Re: [Xen-devel] [PATCH] x86: invpcid support

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Mar 02, 2018 at 02:47:13PM +0000, Wei Liu wrote:
> Provide the functions needed for different modes. And cpu_has_invpcid.
> 
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> ---
> This is useful for Juergen's XPTI improvement series.
> 
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Juergen Gross <jgross@xxxxxxxx>
> ---
>  xen/arch/x86/Rules.mk            |  1 +
>  xen/include/asm-x86/cpufeature.h |  1 +
>  xen/include/asm-x86/invpcid.h    | 75 
> ++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 77 insertions(+)
>  create mode 100644 xen/include/asm-x86/invpcid.h
> 
> diff --git a/xen/arch/x86/Rules.mk b/xen/arch/x86/Rules.mk
> index 9897deaab9..c941059f42 100644
> --- a/xen/arch/x86/Rules.mk
> +++ b/xen/arch/x86/Rules.mk
> @@ -23,6 +23,7 @@ $(call as-option-add,CFLAGS,CC,"rdseed 
> %eax",-DHAVE_GAS_RDSEED)
>  $(call as-option-add,CFLAGS,CC,".equ \"x\"$$(comma)1", \
>                       -U__OBJECT_LABEL__ -DHAVE_GAS_QUOTED_SYM \
>                       '-D__OBJECT_LABEL__=$(subst 
> $(BASEDIR)/,,$(CURDIR))/$$@')
> +$(call as-insn-check,CFLAGS,CC,"invpcid 
> (%rax)$$(comma)%rax",-DHAVE_GAS_INVPCID)

Ah, and this also needs to be replaced with as-option-add.

Wei.

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