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Re: [XEN PATCH v1] x86/intel: optional build of TSX support


  • To: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Mon, 10 Jun 2024 17:48:08 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 10 Jun 2024 15:48:14 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 06.06.2024 13:04, Sergiy Kibrik wrote:
> --- a/xen/arch/x86/spec_ctrl.c
> +++ b/xen/arch/x86/spec_ctrl.c
> @@ -116,8 +116,10 @@ static int __init cf_check parse_spec_ctrl(const char *s)
>              if ( opt_pv_l1tf_domu < 0 )
>                  opt_pv_l1tf_domu = 0;
>  
> +#ifdef CONFIG_INTEL
>              if ( opt_tsx == -1 )
>                  opt_tsx = -3;
> +#endif

Personally I prefer using the direct check in such cases, rather one on
a prereq symbol. I.e. "#ifndef opt_tsx" both here and below. Other
maintainers may have a different view, though, so I won't insist unless
at least one of them shares this perspective with me. Other than this:
Looks largely okay to me.

Jan



 


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