mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 11:56:45 +07:00
2ff799d3cf
Fix to prevent sched_mc_power_saving from being exported through sysfs
for multi-scoket single core system. Max cores should be always greater than
one (1). My earlier patch that introduced fix for not exporting
'sched_mc_power_saving' on laptops broke it on multi-socket single core
system. This fix addresses issue on both laptop and multi-socket single
core system.
Below are the Test results:
1. Single socket - multi-core
Before Patch: Does not export 'sched_mc_power_saving'
After Patch: Does not export 'sched_mc_power_saving'
Result: Pass
2. Multi Socket - single core
Before Patch: exports 'sched_mc_power_saving'
After Patch: Does not export 'sched_mc_power_saving'
Result: Pass
3. Multi Socket - Multi core
Before Patch: exports 'sched_mc_power_saving'
After Patch: exports 'sched_mc_power_saving'
[ Impact: make the sched_mc_power_saving control available more consistently ]
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Suresh B Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090511143914.GB4853@dirshya.in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
225 lines
5.5 KiB
C
225 lines
5.5 KiB
C
/*
|
|
* Written by: Matthew Dobson, IBM Corporation
|
|
*
|
|
* Copyright (C) 2002, IBM Corp.
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Send feedback to <colpatch@us.ibm.com>
|
|
*/
|
|
#ifndef _ASM_X86_TOPOLOGY_H
|
|
#define _ASM_X86_TOPOLOGY_H
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# ifdef CONFIG_X86_HT
|
|
# define ENABLE_TOPO_DEFINES
|
|
# endif
|
|
#else
|
|
# ifdef CONFIG_SMP
|
|
# define ENABLE_TOPO_DEFINES
|
|
# endif
|
|
#endif
|
|
|
|
/* Node not present */
|
|
#define NUMA_NO_NODE (-1)
|
|
|
|
#ifdef CONFIG_NUMA
|
|
#include <linux/cpumask.h>
|
|
#include <asm/mpspec.h>
|
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
/* Mappings between logical cpu number and node number */
|
|
extern int cpu_to_node_map[];
|
|
|
|
/* Returns the number of the node containing CPU 'cpu' */
|
|
static inline int cpu_to_node(int cpu)
|
|
{
|
|
return cpu_to_node_map[cpu];
|
|
}
|
|
#define early_cpu_to_node(cpu) cpu_to_node(cpu)
|
|
|
|
#else /* CONFIG_X86_64 */
|
|
|
|
/* Mappings between logical cpu number and node number */
|
|
DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
|
|
|
|
/* Returns the number of the current Node. */
|
|
DECLARE_PER_CPU(int, node_number);
|
|
#define numa_node_id() percpu_read(node_number)
|
|
|
|
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
|
|
extern int cpu_to_node(int cpu);
|
|
extern int early_cpu_to_node(int cpu);
|
|
|
|
#else /* !CONFIG_DEBUG_PER_CPU_MAPS */
|
|
|
|
/* Returns the number of the node containing CPU 'cpu' */
|
|
static inline int cpu_to_node(int cpu)
|
|
{
|
|
return per_cpu(x86_cpu_to_node_map, cpu);
|
|
}
|
|
|
|
/* Same function but used if called before per_cpu areas are setup */
|
|
static inline int early_cpu_to_node(int cpu)
|
|
{
|
|
return early_per_cpu(x86_cpu_to_node_map, cpu);
|
|
}
|
|
|
|
#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
|
|
|
|
#endif /* CONFIG_X86_64 */
|
|
|
|
/* Mappings between node number and cpus on that node. */
|
|
extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
|
|
|
|
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
|
|
extern const struct cpumask *cpumask_of_node(int node);
|
|
#else
|
|
/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
|
|
static inline const struct cpumask *cpumask_of_node(int node)
|
|
{
|
|
return node_to_cpumask_map[node];
|
|
}
|
|
#endif
|
|
|
|
extern void setup_node_to_cpumask_map(void);
|
|
|
|
/*
|
|
* Returns the number of the node containing Node 'node'. This
|
|
* architecture is flat, so it is a pretty simple function!
