linux/arch/x86/kernel/cpu/topology.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ARCH_X86_TOPOLOGY_H
#define ARCH_X86_TOPOLOGY_H

struct topo_scan { … };

void cpu_init_topology(struct cpuinfo_x86 *c);
void cpu_parse_topology(struct cpuinfo_x86 *c);
void topology_set_dom(struct topo_scan *tscan, enum x86_topology_domains dom,
		      unsigned int shift, unsigned int ncpus);
bool cpu_parse_topology_ext(struct topo_scan *tscan);
void cpu_parse_topology_amd(struct topo_scan *tscan);
void cpu_topology_fixup_amd(struct topo_scan *tscan);

static inline u32 topo_shift_apicid(u32 apicid, enum x86_topology_domains dom)
{ … }

static inline u32 topo_relative_domain_id(u32 apicid, enum x86_topology_domains dom)
{ … }

static inline u32 topo_domain_mask(enum x86_topology_domains dom)
{ … }

/*
 * Update a domain level after the fact without propagating. Used to fixup
 * broken CPUID enumerations.
 */
static inline void topology_update_dom(struct topo_scan *tscan, enum x86_topology_domains dom,
				       unsigned int shift, unsigned int ncpus)
{ … }

#ifdef CONFIG_X86_LOCAL_APIC
unsigned int topology_unit_count(u32 apicid, enum x86_topology_domains which_units,
				 enum x86_topology_domains at_level);
#else
static inline unsigned int topology_unit_count(u32 apicid, enum x86_topology_domains which_units,
					       enum x86_topology_domains at_level)
{
	return 1;
}
#endif

#endif /* ARCH_X86_TOPOLOGY_H */