Add an accessor function amd_get_nodes_cnt() which returns
the number of nodes per socket.
In a subsequent patch, we will use this info in EDAC
mce_amd_inj module.
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Borislav Petkov <b...@suse.de>
Cc: Jacob Shin <jacob.w.s...@gmail.com>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Denys Vlasenko <dvlas...@redhat.com>
Cc: Hector Marco-Gisbert <hecma...@upv.es>
Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrish...@amd.com>
---
arch/x86/include/asm/processor.h | 1 +
arch/x86/kernel/cpu/amd.c | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 8e04f51..34faf24 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -820,6 +820,7 @@ static inline int mpx_disable_management(struct task_struct
*tsk)
#endif /* CONFIG_X86_INTEL_MPX */
extern u16 amd_get_nb_id(int cpu);
+extern u32 amd_get_nodes_cnt(void);
static inline uint32_t hypervisor_cpuid_base(const char *sig, uint32_t leaves)
{
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 487083b..788655a 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -373,6 +373,12 @@ u16 amd_get_nb_id(int cpu)
}
EXPORT_SYMBOL_GPL(amd_get_nb_id);
+u32 amd_get_nodes_cnt(void)
+{
+ return nodes_per_processor;
+}
+EXPORT_SYMBOL_GPL(amd_get_nodes_cnt);
+
static void srat_detect_node(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_NUMA
--
2.4.0
--
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