linux-kernel - Re: [PATCH -tip] x86: move vmware to hypervisor

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Message-ID: <49CA33B8.5050503@rtr.ca>
Date:	Wed, 25 Mar 2009 09:38:00 -0400
From:	Mark Lord <lkml@....ca>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, akataria@...are.com
Subject: Re: [PATCH -tip] x86: move vmware to hypervisor

Jaswinder Singh Rajput wrote:
> On Tue, 2009-03-17 at 08:50 -0700, H. Peter Anvin wrote:
>> Jaswinder Singh Rajput wrote:
>>>> I dont really like this one. KVM is a hypervisor too, and so is 
>>>> Xen and lguest. VMware is one of the many types of a 
>>>> hypervisors.
>>> Can we use common hypervisor for Xen, lguest, vmware, etc.
>>> And Xen, lguest, vmware will be the sub-options.
>> Obviously.  We spent a lot of time breaking up the cpu stuff into common
>> and vendor-specific portions, we shouldn't go backwards w.r.t. hypervisors.
>> 	
> 
> OK, agreed.
> 
> But atleast give freedom to users to disable this who are not willing to
> use it.
> 
> Currently hypervisor is used only used by VMWARE, so is I prepare this
> freedom patch:
> 
> From: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> Date: Wed, 25 Mar 2009 10:40:01 +0530
> Subject: [PATCH] x86: Introduce CONFIG_X86_VMWARE option
> 
> Impact: freedom to choose
> 
> Gives freedom to users to select or suppress CONFIG_X86_VMWARE option.
> 
> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> ---
>  arch/x86/Kconfig                  |    7 +++++++
>  arch/x86/include/asm/hypervisor.h |    9 +++++++++
>  arch/x86/kernel/cpu/Makefile      |    2 +-
>  3 files changed, 17 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index f5d7d29..56e1a9c 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -554,6 +554,13 @@ config HPET_EMULATE_RTC
>  	def_bool y
>  	depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
>  
> +config X86_VMWARE
> +	bool
> +	default n
> +	prompt "X86 VMware support"
> +	---help---
> +	 Enable X86 VMware Hypervisor support.
>
..


Could that perhaps be clarified somewhat, changing the prompt
string to either "X86 VMware host support"
or "X86 VMware guest support", to remove any confusion ?

thanks
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