x86: require family >= 6 if we are using P6 NOPs

The P6 family of NOPs are only available on family >= 6 or above, so
enforce that in the boot code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 6 insertions, 3 deletions

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index e09a6b73a1aa..86fd2a0e4597 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -377,6 +377,10 @@ config X86_OOSTORE
         def_bool y
         depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
 
+config X86_P6_NOP
+        def_bool y
+        depends on (M686 || MPENTIUMII || MPENTIUMIII || MPENTIUMM || MCORE2 || PENTIUM4)
+
 config X86_TSC
         def_bool y
         depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
@@ -390,6 +394,7 @@ config X86_CMOV
 config X86_MINIMUM_CPU_FAMILY
         int
         default "64" if X86_64
+        default "6" if X86_32 && X86_P6_NOP
         default "4" if X86_32 && (X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK)
         default "3"
 
diff --git a/include/asm-x86/nops.h b/include/asm-x86/nops.h
index fec025c7f58c..c52b334b8166 100644
--- a/include/asm-x86/nops.h
+++ b/include/asm-x86/nops.h
@@ -63,9 +63,7 @@
 #define ASM_NOP6 K7_NOP6
 #define ASM_NOP7 K7_NOP7
 #define ASM_NOP8 K7_NOP8
-#elif defined(CONFIG_M686) || defined(CONFIG_MPENTIUMII) || \
-      defined(CONFIG_MPENTIUMIII) || defined(CONFIG_MPENTIUMM) || \
-      defined(CONFIG_MCORE2) || defined(CONFIG_PENTIUM4)
+#elif defined(CONFIG_X86_P6_NOP)
 #define ASM_NOP1 P6_NOP1
 #define ASM_NOP2 P6_NOP2
 #define ASM_NOP3 P6_NOP3