diff options
Diffstat (limited to 'hw/pci')
| -rw-r--r-- | hw/pci/pci_bridge.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c index 720119b21a..17feae5ed8 100644 --- a/hw/pci/pci_bridge.c +++ b/hw/pci/pci_bridge.c @@ -408,6 +408,52 @@ void pci_bridge_map_irq(PCIBridge *br, const char* bus_name, br->bus_name = bus_name; } + +int pci_bridge_qemu_reserve_cap_init(PCIDevice *dev, int cap_offset, + uint32_t bus_reserve, uint64_t io_reserve, + uint32_t mem_non_pref_reserve, + uint32_t mem_pref_32_reserve, + uint64_t mem_pref_64_reserve, + Error **errp) +{ + if (mem_pref_32_reserve != (uint32_t)-1 && + mem_pref_64_reserve != (uint64_t)-1) { + error_setg(errp, + "PCI resource reserve cap: PREF32 and PREF64 conflict"); + return -EINVAL; + } + + if (bus_reserve == (uint32_t)-1 && + io_reserve == (uint64_t)-1 && + mem_non_pref_reserve == (uint32_t)-1 && + mem_pref_32_reserve == (uint32_t)-1 && + mem_pref_64_reserve == (uint64_t)-1) { + return 0; + } + + size_t cap_len = sizeof(PCIBridgeQemuCap); + PCIBridgeQemuCap cap = { + .len = cap_len, + .type = REDHAT_PCI_CAP_RESOURCE_RESERVE, + .bus_res = bus_reserve, + .io = io_reserve, + .mem = mem_non_pref_reserve, + .mem_pref_32 = mem_pref_32_reserve, + .mem_pref_64 = mem_pref_64_reserve + }; + + int offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, + cap_offset, cap_len, errp); + if (offset < 0) { + return offset; + } + + memcpy(dev->config + offset + PCI_CAP_FLAGS, + (char *)&cap + PCI_CAP_FLAGS, + cap_len - PCI_CAP_FLAGS); + return 0; +} + static const TypeInfo pci_bridge_type_info = { .name = TYPE_PCI_BRIDGE, .parent = TYPE_PCI_DEVICE, |