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Bank 4 MCEs are logged and reported only on the node base core (NBC) in a socket. Refer to the D18F3x44[NbMcaToMstCpuEn] field in Fam10h and later BKDGs. The node base core (NBC) is the lowest numbered core in the node. This patch ensures that we inject the error on the NBC for bank 4 errors. Otherwise, triggering #MC or APIC interrupts on a core which is not the NBC would not have any effect on the system, i.e. we would not see any relevant output on kernel logs for the error we just injected. Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> [ Cleanup comments. ] [ Add a missing dependency on AMD_NB caught by Randy Dunlap. ] Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Randy Dunlap <rdunlap@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> 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> Link: http://lkml.kernel.org/r/1443190851-2172-4-git-send-email-Aravind.Gopalakrishnan@amd.com Link: http://lkml.kernel.org/r/1444641762-9437-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 lines
330 B
Plaintext
10 lines
330 B
Plaintext
config AMD_MCE_INJ
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tristate "Simple MCE injection interface for AMD processors"
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depends on RAS && EDAC_DECODE_MCE && DEBUG_FS && AMD_NB
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default n
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help
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This is a simple debugfs interface to inject MCEs and test different
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aspects of the MCE handling code.
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WARNING: Do not even assume this interface is staying stable!
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