required-features.h

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#ifndef _ASM_X86_REQUIRED_FEATURES_H
#define _ASM_X86_REQUIRED_FEATURES_H

/* Define minimum CPUID feature set for kernel These bits are checked
   really early to actually display a visible error message before the
   kernel dies.  Make sure to assign features to the proper mask!

   Some requirements that are not in CPUID yet are also in the
   CONFIG_X86_MINIMUM_CPU_FAMILY which is checked too.

   The real information is in arch/x86/Kconfig.cpu, this just converts
   the CONFIGs into a bitmask */

#ifndef CONFIG_MATH_EMULATION
# define NEED_FPU   (1<<(X86_FEATURE_FPU & 31))
#else
# define NEED_FPU   0
#endif

#if defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
# define NEED_PAE   (1<<(X86_FEATURE_PAE & 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

#if defined(CONFIG_X86_CMOV) || defined(CONFIG_X86_64)
# define NEED_CMOV  (1<<(X86_FEATURE_CMOV & 31))
#else
# define NEED_CMOV  0
#endif

#ifdef CONFIG_X86_USE_3DNOW
# define NEED_3DNOW (1<<(X86_FEATURE_3DNOW & 31))
#else
# define NEED_3DNOW 0
#endif

#if defined(CONFIG_X86_P6_NOP) || defined(CONFIG_X86_64)
# define NEED_NOPL  (1<<(X86_FEATURE_NOPL & 31))
#else
# define NEED_NOPL  0
#endif

#ifdef CONFIG_X86_64
#ifdef CONFIG_PARAVIRT
/* Paravirtualized systems may not have PSE or PGE available */
#define NEED_PSE    0
#define NEED_PGE    0
#else
#define NEED_PSE    (1<<(X86_FEATURE_PSE) & 31)
#define NEED_PGE    (1<<(X86_FEATURE_PGE) & 31)
#endif
#define NEED_MSR    (1<<(X86_FEATURE_MSR & 31))
#define NEED_FXSR   (1<<(X86_FEATURE_FXSR & 31))
#define NEED_XMM    (1<<(X86_FEATURE_XMM & 31))
#define NEED_XMM2   (1<<(X86_FEATURE_XMM2 & 31))
#define NEED_LM     (1<<(X86_FEATURE_LM & 31))
#else
#define NEED_PSE    0
#define NEED_MSR    0
#define NEED_PGE    0
#define NEED_FXSR   0
#define NEED_XMM    0
#define NEED_XMM2   0
#define NEED_LM     0
#endif

#define REQUIRED_MASK0  (NEED_FPU|NEED_PSE|NEED_MSR|NEED_PAE|\
             NEED_CX8|NEED_PGE|NEED_FXSR|NEED_CMOV|\
             NEED_XMM|NEED_XMM2)
#define SSE_MASK    (NEED_XMM|NEED_XMM2)

#define REQUIRED_MASK1  (NEED_LM|NEED_3DNOW)

#define REQUIRED_MASK2  0
#define REQUIRED_MASK3  (NEED_NOPL)
#define REQUIRED_MASK4  0
#define REQUIRED_MASK5  0
#define REQUIRED_MASK6  0
#define REQUIRED_MASK7  0
#define REQUIRED_MASK8  0
#define REQUIRED_MASK9  0

#endif /* _ASM_X86_REQUIRED_FEATURES_H */