• Paul Mackerras's avatar
    KVM: PPC: Load/save FP/VMX/VSX state directly to/from vcpu struct · 99dae3ba
    Paul Mackerras authored
    Now that we have the vcpu floating-point and vector state stored in
    the same type of struct as the main kernel uses, we can load that
    state directly from the vcpu struct instead of having extra copies
    to/from the thread_struct.  Similarly, when the guest state needs to
    be saved, we can have it saved it directly to the vcpu struct by
    setting the current->thread.fp_save_area and current->thread.vr_save_area
    pointers.  That also means that we don't need to back up and restore
    userspace's FP/vector state.  This all makes the code simpler and
    faster.
    
    Note that it's not necessary to save or modify current->thread.fpexc_mode,
    since nothing in KVM uses or is affected by its value.  Nor is it
    necessary to touch used_vr or used_vsr.
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
    99dae3ba
book3s_pr.c 38.6 KB