• Eric W. Biederman's avatar
    [PATCH] kexec: x86 shutdown APICs during crash_shutdown · 63d30298
    Eric W. Biederman authored
    In the case of a crash/panic an architecture specific function
    machine_crash_shutdown is called.  This patch adds to the x86 machine_crash
    function the standard kernel code for shutting down apics.
    
    Every line of code added to that function increases the risk that we will call
    code after a kernel panic that is not safe.
    
    This patch should not make it to the stable kernel without a being reviewed a
    lot more.  It is unclear how much a hardned kernel can take when it comes to
    misconfigured apics.  So since a normal kernel has problems this patch does a
    clean shutdown.
    
    It is my expectation this patch will be dropped from future generations of the
    kexec work.  But for the moment it is a crutch to keep from breaking
    everything.
    Signed-off-by: default avatarEric Biederman <ebiederm@xmission.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    63d30298
crash.c 4.68 KB