On Friday, October 4, 2019 1:43:27 PM CEST Jonathan Cameron wrote: > Generic Initiators are a new ACPI concept that allows for the > description of proximity domains that contain a device which > performs memory access (such as a network card) but neither > host CPU nor Memory. > > This patch has the parsing code and provides the infrastructure > for an architecture to associate these new domains with their > nearest memory processing node. > > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> This depends on the series from Dan at: https://lore.kernel.org/linux-acpi/CAPcyv4gBSX58CWH4HZ28w0_cZRzJrhgdEFHa2g8KDqyv8aFqZQ@xxxxxxxxxxxxxx/T/#m1acce3ae8f29f680c0d95fd1e840e703949fbc48 AFAICS, so please respin when that one hits the Linus' tree. > --- > drivers/acpi/numa/srat.c | 62 +++++++++++++++++++++++++++++++++- > drivers/base/node.c | 3 ++ > include/asm-generic/topology.h | 3 ++ > include/linux/nodemask.h | 1 + > include/linux/topology.h | 7 ++++ > 5 files changed, 75 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c > index eadbf90e65d1..fe34315a9234 100644 > --- a/drivers/acpi/numa/srat.c > +++ b/drivers/acpi/numa/srat.c > @@ -170,6 +170,38 @@ acpi_table_print_srat_entry(struct acpi_subtable_header *header) > } > break; > > + case ACPI_SRAT_TYPE_GENERIC_AFFINITY: > + { > + struct acpi_srat_generic_affinity *p = > + (struct acpi_srat_generic_affinity *)header; > + char name[9] = {}; > + > + if (p->device_handle_type == 0) { > + /* > + * For pci devices this may be the only place they > + * are assigned a proximity domain > + */ > + pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n", > + *(u16 *)(&p->device_handle[0]), > + *(u16 *)(&p->device_handle[2]), > + p->proximity_domain, > + (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ? > + "enabled" : "disabled"); > + } else { > + /* > + * In this case we can rely on the device having a > + * proximity domain reference > + */ > + memcpy(name, p->device_handle, 8); > + pr_info("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n", > + (char *)(&p->device_handle[0]), > + (char *)(&p->device_handle[8]), > + p->proximity_domain, > + (p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ? > + "enabled" : "disabled"); > + } > + } > + break; > default: > pr_warn("Found unsupported SRAT entry (type = 0x%x)\n", > header->type); > @@ -378,6 +410,32 @@ acpi_parse_gicc_affinity(union acpi_subtable_headers *header, > return 0; > } > > +static int __init > +acpi_parse_gi_affinity(union acpi_subtable_headers *header, > + const unsigned long end) > +{ > + struct acpi_srat_generic_affinity *gi_affinity; > + int node; > + > + gi_affinity = (struct acpi_srat_generic_affinity *)header; > + if (!gi_affinity) > + return -EINVAL; > + acpi_table_print_srat_entry(&header->common); > + > + if (!(gi_affinity->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED)) > + return -EINVAL; > + > + node = acpi_map_pxm_to_node(gi_affinity->proximity_domain); > + if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { > + pr_err("SRAT: Too many proximity domains.\n"); > + return -EINVAL; > + } > + node_set(node, numa_nodes_parsed); > + node_set_state(node, N_GENERIC_INITIATOR); > + > + return 0; > +} > + > static int __initdata parsed_numa_memblks; > > static int __init > @@ -433,7 +491,7 @@ int __init acpi_numa_init(void) > > /* SRAT: System Resource Affinity Table */ > if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { > - struct acpi_subtable_proc srat_proc[3]; > + struct acpi_subtable_proc srat_proc[4]; > > memset(srat_proc, 0, sizeof(srat_proc)); > srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY; > @@ -442,6 +500,8 @@ int __init acpi_numa_init(void) > srat_proc[1].handler = acpi_parse_x2apic_affinity; > srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY; > srat_proc[2].handler = acpi_parse_gicc_affinity; > + srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY; > + srat_proc[3].handler = acpi_parse_gi_affinity; > > acpi_table_parse_entries_array(ACPI_SIG_SRAT, > sizeof(struct acpi_table_srat), > diff --git a/drivers/base/node.c b/drivers/base/node.c > index 296546ffed6c..e5863baa8cb6 100644 > --- a/drivers/base/node.c > +++ b/drivers/base/node.c > @@ -977,6 +977,8 @@ static struct node_attr node_state_attr[] = { > #endif > [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), > [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), > + [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator, > + N_GENERIC_INITIATOR), > }; > > static struct attribute *node_state_attrs[] = { > @@ -988,6 +990,7 @@ static struct attribute *node_state_attrs[] = { > #endif > &node_state_attr[N_MEMORY].attr.attr, > &node_state_attr[N_CPU].attr.attr, > + &node_state_attr[N_GENERIC_INITIATOR].attr.attr, > NULL > }; > > diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h > index 238873739550..54d0b4176a45 100644 > --- a/include/asm-generic/topology.h > +++ b/include/asm-generic/topology.h > @@ -71,6 +71,9 @@ > #ifndef set_cpu_numa_mem > #define set_cpu_numa_mem(cpu, node) > #endif > +#ifndef set_gi_numa_mem > +#define set_gi_numa_mem(gi, node) > +#endif > > #endif /* !CONFIG_NUMA || !CONFIG_HAVE_MEMORYLESS_NODES */ > > diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h > index 27e7fa36f707..1aebf766fb52 100644 > --- a/include/linux/nodemask.h > +++ b/include/linux/nodemask.h > @@ -399,6 +399,7 @@ enum node_states { > #endif > N_MEMORY, /* The node has memory(regular, high, movable) */ > N_CPU, /* The node has one or more cpus */ > + N_GENERIC_INITIATOR, /* The node is a GI only node */ > NR_NODE_STATES > }; > > diff --git a/include/linux/topology.h b/include/linux/topology.h > index eb2fe6edd73c..05ccf011e489 100644 > --- a/include/linux/topology.h > +++ b/include/linux/topology.h > @@ -140,6 +140,13 @@ static inline void set_numa_mem(int node) > } > #endif > > +#ifndef set_gi_numa_mem > +static inline void set_gi_numa_mem(int gi, int node) > +{ > + _node_numa_mem_[gi] = node; > +} > +#endif > + > #ifndef node_to_mem_node > static inline int node_to_mem_node(int node) > { >
