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

* Roland McGrath <roland@redhat.com> wrote:

> If TIF_DEBUGCTLMSR is ever set on a machine without the support, that
> is a bug we should diagnose earlier. If you want some paranoia, then
> keep update_debugctlmsr but make it do:
>
> BUG_ON(boot_cpu_data.x86 < 6);
>
> instead.

agreed. Jan, wanna send a fix for this?

Ingo


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