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Re: [Xen-devel] [PATCH v2] x86/CPUID: don't override tool stack decision to hide STIBP


  • To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Juergen Gross <jgross@xxxxxxxx>
  • Date: Tue, 29 May 2018 12:15:04 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Delivery-date: Tue, 29 May 2018 10:15:13 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 28/05/18 09:08, Jan Beulich wrote:
> Other than in the feature sets, where we indeed want to offer the
> feature even if not enumerated on hardware, we shouldn't dictate the
> feature being available if tool stack or host admin have decided to not
> expose it (for whatever [questionable?] reason). That feature set side
> override is sufficient to achieve the intended guest side safety
> property (in offering - by default - STIBP independent of actual
> availability in hardware).
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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