@@ -25,4 +25,9 @@
struct pci_dev *amd_node_get_func(u16 node, u8 func);
struct pci_dev *amd_node_get_root(u16 node);
+static inline u16 amd_num_nodes(void)
+{
+ return topology_amd_nodes_per_pkg() * topology_max_packages();
+}
+
#endif /*_ASM_X86_AMD_NODE_H_*/
@@ -186,7 +186,6 @@ static int amd_cache_northbridges(void)
const struct pci_device_id *misc_ids = amd_nb_misc_ids;
struct pci_dev *misc;
struct amd_northbridge *nb;
- u16 misc_count = 0;
u16 i;
if (amd_northbridges.num)
@@ -196,19 +195,13 @@ static int amd_cache_northbridges(void)
misc_ids = hygon_nb_misc_ids;
}
- misc = NULL;
- while ((misc = next_northbridge(misc, misc_ids)))
- misc_count++;
-
- if (!misc_count)
- return -ENODEV;
+ amd_northbridges.num = amd_num_nodes();
- nb = kcalloc(misc_count, sizeof(struct amd_northbridge), GFP_KERNEL);
+ nb = kcalloc(amd_northbridges.num, sizeof(struct amd_northbridge), GFP_KERNEL);
if (!nb)
return -ENOMEM;
amd_northbridges.nb = nb;
- amd_northbridges.num = misc_count;
misc = NULL;
for (i = 0; i < amd_northbridges.num; i++) {
Currently, the total AMD node count is determined by searching and counting CPU/node devices using PCI IDs. However, AMD node information is already available through topology CPUID/MSRs. The recent topology rework has made this info easier to access. Replace the node counting code with a simple product of topology info. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> --- Notes: Link: https://lore.kernel.org/20241023172150.659002-8-yazen.ghannam@amd.com v1->v2: * No change. arch/x86/include/asm/amd_node.h | 5 +++++ arch/x86/kernel/amd_nb.c | 11 ++--------- 2 files changed, 7 insertions(+), 9 deletions(-)