• Wanpeng Li's avatar
    KVM: async_pf: Let guest support delivery of async_pf from guest mode · 52a5c155
    Wanpeng Li authored
    Adds another flag bit (bit 2) to MSR_KVM_ASYNC_PF_EN. If bit 2 is 1,
    async page faults are delivered to L1 as #PF vmexits; if bit 2 is 0,
    kvm_can_do_async_pf returns 0 if in guest mode.
    This is similar to what svm.c wanted to do all along, but it is only
    enabled for Linux as L1 hypervisor.  Foreign hypervisors must never
    receive async page faults as vmexits, because they'd probably be very
    confused about that.
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Radim Krčmář <rkrcmar@redhat.com>
    Signed-off-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
    Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
mmu.c 138 KB