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    x86/ras: Flip the TSC-adding logic · 669c00f0
    Borislav Petkov 提交于
    Add the TSC value to the MCE record only when the MCE being logged is
    precise, i.e., it is logged as an exception or an MCE-related interrupt.
    
    So it doesn't look particularly easy to do without touching/changing a
    bunch of places. That's why I'm trying tricks first.
    
    For example, the mce-apei.c case I'm addressing by setting ->tsc only
    for errors of panic severity. The idea there is, that, panic errors will
    have raised an #MC and not polled.
    
    And then instead of propagating a flag to mce_setup(), it seems
    easier/less code to set ->tsc depending on the call sites, i.e.,
    are we polling or are we preparing an MCE record in an exception
    handler/thresholding interrupt.
    Signed-off-by: NBorislav Petkov <bp@suse.de>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
    Cc: linux-edac <linux-edac@vger.kernel.org>
    Link: http://lkml.kernel.org/r/20170123183514.13356-5-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
    669c00f0
mce_amd.c 33.3 KB