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SubjectRe: [PATCH] x86: prevent unconditional writes to DebugCtl MSR

* Jan Beulich <> wrote:

> Otherwise, enabling (or better, subsequent disabling) of single
> stepping would cause a kernel oops on CPUs not having this MSR.
> The patch could have been added a conditional to the MSR write in
> user_disable_single_step(), but centralizing the updates seems safer
> and (looking forward) better manageable.

thanks Jan, applied.


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