KVM: x86: simplify kvm_mwait_in_guest()

Web:        https://git.kernel.org/torvalds/c/431f5d4443964bcc58ac2e4c6fd8ace6dcd3a8d1
Commit:     431f5d4443964bcc58ac2e4c6fd8ace6dcd3a8d1
Parent:     346f48fa311ceee7478b5b810ba050a4a22e0b2e
Refname:    refs/heads/master
Author:     Radim Krčmář <[email protected]>
AuthorDate: Wed Nov 29 22:23:43 2017 +0100
Committer:  Paolo Bonzini <[email protected]>
CommitDate: Thu Dec 14 09:26:43 2017 +0100

    KVM: x86: simplify kvm_mwait_in_guest()
    
    If Intel/AMD implements MWAIT, we expect that it works well and only
    reject known bugs;  no reason to do it the other way around for minor
    vendors.  (Not that they are relevant ATM.)
    
    This allows further simplification of kvm_mwait_in_guest().
    And use boot_cpu_has() instead of "cpu_has(&boot_cpu_data," while at it.
    
    Reviewed-by: Alexander Graf <[email protected]>
    Acked-by: Borislav Petkov <[email protected]>
    Acked-by: Michael S. Tsirkin <[email protected]>
    Signed-off-by: Radim Krčmář <[email protected]>
    Signed-off-by: Paolo Bonzini <[email protected]>
---
 arch/x86/kvm/x86.h | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index d15859ec5e92..c69f973111cb 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -265,18 +265,8 @@ static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
 
 static inline bool kvm_mwait_in_guest(void)
 {
-	if (!cpu_has(&boot_cpu_data, X86_FEATURE_MWAIT))
-		return false;