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

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Message-ID: <ZmyIASyk5pfm8hwa@Asurada-Nvidia>
Date: Fri, 14 Jun 2024 11:12:17 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: Zong Li <zong.li@...ive.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 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 :)

Thanks
Nicolin