• Vitaly Kuznetsov's avatar
    KVM: x86: extend struct kvm_vcpu_pv_apf_data with token info · 68fd66f1
    Vitaly Kuznetsov authored
    
    
    Currently, APF mechanism relies on the #PF abuse where the token is being
    passed through CR2. If we switch to using interrupts to deliver page-ready
    notifications we need a different way to pass the data. Extent the existing
    'struct kvm_vcpu_pv_apf_data' with token information for page-ready
    notifications.
    
    While on it, rename 'reason' to 'flags'. This doesn't change the semantics
    as we only have reasons '1' and '2' and these can be treated as bit flags
    but KVM_PV_REASON_PAGE_READY is going away with interrupt based delivery
    making 'reason' name misleading.
    
    The newly introduced apf_put_user_ready() temporary puts both flags and
    token information, this will be changed to put token only when we switch
    to interrupt based notifications.
    Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
    Message-Id: <20200525144125.143875-3-vkuznets@redhat.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    68fd66f1
mmu.c 169 KB