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    MIPS: KVM: Handle TRAP exceptions from guest kernel · 0a560427
    James Hogan 提交于
    Trap instructions are used by Linux to implement BUG_ON(), however KVM
    doesn't pass trap exceptions on to the guest if they occur in guest
    kernel mode, instead triggering an internal error "Exception Code: 13,
    not yet handled". The guest kernel then doesn't get a chance to print
    the usual BUG message and stack trace.
    
    Implement handling of the trap exception so that it gets passed to the
    guest and the user is left with a more useful log message.
    Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Gleb Natapov <gleb@kernel.org>
    Cc: kvm@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    0a560427
trap_emul.c 15.2 KB