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SubjectRe: [PATCH 1/5] perf/x86/intel/uncore: Parse uncore discovery tables
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On 3/16/2021 7:40 AM, Peter Zijlstra wrote:
> On Fri, Mar 12, 2021 at 08:34:34AM -0800, kan.liang@linux.intel.com wrote:
>> +static struct intel_uncore_discovery_type *
>> +search_uncore_discovery_type(u16 type_id)
>> +{
>> + struct rb_node *node = discovery_tables.rb_node;
>> + struct intel_uncore_discovery_type *type;
>> +
>> + while (node) {
>> + type = rb_entry(node, struct intel_uncore_discovery_type, node);
>> +
>> + if (type->type > type_id)
>> + node = node->rb_left;
>> + else if (type->type < type_id)
>> + node = node->rb_right;
>> + else
>> + return type;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static struct intel_uncore_discovery_type *
>> +add_uncore_discovery_type(struct uncore_unit_discovery *unit)
>> +{
>> + struct intel_uncore_discovery_type *type, *cur;
>> + struct rb_node **node = &discovery_tables.rb_node;
>> + struct rb_node *parent = *node;
>> +
>> + if (unit->access_type >= UNCORE_ACCESS_MAX) {
>> + pr_warn("Unsupported access type %d\n", unit->access_type);
>> + return NULL;
>> + }
>> +
>> + type = kzalloc(sizeof(struct intel_uncore_discovery_type), GFP_KERNEL);
>> + if (!type)
>> + return NULL;
>> +
>> + type->box_ctrl_die = kcalloc(__uncore_max_dies, sizeof(u64), GFP_KERNEL);
>> + if (!type->box_ctrl_die)
>> + goto free_type;
>> +
>> + type->access_type = unit->access_type;
>> + num_discovered_types[type->access_type]++;
>> + type->type = unit->box_type;
>> +
>> + while (*node) {
>> + parent = *node;
>> + cur = rb_entry(parent, struct intel_uncore_discovery_type, node);
>> +
>> + if (cur->type > type->type)
>> + node = &parent->rb_left;
>> + else
>> + node = &parent->rb_right;
>> + }
>> +
>> + rb_link_node(&type->node, parent, node);
>> + rb_insert_color(&type->node, &discovery_tables);
>> +
>> + return type;
>> +
>> +free_type:
>> + kfree(type);
>> +
>> + return NULL;
>> +
>> +}
>
> I'm thinking this can use some of this:
>
> 2d24dd5798d0 ("rbtree: Add generic add and find helpers")
>

Sure, I will use the generic rbtree framework in V2.

Thanks,
Kan

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