linux-kernel - RE: [Patch v4 00/13] Add PCI pass-thru support to Hyper-V Confidential VMs

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Message-ID: <SA1PR21MB1335741F74F96320304708ABBFC49@SA1PR21MB1335.namprd21.prod.outlook.com>
Date:   Thu, 19 Jan 2023 17:58:04 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Wei Liu <wei.liu@...nel.org>, Borislav Petkov <bp@...en8.de>
CC:     "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        "hpa@...or.com" <hpa@...or.com>, KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "luto@...nel.org" <luto@...nel.org>,
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        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
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        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
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        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>
Subject: RE: [Patch v4 00/13] Add PCI pass-thru support to Hyper-V
 Confidential VMs

> From: Wei Liu <wei.liu@...nel.org>
> Sent: Thursday, January 12, 2023 6:04 AM
> To: Borislav Petkov <bp@...en8.de>
> [...]
> On Mon, Jan 09, 2023 at 07:47:08PM +0100, Borislav Petkov wrote:
> > On Thu, Dec 01, 2022 at 07:30:18PM -0800, Michael Kelley wrote:
> > > This patch series adds support for PCI pass-thru devices to Hyper-V
> > > Confidential VMs (also called "Isolation VMs"). But in preparation, it
> > > first changes how private (encrypted) vs. shared (decrypted) memory is
> > > handled in Hyper-V SEV-SNP guest VMs. The new approach builds on the
> > > confidential computing (coco) mechanisms introduced in the 5.19 kernel
> > > for TDX support and significantly reduces the amount of Hyper-V specific
> > > code. Furthermore, with this new approach a proposed RFC patch set for
> > > generic DMA layer functionality[1] is no longer necessary.
> >
> > In any case, this is starting to get ready - how do we merge this?
> >
> > I apply the x86 bits and give Wei an immutable branch to add the rest of the
> > HyperV stuff ontop?
> 
> I can take all the patches if that's easier for you. I don't think
> anyone else is depending on the x86 patches in this series.
> 
> Giving me an immutable branch works too.
> 
> Thanks,
> Wei.
> > --
> > Regards/Gruss,
> >     Boris.

Hi Boris, Wei, any news on this?