linux-kernel - Re: [tip:x86/urgent] x86/kconfig: Add a Kconfig shortcut for building working KVM guest kernels

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Date:	Wed, 1 May 2013 14:00:06 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Borislav Petkov <bp@...en8.de>
cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, Pekka Enberg <penberg@...nel.org>,
	levinsasha928@...il.com, mtosatti@...hat.com, tglx@...utronix.de,
	Borislav Petkov <bp@...e.de>, fengguang.wu@...el.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86/kconfig:  Add a Kconfig shortcut for building
 working KVM guest kernels

On Wed, 1 May 2013, Borislav Petkov wrote:

> ---
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index e8fff2f4ecb7..4f8ef85b0633 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -389,7 +389,8 @@ config X86_VSMP
>  	bool "ScaleMP vSMP"
>  	select HYPERVISOR_GUEST
>  	select PARAVIRT
> -	depends on X86_64 && PCI
> +	select PCI
> +	depends on X86_64
>  	depends on X86_EXTENDED_PLATFORM
>  	depends on SMP
>  	---help---
> @@ -664,6 +665,7 @@ config KVM_GUEST_COMMON_OPTIONS
>  	select IP_PNP
>  	select IP_PNP_DHCP
>  	select BINFMT_ELF
> +	select PCI
>  	select PCI_MSI
>  	select HAVE_ARCH_KGDB
>  	select DEBUG_KERNEL

With this applied, two other types of conflicting dependencies:

warning: (KVM_GUEST_COMMON_OPTIONS) selects VIRTIO_NET which has unmet direct dependencies (NETDEVICES && NET_CORE && VIRTIO)

and

warning: (KVM_GUEST_COMMON_OPTIONS && AMD_IOMMU) selects PCI_MSI which has unmet direct dependencies (PCI && ARCH_SUPPORTS_MSI)
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