diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-02-27 15:31:27 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-03-07 19:51:07 -0500 |
| commit | 84344ee2da1f8a23819c15361298d997d9e69dbf (patch) | |
| tree | ac01c4fec77128ae7c439f95422f8c1a2cae6410 /include/hw | |
| parent | 415442a1b4ad31521bbe7ae8bf4ee5d25af3977f (diff) | |
hw/pci: Add pcie_count_ds_port() and pcie_find_port_first() helpers
These two helpers enable host bridges to operate differently depending on
the number of downstream ports, in particular if there is only a single
port.
Useful for CXL where HDM address decoders are allowed to be implicit in
the host bridge if there is only a single root port.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20230227153128.8164-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/pci/pcie_port.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h index 6c40e3733f..90e6cf45b8 100644 --- a/include/hw/pci/pcie_port.h +++ b/include/hw/pci/pcie_port.h @@ -41,6 +41,8 @@ struct PCIEPort { void pcie_port_init_reg(PCIDevice *d); PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn); +PCIDevice *pcie_find_port_first(PCIBus *bus); +int pcie_count_ds_ports(PCIBus *bus); #define TYPE_PCIE_SLOT "pcie-slot" OBJECT_DECLARE_SIMPLE_TYPE(PCIESlot, PCIE_SLOT) |