linux-kernel - Re: [PATCH v7 0/5] Disable ATS via iommu during PCI resets

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Message-ID: <aSX1srhPwWC0HXNw@Asurada-Nvidia>
Date: Tue, 25 Nov 2025 10:30:10 -0800
From: Nicolin Chen <nicolinc@...dia.com>
To: Jörg Rödel <joro@...tes.org>, <helgaas@...nel.org>
CC: <afael@...nel.org>, <bhelgaas@...gle.com>, <alex@...zbot.org>,
	<jgg@...dia.com>, <will@...nel.org>, <robin.murphy@....com>,
	<lenb@...nel.org>, <kevin.tian@...el.com>, <baolu.lu@...ux.intel.com>,
	<linux-arm-kernel@...ts.infradead.org>, <iommu@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
	<linux-pci@...r.kernel.org>, <kvm@...r.kernel.org>,
	<patches@...ts.linux.dev>, <pjaroszynski@...dia.com>, <vsethi@...dia.com>,
	<etzhao1900@...il.com>
Subject: Re: [PATCH v7 0/5] Disable ATS via iommu during PCI resets

On Tue, Nov 25, 2025 at 03:22:03PM +0100, Jörg Rödel wrote:
> On Fri, Nov 21, 2025 at 05:57:27PM -0800, Nicolin Chen wrote:
> > Nicolin Chen (5):
> >   iommu: Lock group->mutex in iommu_deferred_attach()
> >   iommu: Tidy domain for iommu_setup_dma_ops()
> >   iommu: Add iommu_driver_get_domain_for_dev() helper
> >   iommu: Introduce pci_dev_reset_iommu_prepare/done()
> >   PCI: Suspend iommu function prior to resetting a device
> > 
> >  drivers/iommu/dma-iommu.h                   |   5 +-
> >  include/linux/iommu.h                       |  14 ++
> >  include/uapi/linux/vfio.h                   |   4 +
> >  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |   5 +-
> >  drivers/iommu/dma-iommu.c                   |   4 +-
> >  drivers/iommu/iommu.c                       | 220 +++++++++++++++++++-
> >  drivers/pci/pci-acpi.c                      |  13 +-
> >  drivers/pci/pci.c                           |  65 +++++-
> >  drivers/pci/quirks.c                        |  19 +-
> >  9 files changed, 326 insertions(+), 23 deletions(-)
> 
> Looks good from an IOMMU perspective, but needs Ack from PCI side.

Thanks, Joerg.

@Bjorn,

I have addressed your remarks from v5. Would you mind giving a
second look so that we might be able to make it to this cycle?

Thank you!
Nicolin