[Xen-devel] [PATCH] x86: drop pointless CONFIG_X86_HT

["Jan Beulich" <JBeulich@xxxxxxxx>]

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
This requires the patch series at
http://lists.xenproject.org/archives/html/xen-devel/2014-06/msg03336.html 
as a prerequisite.

--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -385,7 +385,6 @@ static void check_syscfg_dram_mod_en(voi
 
 static void __devinit amd_get_topology(struct cpuinfo_x86 *c)
 {
-#ifdef CONFIG_X86_HT
         int cpu;
         unsigned bits;
 
@@ -423,7 +422,6 @@ static void __devinit amd_get_topology(s
                                                          "Core",
                        cpu_has(c, X86_FEATURE_TOPOEXT) ? c->compute_unit_id :
                                                          c->cpu_core_id);
-#endif
 }
 
 static void __devinit init_amd(struct cpuinfo_x86 *c)
--- a/xen/arch/x86/cpu/common.c
+++ b/xen/arch/x86/cpu/common.c
@@ -233,6 +233,7 @@ static void __cpuinit generic_identify(s
                c->x86_model += ((tfms >> 16) & 0xF) << 4;
        c->x86_mask = tfms & 15;
        c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
+       c->phys_proc_id = c->apicid;
        if ( cpu_has(c, X86_FEATURE_CLFLSH) )
                c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
 
@@ -257,10 +258,6 @@ static void __cpuinit generic_identify(s
        }
 
        early_intel_workaround(c);
-
-#ifdef CONFIG_X86_HT
-       c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
-#endif
 }
 
 /*
@@ -429,7 +426,6 @@ void __cpuinit detect_extended_topology(
        }
 }
 
-#ifdef CONFIG_X86_HT
 void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 {
        u32     eax, ebx, ecx, edx;
@@ -474,7 +470,6 @@ void __cpuinit detect_ht(struct cpuinfo_
                               c->cpu_core_id);
        }
 }
-#endif
 
 unsigned int __init apicid_to_socket(unsigned int apicid)
 {
--- a/xen/include/asm-x86/config.h
+++ b/xen/include/asm-x86/config.h
@@ -17,7 +17,6 @@
 #define BITS_PER_XEN_ULONG BITS_PER_LONG
 
 #define CONFIG_X86 1
-#define CONFIG_X86_HT 1
 #define CONFIG_PAGING_ASSISTANCE 1
 #define CONFIG_X86_LOCAL_APIC 1
 #define CONFIG_X86_GOOD_APIC 1
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -211,11 +211,7 @@ extern void dodgy_tsc(void);
 
 extern void detect_extended_topology(struct cpuinfo_x86 *c);
 
-#ifdef CONFIG_X86_HT
 extern void detect_ht(struct cpuinfo_x86 *c);
-#else
-static always_inline void detect_ht(struct cpuinfo_x86 *c) {}
-#endif
 
 #define cpu_to_core(_cpu)   (cpu_data[_cpu].cpu_core_id)
 #define cpu_to_socket(_cpu) (cpu_data[_cpu].phys_proc_id)

Attachment: x86-drop-X86_HT.patch
Description: Text document

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