In do_machine_check function, we can find the following code segment:
* ...
* /* mce_clear_state will clear *final, save locally for use later */
* m = *final;
*
* if (!no_way_out)
* mce_clear_state(toclear);
* ...
But the reality is that mce_clear_state function will not clear *final. It is
just
used to clear bank MSRs or the relative field of injectm used by MCE-Injection.
Meanwhile, mce_reign executed by monarch CPU will clear *final, therefore we
need
to save it locally for use later.
Signed-off-by: Chen Yucong <sla...@gmail.com>
---
arch/x86/kernel/cpu/mcheck/mce.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 68317c8..83159c1 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1137,7 +1137,9 @@ void do_machine_check(struct pt_regs *regs, long
error_code)
}
}
- /* mce_clear_state will clear *final, save locally for use later */
+ /* mce_reign executed by monarch CPU will clear *final(mces_seen),
+ * save locally for use later
+ */
m = *final;
if (!no_way_out)
--
1.7.10.4
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