On Thu, Oct 31, 2024 at 12:20:27PM +0100, Borislav Petkov wrote: > 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? > Sorry, forgot to spell it: High-end Desktop. > ... > > > +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 > Ack. Thanks, Yazen