x86: unify cpuid functions

cpuid is not very different between i386 and x86_64.
We move away the x86_64 version from msr.h, and
unify them at processor.h, where they belong.

cpuid() paravirt then comes for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 78 insertions, 136 deletions

diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h
index 5c95d0be1132..0648b2d57a38 100644
--- a/include/asm-x86/msr.h
+++ b/include/asm-x86/msr.h
@@ -203,73 +203,6 @@ static inline int wrmsr_safe(u32 __msr, u32 __low, u32 __high)
                           : "c" (counter))
 
 
-static inline void cpuid(int op, unsigned int *eax, unsigned int *ebx,
-                         unsigned int *ecx, unsigned int *edx)
-{
-        __asm__("cpuid"
-                : "=a" (*eax),
-                  "=b" (*ebx),
-                  "=c" (*ecx),
-                  "=d" (*edx)
-                : "0" (op));
-}
-
-/* Some CPUID calls want 'count' to be placed in ecx */
-static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
-                               int *edx)
-{
-        __asm__("cpuid"
-                : "=a" (*eax),
-                  "=b" (*ebx),
-                  "=c" (*ecx),
-                  "=d" (*edx)
-                : "0" (op), "c" (count));
-}
-
-/*
- * CPUID functions returning a single datum
- */
-static inline unsigned int cpuid_eax(unsigned int op)
-{
-        unsigned int eax;
-
-        __asm__("cpuid"
-                : "=a" (eax)
-                : "0" (op)
-                : "bx", "cx", "dx");
-        return eax;
-}
-static inline unsigned int cpuid_ebx(unsigned int op)
-{
-        unsigned int eax, ebx;
-
-        __asm__("cpuid"
-                : "=a" (eax), "=b" (ebx)
-                : "0" (op)
-                : "cx", "dx" );
-        return ebx;
-}
-static inline unsigned int cpuid_ecx(unsigned int op)
-{
-        unsigned int eax, ecx;
-
-        __asm__("cpuid"
-                : "=a" (eax), "=c" (ecx)
-                : "0" (op)
-                : "bx", "dx" );
-        return ecx;
-}
-static inline unsigned int cpuid_edx(unsigned int op)
-{
-        unsigned int eax, edx;
-
-        __asm__("cpuid"
-                : "=a" (eax), "=d" (edx)
-                : "0" (op)
-                : "bx", "cx");
-        return edx;
-}
-
 #ifdef __KERNEL__
 
 /* wrmsr with exception handling */
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 46e1c04e309c..dea81b70895d 100644
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -1,5 +1,83 @@
+#ifndef __ASM_X86_PROCESSOR_H
+#define __ASM_X86_PROCESSOR_H
+
+static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
+                                         unsigned int *ecx, unsigned int *edx)
+{
+        /* ecx is often an input as well as an output. */
+        __asm__("cpuid"
+                : "=a" (*eax),
+                  "=b" (*ebx),
+                  "=c" (*ecx),
+                  "=d" (*edx)
+                : "0" (*eax), "2" (*ecx));
+}
+
+
 #ifdef CONFIG_X86_32
 # include "processor_32.h"
 #else
 # include "processor_64.h"
 #endif
+
+#ifndef CONFIG_PARAVIRT
+#define __cpuid native_cpuid
+#endif
+
+/*
+ * Generic CPUID function
+ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+ * resulting in stale register contents being returned.
+ */
+static inline void cpuid(unsigned int op,
+                         unsigned int *eax, unsigned int *ebx,
+                         unsigned int *ecx, unsigned int *edx)
+{
+        *eax = op;
+        *ecx = 0;
+        __cpuid(eax, ebx, ecx, edx);
+}
+
+/* Some CPUID calls want 'count' to be placed in ecx */
+static inline void cpuid_count(unsigned int op, int count,
+                               unsigned int *eax, unsigned int *ebx,
+                               unsigned int *ecx, unsigned int *edx)
+{
+        *eax = op;
+        *ecx = count;
+        __cpuid(eax, ebx, ecx, edx);
+}
+
+/*
+ * CPUID functions returning a single datum
+ */
+static inline unsigned int cpuid_eax(unsigned int op)
+{
+        unsigned int eax, ebx, ecx, edx;
+
+        cpuid(op, &eax, &ebx, &ecx, &edx);
+        return eax;
+}
+static inline unsigned int cpuid_ebx(unsigned int op)
+{
+        unsigned int eax, ebx, ecx, edx;
+
+        cpuid(op, &eax, &ebx, &ecx, &edx);
+        return ebx;
+}
+static inline unsigned int cpuid_ecx(unsigned int op)
+{
+        unsigned int eax, ebx, ecx, edx;
+
+        cpuid(op, &eax, &ebx, &ecx, &edx);
+        return ecx;
+}
+static inline unsigned int cpuid_edx(unsigned int op)
+{
+        unsigned int eax, ebx, ecx, edx;
+
+        cpuid(op, &eax, &ebx, &ecx, &edx);
+        return edx;
+}
+
+#endif
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index 6846cc346400..0d83da198127 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -133,18 +133,6 @@ extern void detect_ht(struct cpuinfo_x86 *c);
 static inline void detect_ht(struct cpuinfo_x86 *c) {}
 #endif
 
