• Dave Hansen's avatar
    x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated · 1e61f78b
    Dave Hansen authored
    x86 has two macros which allow us to evaluate some CPUID-based
    features at compile time:
    
    	REQUIRED_MASK_BIT_SET()
    	DISABLED_MASK_BIT_SET()
    
    They're both defined by having the compiler check the bit
    argument against some constant masks of features.
    
    But, when adding new CPUID leaves, we need to check new words
    for these macros.  So make sure that those macros and the
    REQUIRED_MASK* and DISABLED_MASK* get updated when necessary.
    
    This looks kinda silly to have an open-coded value ("18" in
    this case) open-coded in 5 places in the code.  But, we really do
    need 5 places updated when NCAPINTS gets bumped, so now we just
    force the issue.
    Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Dave Hansen <dave@sr71.net>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Link: http://lkml.kernel.org/r/20160629200108.92466F6F@viggo.jf.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    1e61f78b
required-features.h 2.67 KB