linux-kernel - Re: [tip:x86/cpu] x86: Clean up the hypervisor layer

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Date:	Sat, 8 May 2010 10:16:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	greg@...ah.com, hjanssen@...rosoft.com, ksrinivasan@...ell.com,
	tglx@...utronix.de, akataria@...are.com
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/cpu] x86: Clean up the hypervisor layer


* tip-bot for H. Peter Anvin <hpa@...or.com> wrote:

> Commit-ID:  e08cae4181af9483b04ecfac48f01c8e5a5f27bf
> Gitweb:     http://git.kernel.org/tip/e08cae4181af9483b04ecfac48f01c8e5a5f27bf
> Author:     H. Peter Anvin <hpa@...or.com>
> AuthorDate: Fri, 7 May 2010 16:57:28 -0700
> Committer:  H. Peter Anvin <hpa@...or.com>
> CommitDate: Fri, 7 May 2010 17:13:04 -0700
> 
> x86: Clean up the hypervisor layer
> 
> Clean up the hypervisor layer and the hypervisor drivers, using an ops
> structure instead of an enumeration with if statements.
> 
> The identity of the hypervisor, if needed, can be tested by testing
> the pointer value in x86_hyper.
> 
> The MS-HyperV private state is moved into a normal global variable
> (it's per-system state, not per-CPU state).  Being a normal bss
> variable, it will be left at all zero on non-HyperV platforms, and so
> can generally be tested for HyperV-specific features without
> additional qualification.
> 
> Signed-off-by: H. Peter Anvin <hpa@...or.com>
> Acked-by: Greg KH <greg@...ah.com>
> Cc: Hank Janssen <hjanssen@...rosoft.com>
> Cc: Alok Kataria <akataria@...are.com>
> Cc: Ky Srinivasan <ksrinivasan@...ell.com>
> LKML-Reference: <4BE49778.6060800@...or.com>
> ---
>  arch/x86/include/asm/hyperv.h     |    5 ++-
>  arch/x86/include/asm/hypervisor.h |   27 ++++++++++++++++-
>  arch/x86/include/asm/mshyperv.h   |   15 +++++++--
>  arch/x86/include/asm/processor.h  |    7 ----
>  arch/x86/include/asm/vmware.h     |   27 ------------------
>  arch/x86/kernel/cpu/hypervisor.c  |   56 ++++++++++++++++++++++--------------
>  arch/x86/kernel/cpu/mshyperv.c    |   51 ++++++++++++++++------------------
>  arch/x86/kernel/cpu/vmware.c      |   36 +++++++++++++----------
>  8 files changed, 117 insertions(+), 107 deletions(-)

Note, this patch breaks the build of the new vmware baloon driver:

  drivers/misc/vmware_balloon.c:44:24: error: asm/vmware.h: No such file or directory

CONFIG_VMWARE_BALLOON=y

Thanks,

	Ingo
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