netdev - Re: [Patch v4 00/13] Add PCI pass-thru support to Hyper-V Confidential VMs

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Date:   Thu, 12 Jan 2023 14:03:35 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Michael Kelley <mikelley@...rosoft.com>, wei.liu@...nel.org,
        hpa@...or.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        decui@...rosoft.com, luto@...nel.org, peterz@...radead.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, lpieralisi@...nel.org, robh@...nel.org,
        kw@...ux.com, bhelgaas@...gle.com, arnd@...db.de,
        hch@...radead.org, m.szyprowski@...sung.com, robin.murphy@....com,
        thomas.lendacky@....com, brijesh.singh@....com, tglx@...utronix.de,
        mingo@...hat.com, dave.hansen@...ux.intel.com,
        Tianyu.Lan@...rosoft.com, kirill.shutemov@...ux.intel.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, ak@...ux.intel.com,
        isaku.yamahata@...el.com, dan.j.williams@...el.com,
        jane.chu@...cle.com, seanjc@...gle.com, tony.luck@...el.com,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, netdev@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-arch@...r.kernel.org,
        iommu@...ts.linux.dev
Subject: Re: [Patch v4 00/13] Add PCI pass-thru support to Hyper-V
 Confidential VMs

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.
> 
> https://people.kernel.org/tglx/notes-about-netiquette