|
|
*/
|
|
#define parent_node(node) (node)
|
|
|
|
#define pcibus_to_node(bus) __pcibus_to_node(bus)
|
|
|
|
#ifdef CONFIG_X86_32
|
|
extern unsigned long node_start_pfn[];
|
|
extern unsigned long node_end_pfn[];
|
|
extern unsigned long node_remap_size[];
|
|
#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
|
|
|
|
# define SD_CACHE_NICE_TRIES 1
|
|
# define SD_IDLE_IDX 1
|
|
# define SD_NEWIDLE_IDX 2
|
|
# define SD_FORKEXEC_IDX 0
|
|
|
|
#else
|
|
|
|
# define SD_CACHE_NICE_TRIES 2
|
|
# define SD_IDLE_IDX 2
|
|
# define SD_NEWIDLE_IDX 2
|
|
# define SD_FORKEXEC_IDX 1
|
|
|
|
#endif
|
|
|
|
/* sched_domains SD_NODE_INIT for NUMA machines */
|
|
#define SD_NODE_INIT (struct sched_domain) { \
|
|
.min_interval = 8, \
|
|
.max_interval = 32, \
|
|
.busy_factor = 32, \
|
|
.imbalance_pct = 125, \
|
|
.cache_nice_tries = SD_CACHE_NICE_TRIES, \
|
|
.busy_idx = 3, \
|
|
.idle_idx = SD_IDLE_IDX, \
|
|
.newidle_idx = SD_NEWIDLE_IDX, \
|
|
.wake_idx = 1, \
|
|
.forkexec_idx = SD_FORKEXEC_IDX, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_BALANCE_FORK \
|
|
| SD_WAKE_AFFINE \
|
|
| SD_WAKE_BALANCE \
|
|
| SD_SERIALIZE, \
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
}
|
|
|
|
#ifdef CONFIG_X86_64_ACPI_NUMA
|
|
extern int __node_distance(int, int);
|
|
#define node_distance(a, b) __node_distance(a, b)
|
|
#endif
|
|
|
|
#else /* !CONFIG_NUMA */
|
|
|
|
static inline int numa_node_id(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int cpu_to_node(int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int early_cpu_to_node(int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline const struct cpumask *cpumask_of_node(int node)
|
|
{
|
|
return cpu_online_mask;
|
|
}
|
|
|
|
static inline void setup_node_to_cpumask_map(void) { }
|
|
|
|
#endif
|
|
|
|
#include <asm-generic/topology.h>
|
|
|
|
extern const struct cpumask *cpu_coregroup_mask(int cpu);
|
|
|
|
#ifdef ENABLE_TOPO_DEFINES
|
|
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
|
|
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
|
|
#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
|
|
#define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
|
|
|
|
/* indicates that pointers to the topology cpumask_t maps are valid */
|
|
#define arch_provides_topology_pointers yes
|
|
#endif
|
|
|
|
static inline void arch_fix_phys_package_id(int num, u32 slot)
|
|
{
|
|
}
|
|
|
|
struct pci_bus;
|
|
void x86_pci_root_bus_res_quirks(struct pci_bus *b);
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define mc_capable() ((boot_cpu_data.x86_max_cores > 1) && \
|
|
(cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
|
|
#define smt_capable() (smp_num_siblings > 1)
|
|
#endif
|
|
|
|
#ifdef CONFIG_NUMA
|
|
extern int get_mp_bus_to_node(int busnum);
|
|
extern void set_mp_bus_to_node(int busnum, int node);
|
|
#else
|
|
static inline int get_mp_bus_to_node(int busnum)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void set_mp_bus_to_node(int busnum, int node)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ASM_X86_TOPOLOGY_H */
|