• Paolo Bonzini's avatar
    x86/cpufeature: Move processor tracing out of scattered features · 4fdec203
    Paolo Bonzini authored
    Processor tracing is already enumerated in word 9 (CPUID[7,0].EBX),
    so do not duplicate it in the scattered features word.
    
    Besides being more tidy, this will be useful for KVM when it presents
    processor tracing to the guests.  KVM selects host features that are
    supported by both the host kernel (depending on command line options,
    CPU errata, or whatever) and KVM.  Whenever a full feature word exists,
    KVM's code is written in the expectation that the CPUID bit number
    matches the X86_FEATURE_* bit number, but this is not the case for
    X86_FEATURE_INTEL_PT.
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Luwei Kang <luwei.kang@intel.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Radim Krčmář <rkrcmar@redhat.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: kvm@vger.kernel.org
    Link: http://lkml.kernel.org/r/1516117345-34561-1-git-send-email-pbonzini@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    4fdec203
cpufeatures.h 20.9 KB