linux-kernel - Re: [RFC PATCH v2 09/10] iommu/dma: Support MSIs through nested domains

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Message-ID: <CANXhq0psbMY7B=wBL_K8b5rnsfWaBJk+Ea49BpvLO8Sfwwyz7g@mail.gmail.com>
Date: Mon, 17 Jun 2024 10:15:12 +0800
From: Zong Li <zong.li@...ive.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: joro@...tes.org, will@...nel.org, robin.murphy@....com, 
	tjeznach@...osinc.com, paul.walmsley@...ive.com, palmer@...belt.com, 
	aou@...s.berkeley.edu, jgg@...pe.ca, kevin.tian@...el.com, 
	linux-kernel@...r.kernel.org, iommu@...ts.linux.dev, 
	linux-riscv@...ts.infradead.org
Subject: Re: [RFC PATCH v2 09/10] iommu/dma: Support MSIs through nested domains

On Sat, Jun 15, 2024 at 2:12 AM Nicolin Chen <nicolinc@...dia.com> wrote:
>
> On Fri, Jun 14, 2024 at 10:21:55PM +0800, Zong Li wrote:
> > From: Robin Murphy <robin.murphy@....com>
> >
> > Currently, iommu-dma is the only place outside of IOMMUFD and drivers
> > which might need to be aware of the stage 2 domain encapsulated within
> > a nested domain. This would be in the legacy-VFIO-style case where we're
> > using host-managed MSIs with an identity mapping at stage 1, where it is
> > the underlying stage 2 domain which owns an MSI cookie and holds the
> > corresponding dynamic mappings. Hook up the new op to resolve what we
> > need from a nested domain.
> >
> > Signed-off-by: Robin Murphy <robin.murphy@....com>
> > Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
>
> I think there should be your Signed-off line at the end since you
> act as a submitter :)

Got it, add it in the next version, thanks.

>
> Thanks
> Nicolin