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Re: [PATCH 1/4] x86: replace __ASM_{CL,ST}AC

  • To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Tue, 28 Jul 2020 14:55:01 +0100
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  • Cc: Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
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On 15/07/2020 11:48, Jan Beulich wrote:
> --- a/xen/arch/x86/arch.mk
> +++ b/xen/arch/x86/arch.mk
> @@ -20,6 +20,7 @@ $(call as-option-add,CFLAGS,CC,"rdrand %
>  $(call as-option-add,CFLAGS,CC,"rdfsbase %rax",-DHAVE_AS_FSGSBASE)
>  $(call as-option-add,CFLAGS,CC,"xsaveopt (%rax)",-DHAVE_AS_XSAVEOPT)
>  $(call as-option-add,CFLAGS,CC,"rdseed %eax",-DHAVE_AS_RDSEED)
> +$(call as-option-add,CFLAGS,CC,"clac",-DHAVE_AS_CLAC_STAC)

Kconfig please, rather than extending this legacy section.

That said, surely stac/clac support is old enough for us to start using

Could we see about sorting a reasonable minimum toolchain version,
before we churn all the logic to deal with obsolete toolchains?




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