From: Yu Zhang <zhangyu1@linux.microsoft.com>
To: Jacob Pan <jacob.pan@linux.microsoft.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
iommu@lists.linux.dev, linux-pci@vger.kernel.org,
linux-arch@vger.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,
tgopinath@linux.microsoft.com,
easwar.hariharan@linux.microsoft.com
Subject: Re: [PATCH v1 3/4] iommu/hyperv: Add para-virtualized IOMMU support for Hyper-V guest
Date: Thu, 21 May 2026 20:27:16 +0800 [thread overview]
Message-ID: <2k5pmxd7ml2p2dizujktj5zh4pyvzv4yjet2ekczilukt2avqm@w6puynixrf6t> (raw)
In-Reply-To: <20260520112708.00003640@linux.microsoft.com>
On Wed, May 20, 2026 at 11:27:08AM -0700, Jacob Pan wrote:
> Hi Yu,
>
> On Wed, 20 May 2026 23:25:43 +0800
> Yu Zhang <zhangyu1@linux.microsoft.com> wrote:
>
> > > > +static const struct iommu_domain_ops
> > > > hv_iommu_identity_domain_ops = {
> > > > + .attach_dev = hv_iommu_attach_dev,
> > > > +};
> > > > +
> > > > +static const struct iommu_domain_ops
> > > > hv_iommu_blocking_domain_ops = {
> > > > + .attach_dev = hv_iommu_attach_dev,
> > > > +};
> > >
> > > Usually I would expect these to have their own attach
> > > functions. blocking in particular must have an attach op that cannot
> > > fail. It is used to recover the device back to a known translation
> > > in case of cascading other errors.
> > >
> >
> > For blocking domain, the hypercall handler of such attach essentially
> > disable the translation and IOPF for the device.
> I think this should disable all faults, including unrecoverable fault
> reporting. right?
Yes, it should (e.g., my understanding is it shall set the FPD in scalable
mode context entry). Will double confirm with hypervisor team and make
sure it behaves so.
B.R.
Yu
next prev parent reply other threads:[~2026-05-21 12:27 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 16:24 [PATCH v1 0/4] Hyper-V: Add para-virtualized IOMMU support for Linux guests Yu Zhang
2026-05-11 16:24 ` [PATCH v1 1/4] iommu: Move Hyper-V IOMMU driver to its own subdirectory Yu Zhang
2026-05-15 22:19 ` Jason Gunthorpe
2026-05-20 6:37 ` Yu Zhang
2026-05-20 13:38 ` Jason Gunthorpe
2026-05-11 16:24 ` [PATCH v1 2/4] hyperv: Introduce new hypercall interfaces used by Hyper-V guest IOMMU Yu Zhang
2026-05-12 21:24 ` sashiko-bot
2026-05-11 16:24 ` [PATCH v1 3/4] iommu/hyperv: Add para-virtualized IOMMU support for Hyper-V guest Yu Zhang
2026-05-12 22:30 ` sashiko-bot
2026-05-13 18:39 ` Jacob Pan
2026-05-15 12:38 ` Yu Zhang
2026-05-14 18:13 ` Michael Kelley
2026-05-15 13:59 ` Yu Zhang
2026-05-15 14:51 ` Michael Kelley
2026-05-15 16:53 ` Yu Zhang
2026-05-15 17:36 ` Michael Kelley
2026-05-20 15:50 ` Yu Zhang
2026-05-16 0:11 ` Mukesh R
2026-05-18 9:38 ` Yu Zhang
2026-05-15 22:31 ` Jason Gunthorpe
2026-05-20 15:25 ` Yu Zhang
2026-05-20 18:27 ` Jacob Pan
2026-05-21 12:27 ` Yu Zhang [this message]
2026-05-11 16:24 ` [PATCH v1 4/4] iommu/hyperv: Add page-selective IOTLB flush support Yu Zhang
2026-05-12 23:45 ` sashiko-bot
2026-05-14 18:14 ` Michael Kelley
2026-05-14 21:16 ` Michael Kelley
2026-05-15 16:23 ` Yu Zhang
2026-05-15 18:00 ` Michael Kelley
2026-05-15 23:33 ` Michael Kelley
2026-05-20 16:27 ` Yu Zhang
2026-05-15 22:35 ` Jason Gunthorpe
2026-05-20 17:15 ` Yu Zhang
2026-05-20 17:29 ` Jason Gunthorpe
2026-05-20 19:26 ` Michael Kelley
2026-05-20 20:40 ` Jacob Pan
2026-05-21 15:45 ` Michael Kelley
2026-05-21 14:34 ` Yu Zhang
2026-05-21 15:39 ` Michael Kelley
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