On Wed, Oct 23, 2024 at 05:21:40PM +0000, Yazen Ghannam wrote: > The "root" device search was introduced to support SMN access for Zen > systems. This device represents a PCIe root complex. It is not the > same as the "CPU/node" devices found at slots 0x18-0x1F. > > There may be multiple PCIe root complexes within an AMD node. Such is > the case with server or HEDT systems, etc. Therefore it is not enough to HEDT? ... > +struct pci_dev *amd_node_get_root(u16 node) > +{ > + struct pci_dev *df_f0 __free(pci_dev_put) = NULL; > + struct pci_dev *root; > + u16 cntl_off; > + u8 bus; > + > + if (!boot_cpu_has(X86_FEATURE_ZEN)) check_for_deprecated_apis: WARNING: arch/x86/kernel/amd_node.c:67: Do not use boot_cpu_has() - use cpu_feature_enabled() instead > + return NULL; -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette