• Sean Christopherson's avatar
    KVM: x86: Remove emulation_result enums, EMULATE_{DONE,FAIL,USER_EXIT} · 60fc3d02
    Sean Christopherson authored
    Deferring emulation failure handling (in some cases) to the caller of
    x86_emulate_instruction() has proven fragile, e.g. multiple instances of
    KVM not setting run->exit_reason on EMULATE_FAIL, largely due to it
    being difficult to discern what emulation types can return what result,
    and which combination of types and results are handled where.
    
    Now that x86_emulate_instruction() always handles emulation failure,
    i.e. EMULATION_FAIL is only referenced in callers, remove the
    emulation_result enums entirely.  Per KVM's existing exit handling
    conventions, return '0' and '1' for "exit to userspace" and "resume
    guest" respectively.  Doing so cleans up many callers, e.g. they can
    return kvm_emulate_instruction() directly instead of having to interpret
    its result.
    Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    60fc3d02
kvm_host.h 46.7 KB