-static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
-                                         unsigned int *ecx, unsigned int *edx)
-{
-        /* ecx is often an input as well as an output. */
-        __asm__("cpuid"
-                : "=a" (*eax),
-                  "=b" (*ebx),
-                  "=c" (*ecx),
-                  "=d" (*edx)
-                : "0" (*eax), "2" (*ecx));
-}
-
 #define load_cr3(pgdir) write_cr3(__pa(pgdir))
 
 /*
@@ -580,7 +568,6 @@ static inline void native_set_iopl_mask(unsigned mask)
 #include <asm/paravirt.h>
 #else
 #define paravirt_enabled() 0
-#define __cpuid native_cpuid
 
 static inline void load_sp0(struct tss_struct *tss, struct thread_struct *thread)
 {
@@ -598,62 +585,6 @@ static inline void load_sp0(struct tss_struct *tss, struct thread_struct *thread
 #define set_iopl_mask native_set_iopl_mask
 #endif /* CONFIG_PARAVIRT */
 
-/*
- * Generic CPUID function
- * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
- * resulting in stale register contents being returned.
- */
-static inline void cpuid(unsigned int op,
-                         unsigned int *eax, unsigned int *ebx,
-                         unsigned int *ecx, unsigned int *edx)
-{
-        *eax = op;
-        *ecx = 0;
-        __cpuid(eax, ebx, ecx, edx);
-}
-
-/* Some CPUID calls want 'count' to be placed in ecx */
-static inline void cpuid_count(unsigned int op, int count,
-                               unsigned int *eax, unsigned int *ebx,
-                               unsigned int *ecx, unsigned int *edx)
-{
-        *eax = op;
-        *ecx = count;
-        __cpuid(eax, ebx, ecx, edx);
-}
-
-/*
- * CPUID functions returning a single datum
- */
-static inline unsigned int cpuid_eax(unsigned int op)
-{
-        unsigned int eax, ebx, ecx, edx;
-
-        cpuid(op, &eax, &ebx, &ecx, &edx);
-        return eax;
-}
-static inline unsigned int cpuid_ebx(unsigned int op)
-{
-        unsigned int eax, ebx, ecx, edx;
-
-        cpuid(op, &eax, &ebx, &ecx, &edx);
-        return ebx;
-}
-static inline unsigned int cpuid_ecx(unsigned int op)
-{
-        unsigned int eax, ebx, ecx, edx;
-
-        cpuid(op, &eax, &ebx, &ecx, &edx);
-        return ecx;
-}
-static inline unsigned int cpuid_edx(unsigned int op)
-{
-        unsigned int eax, ebx, ecx, edx;
-
-        cpuid(op, &eax, &ebx, &ecx, &edx);
-        return edx;
-}
-
 /* generic versions from gas */
 #define GENERIC_NOP1    ".byte 0x90\n"
 #define GENERIC_NOP2            ".byte 0x89,0xf6\n"