linux-kernel - Re: [PATCH] make KVM selectable again

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Date:	Sun, 10 Feb 2008 17:08:35 +0530
From:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>
To:	"Dave Hansen" <haveblue@...ibm.com>
Cc:	"Avi Kivity" <avi@...o.co.il>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kvm-devel <kvm-devel@...ts.sourceforge.net>,
	"Sam Ravnborg" <sam@...nborg.org>
Subject: Re: [PATCH] make KVM selectable again

On Feb 10, 2008 2:29 AM, Dave Hansen <haveblue@...ibm.com> wrote:
> Current git for me (b1d0e4f535e10775cffde922208b49629169aeaa) doesn't
> let me build KVM.  In fact, I don't seem to have *ANY* kvm-related
> symbols in my .config at all.
>
> I've verified that arch/x86/kvm/Kconfig was getting run by putting some
> comments in it.  It seems to me like just putting:
>
>         config HAVE_KVM
>                bool
>
> isn't letting anything come into my .config at all.  I'm not sure why we
> do that, and then have:
>
>         select HAVE_KVM
>
> in arch/x86/Kconfig.
>
> This patch just defines HAVE_KVM in the x86 Kconfig and is done with it.
> Seems to work for me.
>
> Was there some reason that it was done this way?  Was it ever tested?
>
> -- Dave
>
> Signed-off-by: Dave Hansen <haveblue@...ibm.com>
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 65a70b7..cbbf35d 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -115,7 +115,8 @@ config ARCH_HAS_CPU_RELAX
>  config HAVE_SETUP_PER_CPU_AREA
>         def_bool X86_64
>
> -select HAVE_KVM
> +config HAVE_KVM
> +       def_bool y
>
>  config ARCH_HIBERNATION_POSSIBLE
>         def_bool y
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index 41962e7..f2177ec 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -1,8 +1,6 @@
>  #
>  # KVM configuration
>  #
> -config HAVE_KVM
> -       bool
>
>  menuconfig VIRTUALIZATION
>         bool "Virtualization"
>

Hi, Dave,

I did not see your email, until just now. I've posted a patch at
http://lkml.org/lkml/2008/2/10/26. Avi has acked it

Balbir
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