linux-kernel - Re: [PATCH RFC 6/6] arm64/xen: introduce CONFIG

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Message-ID: <20130531110225.GD18045@localhost.cambridge.arm.com>
Date:	Fri, 31 May 2013 12:02:26 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Will Deacon <Will.Deacon@....com>,
	"Ian.Campbell@...rix.com" <Ian.Campbell@...rix.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>
Subject: Re: [PATCH RFC 6/6] arm64/xen: introduce CONFIG_XEN and hypercall.S
 on ARM64

On Thu, May 30, 2013 at 05:18:33PM +0100, Stefano Stabellini wrote:
> Introduce CONFIG_XEN and the implementation of hypercall.S (that is
> the only ARMv8 specific code in Xen support for ARM).
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> ---
>  arch/arm64/Kconfig         |   11 +++++
>  arch/arm64/Makefile        |    1 +
>  arch/arm64/xen/Makefile    |    1 +
>  arch/arm64/xen/hypercall.S |  105 ++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 118 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm64/xen/Makefile
>  create mode 100644 arch/arm64/xen/hypercall.S
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 56b3f6d..f35751f 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -182,6 +182,17 @@ config HW_PERF_EVENTS
>  
>  source "mm/Kconfig"
>  
> +config XEN_DOM0
> +	def_bool y
> +	depends on XEN
> +
> +config XEN
> +	bool "Xen guest support on ARM64 (EXPERIMENTAL)"
> +	depends on ARM64 && OF
> +	depends on !GENERIC_ATOMIC64

I don't think we need this depends on !GENERIC_ATOMIC64, we don't enable
it on arm64.

-- 
Catalin
--
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