if a given
(supposedly) PCI device is actually an NVLink2 device, which has some
special considerations.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr_pci_nvlink2.c  | 5 +++++
 include/hw/pci-host/spapr.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c
index 7d3a685421..0cec1ae02b 100644
--- a/hw/ppc/spapr_pci_nvlink2.c
+++ b/hw/ppc/spapr_pci_nvlink2.c
@@ -449,6 +449,11 @@ static bool is_nvnpu(PCIDevice *dev, SpaprPhbState *sphb, int *slot, int *link)
     return false;
 }
 
+bool spapr_phb_is_nvlink_dev(PCIDevice *dev, SpaprPhbState *sphb)
+{
+    return is_nvgpu(dev, sphb, NULL) || is_nvnpu(dev, sphb, NULL, NULL);
+}
+
 void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset,
                                         SpaprPhbState *sphb)
 {
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
index 8877ff51fb..eaba4a5825 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -156,6 +156,7 @@ void spapr_phb_nvgpu_free(SpaprPhbState *sphb);
 void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, int bus_off,
                                  Error **errp);
 void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt);
+bool spapr_phb_is_nvlink_dev(PCIDevice *dev, SpaprPhbState *sphb);
 void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset,
                                         SpaprPhbState *sphb);
 #else
-- 
2.25.1