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s390/numa: add core infrastructure

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Enable core NUMA support for s390 and add one simple default mode "plain"
that creates one single NUMA node.

This patch contains several changes from Michael Holzheu.

Signed-off-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Philipp Hachtmann
2014-03-06 18:25:13 +01:00
committed by Martin Schwidefsky
parent 199071f108
commit 3a368f742d
15 changed files with 375 additions and 26 deletions
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39
arch/s390/include/asm/topology.h
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@@ -2,6 +2,7 @@
#define _ASM_S390_TOPOLOGY_H
#include <linux/cpumask.h>
#include <asm/numa.h>
struct sysinfo_15_1_x;
struct cpu;
@@ -13,6 +14,7 @@ struct cpu_topology_s390 {
unsigned short core_id;
unsigned short socket_id;
unsigned short book_id;
unsigned short node_id;
cpumask_t thread_mask;
cpumask_t core_mask;
cpumask_t book_mask;
@@ -52,6 +54,43 @@ static inline void topology_expect_change(void) { }
#define POLARIZATION_VM (2)
#define POLARIZATION_VH (3)
#define SD_BOOK_INIT SD_CPU_INIT
#ifdef CONFIG_NUMA
#define cpu_to_node cpu_to_node
static inline int cpu_to_node(int cpu)
{
return per_cpu(cpu_topology, cpu).node_id;
}
/* Returns a pointer to the cpumask of CPUs on node 'node'. */
#define cpumask_of_node cpumask_of_node
static inline const struct cpumask *cpumask_of_node(int node)
{
return node_to_cpumask_map[node];
}
/*
* 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)
#define node_distance(a, b) __node_distance(a, b)
#else /* !CONFIG_NUMA */
#define numa_node_id numa_node_id
static inline int numa_node_id(void)
{
return 0;
}
#endif /* CONFIG_NUMA */
#include <asm-generic/topology.h>
#endif /* _ASM_S390_TOPOLOGY_H */