x86: separate cmpxchg8b checking from PAE checking
PATCH 1/1 x86: separate cmpxchg8b checking from PAE checking
.. allowing the former to be use in non-PAE kernels, too.
Signed-off-by Jan Beulich <[email protected]>
--- arch/x86/Kconfig.cpu | 4 ++++ include/asm-x86/required-features.h | 6 +++++- 2 files changed, 9 insertions(+), 1 deletion(-)
arch/x86/Kconfig.cpu +4 -0
@@ -394,6 +394,10 @@ 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 +config X86_CMPXCHG64 + def_bool y + depends on X86_PAE || X86_64 + # this should be set for all -march=.. options where the compiler # generates cmov. config X86_CMOV
include/asm-x86/required-features.h +5 -1
@@ -19,9 +19,13 @@#if defined(CONFIG_X86_PAE ) || defined(CONFIG_X86_64 )# define NEED_PAE (1<<(X86_FEATURE_PAE & 31)) -# define NEED_CX8 (1<<(X86_FEATURE_CX8 & 31))#else # define NEED_PAE 0 +#endif + +#ifdef CONFIG_X86_CMPXCHG64 +# define NEED_CX8 (1<<(X86_FEATURE_CX8 & 31)) +#else # define NEED_CX8 0#endif