[Xen-devel] [Patch 1/2]xen boot_cpu_data initialize

[Uma Sharma <uma.sharma523@xxxxxxxxx>]

This patch inserts some boot data initilization in xen/arch and
function definition in xen/include.
Signed-off-by: Uma Sharma <uma.sharma523@xxxxxxxxx>
---

diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index d316212..4f3ce15 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -1259,6 +1259,11 @@ void __init noreturn __start_xen(unsigned long mbi_p)
     microcode_grab_module(module_map, mbi, bootstrap_map);
 
     timer_init();
+    /*
+     * Identify the boot CPU, in case the scheduler initialization
+     * needs to know about it (e.g., topology, etc.)
+     */
+    identify_cpu(&boot_cpu_data);
 
     init_idle_domain();
 
@@ -1270,8 +1275,6 @@ void __init noreturn __start_xen(unsigned long mbi_p)
 
     arch_init_memory();
 
-    identify_cpu(&boot_cpu_data);
-
     if ( cpu_has_fxsr )
         set_in_cr4(X86_CR4_OSFXSR);
     if ( cpu_has_xmm )
diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 7ae561c..b4c4cc2 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -59,7 +59,8 @@ DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_mask);
 cpumask_t cpu_online_map __read_mostly;
 EXPORT_SYMBOL(cpu_online_map);
 
-struct cpuinfo_x86 cpu_data[NR_CPUS];
+struct cpuinfo_x86 cpu_data[NR_CPUS] =
+        { [0 ... NR_CPUS-1] = { .phys_proc_id=-1, .cpu_core_id=-1 } };
 
 u32 x86_cpu_to_apicid[NR_CPUS] __read_mostly =
        { [0 ... NR_CPUS-1] = BAD_APICID };
diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h
index 87d80ff..6ec9588 100644
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -214,7 +214,9 @@ extern void detect_extended_topology(struct cpuinfo_x86 *c);
 
 extern void detect_ht(struct cpuinfo_x86 *c);
 
+#define boot_cpu_to_core()   (boot_cpu_data.cpu_core_id)
 #define cpu_to_core(_cpu)   (cpu_data[_cpu].cpu_core_id)
+#define boot_cpu_to_socket() (boot_cpu_data.phys_proc_id)
 #define cpu_to_socket(_cpu) (cpu_data[_cpu].phys_proc_id)
 
 unsigned int apicid_to_socket(unsigned int);

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