From: Jason Gunthorpe <jgg@nvidia.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
will@kernel.org, robin.murphy@arm.com, bhelgaas@google.com,
joro@8bytes.org, praan@google.com, baolu.lu@linux.intel.com,
kevin.tian@intel.com, miko.lenczewski@arm.com,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
dan.j.williams@intel.com, jonathan.cameron@huawei.com,
vsethi@nvidia.com, linux-cxl@vger.kernel.org, nirmoyd@nvidia.com
Subject: Re: [PATCH v4 1/3] PCI: Allow ATS to be always on for CXL.cache capable devices
Date: Tue, 19 May 2026 19:23:35 -0300 [thread overview]
Message-ID: <20260519222335.GK3602937@nvidia.com> (raw)
In-Reply-To: <20260519193649.GA715262@bhelgaas>
On Tue, May 19, 2026 at 02:36:49PM -0500, Bjorn Helgaas wrote:
> One motivation for putting this in the PCI core was to use the quirk
> infrastructure, but this series doesn't use any of that. It doesn't
> declare any fixups, e.g., DECLARE_PCI_FIXUP_FINAL, and it doesn't
> update any state cached by the PCI core.
It works like the acs quirks that are in the quirks file, which are
also arguably only used by iommu too :)
I'm not keen on spreading lists of device ids for PCI quirks to iommu
files, but it would be OK to move pci_ats_always_on() to
iommu_ats_always_on() that calls the PCI quirk function.
Thanks,
Jason
next prev parent reply other threads:[~2026-05-19 22:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 5:53 [PATCH v4 0/3] Allow ATS to be always on for certain ATS-capable devices Nicolin Chen
2026-04-27 5:54 ` [PATCH v4 1/3] PCI: Allow ATS to be always on for CXL.cache capable devices Nicolin Chen
2026-04-27 16:31 ` Dave Jiang
2026-04-30 21:41 ` Dan Williams (nvidia)
2026-04-30 23:28 ` Nicolin Chen
2026-05-01 23:27 ` Dan Williams (nvidia)
2026-05-01 23:46 ` Jason Gunthorpe
2026-05-02 0:19 ` Dan Williams (nvidia)
2026-05-19 19:36 ` Bjorn Helgaas
2026-05-19 22:23 ` Jason Gunthorpe [this message]
2026-05-19 23:48 ` Bjorn Helgaas
2026-05-20 0:05 ` Jason Gunthorpe
2026-05-20 1:04 ` Nicolin Chen
2026-04-27 5:54 ` [PATCH v4 2/3] PCI: Allow ATS to be always on for pre-CXL devices Nicolin Chen
2026-04-27 16:32 ` Dave Jiang
2026-04-27 5:54 ` [PATCH v4 3/3] iommu/arm-smmu-v3: Allow ATS to be always on Nicolin Chen
2026-04-27 16:37 ` Dave Jiang
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