[Xen-devel] [PATCH] linux/x86-64: adjustments to match i386 behavior

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

On i386 the corresponding code is inside X86_HT conditionals, and this
config variable is unconditionally off for X86_XEN.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/arch/x86_64/kernel/setup-xen.c
+++ b/arch/x86_64/kernel/setup-xen.c
@@ -1048,7 +1048,7 @@ static int nearby_node(int apicid)
  */
 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 {
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
        unsigned bits;
 #ifdef CONFIG_NUMA
        int cpu = smp_processor_id();
@@ -1162,7 +1162,7 @@ static void __init init_amd(struct cpuin
 
 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 {
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
        u32     eax, ebx, ecx, edx;
        int     index_msb, core_bits;
 
@@ -1347,7 +1347,7 @@ void __cpuinit early_identify_cpu(struct
                c->x86 = 4;
        }
 
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
        c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
 #endif
 }
@@ -1555,7 +1555,7 @@ static int show_cpuinfo(struct seq_file 
        if (c->x86_cache_size >= 0) 
                seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
        
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
        if (smp_num_siblings * c->x86_max_cores > 1) {
                int cpu = c - cpu_data;
                seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
--- a/include/asm-x86_64/topology.h
+++ b/include/asm-x86_64/topology.h
@@ -54,7 +54,7 @@ extern int __node_distance(int, int);
 
 #endif
 
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
 #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_siblings(cpu)            (cpu_core_map[cpu])

Attachment: xen-x86_64-no-topology.patch
Description: Text document

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