On Wed, Oct 23, 2019 at 07:16:22PM +0800, Zhenzhong Duan wrote: > There are cases where a guest tries to switch spinlocks to bare metal > behavior (e.g. by setting "xen_nopvspin" on XEN platform and > "hv_nopvspin" on HYPER_V). > > That feature is missed on KVM, add a new parameter "nopvspin" to disable > PV spinlocks for KVM guest. > > The new 'nopvspin' parameter will also replace Xen and Hyper-V specific > parameters in future patches. > > Define variable nopvsin as global because it will be used in future > patches as above. > > Signed-off-by: Zhenzhong Duan <[email protected]> > Reviewed-by: Vitaly Kuznetsov <[email protected]> > Cc: Jonathan Corbet <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Borislav Petkov <[email protected]> > Cc: "H. Peter Anvin" <[email protected]> > Cc: Paolo Bonzini <[email protected]> > Cc: Radim Krcmar <[email protected]> > Cc: Sean Christopherson <[email protected]> > Cc: Vitaly Kuznetsov <[email protected]> > Cc: Wanpeng Li <[email protected]> > Cc: Jim Mattson <[email protected]> > Cc: Joerg Roedel <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Will Deacon <[email protected]> > ---
Reviewed-by: Sean Christopherson <[email protected]>
