linux-kernel - Re: [PATCH v3 2/8] KVM: arm64: Enable the KVM-VFIO device

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Date:	Sun, 30 Nov 2014 13:14:02 +0100
From:	Christoffer Dall <christoffer.dall@...aro.org>
To:	Eric Auger <eric.auger@...aro.org>
Cc:	eric.auger@...com, marc.zyngier@....com,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, alex.williamson@...hat.com,
	joel.schopp@....com, kim.phillips@...escale.com, paulus@...ba.org,
	gleb@...nel.org, pbonzini@...hat.com, agraf@...e.de,
	linux-kernel@...r.kernel.org, patches@...aro.org,
	will.deacon@....com, a.motakis@...tualopensystems.com,
	a.rigo@...tualopensystems.com, john.liuli@...wei.com,
	ming.lei@...onical.com, feng.wu@...el.com
Subject: Re: [PATCH v3 2/8] KVM: arm64: Enable the KVM-VFIO device

On Sun, Nov 23, 2014 at 07:35:54PM +0100, Eric Auger wrote:
> Used by KVM-enabled VFIO-based device passthrough support in QEMU.
> 
> Signed-off-by: Joel Schopp <joel.schopp@....com>
> Signed-off-by: Eric Auger <eric.auger@...aro.org>
> 
> ---
> 
> Extracted from [RFC PATCH] arm64: KVM: add irqfd support
> http://www.spinics.net/lists/kvm-arm/msg10798.html
> ---
>  arch/arm64/kvm/Kconfig  | 1 +
>  arch/arm64/kvm/Makefile | 2 +-
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
> index 09c25c2..2edf926 100644
> --- a/arch/arm64/kvm/Kconfig
> +++ b/arch/arm64/kvm/Kconfig
> @@ -26,6 +26,7 @@ config KVM
>  	select KVM_ARM_HOST
>  	select KVM_ARM_VGIC
>  	select KVM_ARM_TIMER
> +	select KVM_VFIO
>  	select HAVE_KVM_EVENTFD
>  	---help---
>  	  Support hosting virtualized guest machines.
> diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile
> index 2e6b827..81ed091 100644
> --- a/arch/arm64/kvm/Makefile
> +++ b/arch/arm64/kvm/Makefile
> @@ -11,7 +11,7 @@ ARM=../../../arch/arm/kvm
>  
>  obj-$(CONFIG_KVM_ARM_HOST) += kvm.o
>  
> -kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o
> +kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o $(KVM)/vfio.o
>  kvm-$(CONFIG_KVM_ARM_HOST) += $(ARM)/arm.o $(ARM)/mmu.o $(ARM)/mmio.o
>  kvm-$(CONFIG_KVM_ARM_HOST) += $(ARM)/psci.o $(ARM)/perf.o
>  
> -- 
> 1.9.1
> 

Should these patches not be squashed into one?

Also, what do they enable at this point?  Should they be queued by the
end of the series instead?

-Christoffer
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