From: Jason Gunthorpe <jgg@ziepe.ca>
To: Yu Zhang <zhangyu1@linux.microsoft.com>
Cc: linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
iommu@lists.linux.dev, linux-pci@vger.kernel.org,
linux-arch@vger.kernel.org, x86@kernel.org, wei.liu@kernel.org,
kys@microsoft.com, haiyangz@microsoft.com, decui@microsoft.com,
longli@microsoft.com, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, bhelgaas@google.com,
kwilczynski@kernel.org, lpieralisi@kernel.org, mani@kernel.org,
robh@kernel.org, arnd@arndb.de, mhklinux@outlook.com,
jacob.pan@linux.microsoft.com, tgopinath@linux.microsoft.com,
easwar.hariharan@linux.microsoft.com,
mrathor@linux.microsoft.com, baolu.lu@linux.intel.com,
suravee.suthikulpanit@amd.com, vasant.hegde@amd.com
Subject: Re: [PATCH v3 4/5] iommu/hyperv: Add para-virtualized IOMMU support for Hyper-V guest
Date: Thu, 13 Aug 2026 10:49:36 -0300 [thread overview]
Message-ID: <20260813134936.GM662699@ziepe.ca> (raw)
In-Reply-To: <20260811155022.108148-5-zhangyu1@linux.microsoft.com>
On Tue, Aug 11, 2026 at 11:50:20PM +0800, Yu Zhang wrote:
> +static void hv_iommu_release_device(struct device *dev)
> +{
> + struct hv_iommu_endpoint *vdev = dev_iommu_priv_get(dev);
> + struct pci_dev *pdev = to_pci_dev(dev);
> +
> + if (pdev->ats_enabled)
> + pci_disable_ats(pdev);
Since attaching blocking does this and you set blocking as your
release domain, this is redundant.
The new flow looks alot better, removing the detach operation entirely
makes sense if the HV can support attach on attach
Jason
next prev parent reply other threads:[~2026-08-13 13:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-11 15:50 [PATCH v3 0/5] Hyper-V: Add para-virtualized IOMMU support for Linux guests Yu Zhang
2026-08-11 15:50 ` [PATCH v3 1/5] hyperv: Introduce new hypercall interfaces used by Hyper-V guest IOMMU Yu Zhang
2026-08-12 18:08 ` Jacob Pan
2026-08-14 1:31 ` Mukesh R
2026-08-11 15:50 ` [PATCH v3 2/5] Drivers: hv: Add logical device ID registry for vPCI devices Yu Zhang
2026-08-11 15:50 ` [PATCH v3 3/5] iommu/x86: Share the architectural MSI reserved range Yu Zhang
2026-08-11 16:21 ` Jason Gunthorpe
2026-08-12 8:58 ` Yu Zhang
2026-08-12 12:30 ` Jason Gunthorpe
2026-08-11 15:50 ` [PATCH v3 4/5] iommu/hyperv: Add para-virtualized IOMMU support for Hyper-V guest Yu Zhang
2026-08-13 13:49 ` Jason Gunthorpe [this message]
2026-08-13 18:02 ` Easwar Hariharan
2026-08-13 22:29 ` Jacob Pan
2026-08-13 22:46 ` Jason Gunthorpe
2026-08-11 15:50 ` [PATCH v3 5/5] iommu/hyperv: Add page-selective IOTLB flush support Yu Zhang
2026-08-13 23:07 ` Jacob Pan
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