@@ -1164,6 +1164,33 @@ static AddressSpace *pnv_phb4_dma_iommu(PCIBus *bus, void *opaque, int devfn)
return &ds->dma_as;
}
+/*
+ * Set the object properties of a phb in relation with its stack.
+ *
+ * Note: stack->pec must not be NULL.
+ */
+void pnv_phb4_set_stack_phb_props(PnvPhb4PecStack *stack,
+ PnvPHB4 *phb)
+{
+ PnvPhb4PecState *pec = stack->pec;
+ PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
+ char name[64];
+
+ snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci-stack-%d-phb",
+ pec->chip_id, pec->index, stack->stack_no);
+ pnv_xscom_region_init(&stack->phb_regs_mr, OBJECT(phb),
+ &pnv_phb4_xscom_ops, phb, name, 0x40);
+
+ object_property_set_int(OBJECT(phb), "chip-id", pec->chip_id,
+ &error_fatal);
+ object_property_set_int(OBJECT(phb), "version", pecc->version,
+ &error_fatal);
+ object_property_set_int(OBJECT(phb), "device-id", pecc->device_id,
+ &error_fatal);
+ object_property_set_link(OBJECT(phb), "stack", OBJECT(stack),
+ &error_abort);
+}
+
static void pnv_phb4_instance_init(Object *obj)
{
PnvPHB4 *phb = PNV_PHB4(obj);
@@ -595,19 +595,7 @@ static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
PHB4_PEC_PCI_STK_REGS_COUNT);
/* PHB pass-through */
- snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci-stack-%d-phb",
- pec->chip_id, pec->index, stack->stack_no);
- pnv_xscom_region_init(&stack->phb_regs_mr, OBJECT(&stack->phb),
- &pnv_phb4_xscom_ops, &stack->phb, name, 0x40);
-
- object_property_set_int(OBJECT(&stack->phb), "chip-id", pec->chip_id,
- &error_fatal);
- object_property_set_int(OBJECT(&stack->phb), "version", pecc->version,
- &error_fatal);
- object_property_set_int(OBJECT(&stack->phb), "device-id", pecc->device_id,
- &error_fatal);
- object_property_set_link(OBJECT(&stack->phb), "stack", OBJECT(stack),
- &error_abort);
+ pnv_phb4_set_stack_phb_props(stack, &stack->phb);
if (!sysbus_realize(SYS_BUS_DEVICE(&stack->phb), errp)) {
return;
}
@@ -133,6 +133,7 @@ struct PnvPHB4 {
void pnv_phb4_pic_print_info(PnvPHB4 *phb, Monitor *mon);
void pnv_phb4_update_regions(PnvPhb4PecStack *stack);
+void pnv_phb4_set_stack_phb_props(PnvPhb4PecStack *stack, PnvPHB4 *phb);
extern const MemoryRegionOps pnv_phb4_xscom_ops;
/*
We want to be able to support user creatable pnv-phb4 objects to allow users to instantiate a powernv9 machine similar to what it is done with powernv8. The main difference is that pnv-phb3 devs are attached directly to the system bus and can be created in the command line. PCI devices such as root-ports can be explictly connected to them. This allows users to create the phbs, assign a bus name if desired, then connect devices onto them. pnv-phb4 devices on the other hand are created by adding PCI Express Controllers (PEC) that will create a certain amount of pnv-phb4 buses depending on the PEC index used. Index 0 will create 1 phb, index 1 creates 2 phbs, index 2 creates 3 phbs. Creating all PECs from the same chip will create 6 PHBs. This doesn't users to rename the buses, like it is done with pnv-phb3, because there's no user control over how the pnv-phb4 are being created - aside from the amount of phbs and in which chips they'll reside. This implicit relationship between PEC devices and available buses can be tolerable for users that knows how the hardware works, but it's annoying for Libvirt to deal with. Since there's no explicit relationship, in the command line, between the created buses and the PCI devices that will connect to them, the domain XML needs to make a lot of extra assumptions regarding the relationship between regular PCI devices and the existing PECs. The first step to allow for user creatable pnv-phb4 devices is to decouple the pvn-phb logic from the pnv-phb4-pec code. This patch adds a helper called pnv_phb4_set_stack_phb_props() to remove the code from pnv_phb4_pec.c that initiates the object properties of pnv-phb4 devices. Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> --- hw/pci-host/pnv_phb4.c | 27 +++++++++++++++++++++++++++ hw/pci-host/pnv_phb4_pec.c | 14 +------------- include/hw/pci-host/pnv_phb4.h | 1 + 3 files changed, 29 insertions(+), 13 deletions(-)