linux-kernel - Re: [RFC v5 00/17] KVM PCIe/MSI passthrough on ARM/ARM64

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Date:	Wed, 2 Mar 2016 13:30:11 +0100
From:	Eric Auger <eric.auger@...aro.org>
To:	"Jaggi, Manish" <Manish.Jaggi@...iumnetworks.com>,
	"eric.auger@...com" <eric.auger@...com>,
	"robin.murphy@....com" <robin.murphy@....com>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
	"will.deacon@....com" <will.deacon@....com>,
	"joro@...tes.org" <joro@...tes.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"jason@...edaemon.net" <jason@...edaemon.net>,
	"marc.zyngier@....com" <marc.zyngier@....com>,
	"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Cc:	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"patches@...aro.org" <patches@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Bharat.Bhushan@...escale.com" <Bharat.Bhushan@...escale.com>,
	"pranav.sawargaonkar@...il.com" <pranav.sawargaonkar@...il.com>,
	"p.fedin@...sung.com" <p.fedin@...sung.com>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>
Subject: Re: [RFC v5 00/17] KVM PCIe/MSI passthrough on ARM/ARM64

Hi Manish,
On 03/02/2016 09:11 AM, Jaggi, Manish wrote:
> 
> 
>>> From: Eric Auger <eric.auger@...aro.org>
>>> Sent: Tuesday, March 1, 2016 11:57 PM
>>> To: eric.auger@...com; eric.auger@...aro.org; robin.murphy@....com; alex.williamson@...hat.com; will.deacon@....com; joro@...tes.org; tglx@...utronix.de; >>jason@...edaemon.net; marc.zyngier@....com; christoffer.dall@...aro.org; linux-arm-kernel@...ts.infradead.org; kvmarm@...ts.cs.columbia.edu; kvm@...r.kernel.org
>>> Cc: suravee.suthikulpanit@....com; patches@...aro.org; linux-kernel@...r.kernel.org; Jaggi, Manish; Bharat.Bhushan@...escale.com; >>pranav.sawargaonkar@...il.com; p.fedin@...sung.com; iommu@...ts.linux-foundation.org
>>> Subject: [RFC v5 00/17] KVM PCIe/MSI passthrough on ARM/ARM64
> 
>>> This series addresses KVM PCIe passthrough with MSI enabled on ARM/ARM64.
>>> It pursues the efforts done on [1], [2], [3]. It also aims at covering the
>>> same need on PowerPC platforms although the same kind of integration
>>> .should be carried out.
>>>
> [snip]
>>> - Not tested: ARM GICv3 ITS
> 
> [snip]
>>> QEMU Integration:
>>> [RFC v2 0/8] KVM PCI/MSI passthrough with mach-virt
>>> (http://lists.gnu.org/archive/html/qemu-arm/2016-01/msg00444.html)
>>> https://git.linaro.org/people/eric.auger/qemu.git/shortlog/refs/heads/v2.5.0-pci-passthrough-rfc-v2
> 
> For gicv3 its, I believe, the below series for qemu and kernel is required for gicv3-its
> 
> [RFC PATCH v3 0/5] vITS support
> https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg05197.html
> 
> and in kernel CONFIG_HAVE_KVM_MSI must be enabled so that qemu sees MSI capability KVM_CAP_SIGNAL_MSI
> 
> This has a dependency on gsi routing support
> KVM: arm/arm64: gsi routing support
> https://lkml.org/lkml/2015/6/29/290

which has a dependency on Andre's ITS emulation series too.

The Kernel series will be resent soon on top on new vgic design.
> 
> I had both the above series in 4.2 in my local 4.2 tree. 

Did you have a chance to test with GICv3 ITS already?

Best Regards

Eric


> 
> BR
> -Manish
> 
>