[Xen-devel] [PATCH v5 04/22] xen/arm: Set nr_cpu_ids to available number of cpus

[vijay.kilari@xxxxxxxxx]

From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>

nr_cpu_ids for arm platforms is set to 128 irrespective of
number of cpus supported by platform.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
---
 xen/arch/arm/setup.c      |    1 +
 xen/arch/arm/smpboot.c    |   11 +++++++++++
 xen/include/asm-arm/smp.h |    1 +
 3 files changed, 13 insertions(+)

diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index a46c583..6ca787b 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -772,6 +772,7 @@ void __init start_xen(unsigned long boot_phys_offset,
 
     smp_init_cpus();
     cpus = smp_get_max_cpus();
+    set_nr_cpu_ids(cpus);
 
     init_xen_time();
 
diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index a96cda2..233ad95 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -243,6 +243,17 @@ void __init smp_init_cpus(void)
     }
 }
 
+void __init set_nr_cpu_ids(unsigned int max_cpus)
+{
+    if ( !max_cpus )
+        max_cpus = 1;
+   else if ( max_cpus > NR_CPUS )
+        max_cpus = NR_CPUS;
+
+    printk(XENLOG_INFO "SMP: Allowing %u CPUs\n", max_cpus);
+    nr_cpu_ids = max_cpus;
+}
+
 int __init
 smp_get_max_cpus (void)
 {
diff --git a/xen/include/asm-arm/smp.h b/xen/include/asm-arm/smp.h
index 91b1e52..c23bd0f 100644
--- a/xen/include/asm-arm/smp.h
+++ b/xen/include/asm-arm/smp.h
@@ -29,6 +29,7 @@ extern void init_secondary(void);
 extern void smp_init_cpus(void);
 extern void smp_clear_cpu_maps (void);
 extern int smp_get_max_cpus (void);
+extern void set_nr_cpu_ids(unsigned int max_cpus);
 #endif
 
 /*
-- 
1.7.9.5


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