diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-09-16 18:35:18 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-11-04 16:03:24 -0500 |
| commit | fa19fe4e3a61765ff60914ee00fc1e7a6a38dba9 (patch) | |
| tree | d4745879c1eed8b8a373ba0fa6225c8671e75668 | |
| parent | 14bd0f3865489d537a93b7c80617622473f224e4 (diff) | |
hw/pci-bridge/cxl-upstream: Add properties to control link speed and width
To establish performance characteristics of a CXL device when used via a
particular CXL topology (root ports, switches, end points) it is necessary
to set the appropriate link speed and width in the PCI Express capability
structure. Provide x-speed and x-link properties for this.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20240916173518.1843023-7-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/pci-bridge/cxl_upstream.c | 6 | ||||
| -rw-r--r-- | include/hw/pci-bridge/cxl_upstream_port.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c index a5a39cc524..55f8b0053f 100644 --- a/hw/pci-bridge/cxl_upstream.c +++ b/hw/pci-bridge/cxl_upstream.c @@ -11,6 +11,7 @@ #include "qemu/osdep.h" #include "qemu/log.h" #include "hw/qdev-properties.h" +#include "hw/qdev-properties-system.h" #include "hw/pci/msi.h" #include "hw/pci/pcie.h" #include "hw/pci/pcie_port.h" @@ -100,6 +101,7 @@ static void cxl_usp_reset(DeviceState *qdev) pci_bridge_reset(qdev); pcie_cap_deverr_reset(d); + pcie_cap_fill_link_ep_usp(d, usp->width, usp->speed); latch_registers(usp); } @@ -363,6 +365,10 @@ static void cxl_usp_exitfn(PCIDevice *d) static Property cxl_upstream_props[] = { DEFINE_PROP_UINT64("sn", CXLUpstreamPort, sn, UI64_NULL), DEFINE_PROP_STRING("cdat", CXLUpstreamPort, cxl_cstate.cdat.filename), + DEFINE_PROP_PCIE_LINK_SPEED("x-speed", CXLUpstreamPort, + speed, PCIE_LINK_SPEED_32), + DEFINE_PROP_PCIE_LINK_WIDTH("x-width", CXLUpstreamPort, + width, PCIE_LINK_WIDTH_16), DEFINE_PROP_END_OF_LIST() }; diff --git a/include/hw/pci-bridge/cxl_upstream_port.h b/include/hw/pci-bridge/cxl_upstream_port.h index 12635139f6..f208397ffe 100644 --- a/include/hw/pci-bridge/cxl_upstream_port.h +++ b/include/hw/pci-bridge/cxl_upstream_port.h @@ -12,6 +12,10 @@ typedef struct CXLUpstreamPort { /*< public >*/ CXLComponentState cxl_cstate; CXLCCI swcci; + + PCIExpLinkSpeed speed; + PCIExpLinkWidth width; + DOECap doe_cdat; uint64_t sn; } CXLUpstreamPort; |