linux-kernel - Re: [PATCH] kvm: powerpc: Fix ppc64_defconfig + PPC

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Message-ID: <553877FB.4040507@linux.vnet.ibm.com>
Date:	Thu, 23 Apr 2015 10:11:31 +0530
From:	Shreyas B Prabhu <shreyas@...ux.vnet.ibm.com>
To:	mpe@...erman.id.au, agraf@...e.de
CC:	ego@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] kvm: powerpc: Fix ppc64_defconfig + PPC_POWERNV=n build
 error

Any suggestions on this?

On Thursday 16 April 2015 04:28 PM, Shreyas B. Prabhu wrote:
> kvm_no_guest function calls power7_wakeup_loss to put the thread into
> the deepest supported idle state. power7_wakeup_loss is defined in
> arch/powerpc/kernel/idle_power7.S, which is compiled only when PPC_P7_NAP=y.
> And PPC_P7_NAP is selected when PPC_POWERNV=y.
> Hence in cases where PPC_POWERNV=n and KVM_BOOK3S_64_HV=y we see the
> following error:
> 
> arch/powerpc/kvm/built-in.o: In function `kvm_no_guest':
> arch/powerpc/kvm/book3s_hv_rmhandlers.o:(.text+0x42c): undefined reference to `power7_wakeup_loss'
> 
> Fix this by adding PPC_POWERNV as a dependency for KVM_BOOK3S_64_HV.
> 
> Signed-off-by: Shreyas B. Prabhu <shreyas@...ux.vnet.ibm.com>
> ---
>  arch/powerpc/kvm/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
> index 11850f3..b3b3d9f 100644
> --- a/arch/powerpc/kvm/Kconfig
> +++ b/arch/powerpc/kvm/Kconfig
> @@ -75,7 +75,7 @@ config KVM_BOOK3S_64
> 
>  config KVM_BOOK3S_64_HV
>  	tristate "KVM support for POWER7 and PPC970 using hypervisor mode in host"
> -	depends on KVM_BOOK3S_64
> +	depends on KVM_BOOK3S_64 && PPC_POWERNV
>  	select KVM_BOOK3S_HV_POSSIBLE
>  	select MMU_NOTIFIER
>  	select CMA
> 

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