Re: [Xen-devel] [PATCH for-4.11] x86/spec_ctrl: Updates to retpoline-safety decision making

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> diff --git a/xen/arch/x86/spec_ctrl.c b/xen/arch/x86/spec_ctrl.c
> index 5b5ec90..aff06f0 100644
> --- a/xen/arch/x86/spec_ctrl.c
> +++ b/xen/arch/x86/spec_ctrl.c
> @@ -113,12 +113,13 @@ static void __init print_details(enum ind_thunk thunk)
>      printk(XENLOG_DEBUG "Speculative mitigation facilities:\n");
>  
>      /* Hardware features which pertain to speculative mitigations. */
> -    printk(XENLOG_DEBUG "  Hardware features:%s%s%s%s%s\n",
> +    printk(XENLOG_DEBUG "  Hardware features:%s%s%s%s%s%s\n",
>             (_7d0 & cpufeat_mask(X86_FEATURE_IBRSB)) ? " IBRS/IBPB" : "",
>             (_7d0 & cpufeat_mask(X86_FEATURE_STIBP)) ? " STIBP"     : "",
>             (e8b  & cpufeat_mask(X86_FEATURE_IBPB))  ? " IBPB"      : "",
>             (caps & ARCH_CAPABILITIES_IBRS_ALL)      ? " IBRS_ALL"  : "",
> -           (caps & ARCH_CAPABILITIES_RDCL_NO)       ? " RDCL_NO"   : "");
> +           (caps & ARCH_CAPABILITIES_RDCL_NO)       ? " RDCL_NO"   : "",
> +           (caps & ARCH_CAPS_RSBA)                  ? " RBSA"      : "");

You have RSBA on the left and RBSA on the right. Which one is it?

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