Messages in this thread | | | Date | Tue, 2 Aug 2022 12:51:59 +0200 | From | Ingo Molnar <> | Subject | Re: [RESEND] x86/bus_lock: Don't assume the init value of DEBUGCTLMSR.BUS_LOCK_DETECT to be zero |
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* Chenyi Qiang <chenyi.qiang@intel.com> wrote:
> It's possible that BIOS/firmware has set DEBUGCTLMSR_BUS_LOCK_DETECT, or > this kernel has been kexec'd from a kernel that enabled bus lock > detection. > > Disable bus lock detection explicitly if not wanted.
Makes sense.
Just curious: in what circumstances does the BIOS/firmware set DEBUGCTLMSR_BUS_LOCK_DETECT? Does it use it, or does it enable it for some spurious reason, without really using the feature? (Assuming you are aware of instances where this happened - or was this simply a hypothetical?)
Thanks,
Ingo
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