From: "Tian, Kevin" <kevin.tian@intel.com>
To: Baolu Lu <baolu.lu@linux.intel.com>,
Jason Gunthorpe <jgg@ziepe.ca>, "Joerg Roedel" <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Nicolin Chen <nicolinc@nvidia.com>,
"Liu, Yi L" <yi.l.liu@intel.com>,
"Jacob Pan" <jacob.jun.pan@linux.intel.com>,
Joel Granados <j.granados@samsung.com>
Cc: "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v5 5/9] iommufd: Add iommufd fault object
Date: Mon, 20 May 2024 03:33:14 +0000 [thread overview]
Message-ID: <BN9PR11MB52765979B524A9362B3D773B8CE92@BN9PR11MB5276.namprd11.prod.outlook.com> (raw)
In-Reply-To: <e30d919c-2e28-4e01-8317-2a4d82049056@linux.intel.com>
> From: Baolu Lu <baolu.lu@linux.intel.com>
> Sent: Monday, May 20, 2024 9:34 AM
>
> On 5/15/24 4:37 PM, Tian, Kevin wrote:
> >> +
> >> + iopf_group_response(group, response.code);
> > PCIe spec states that a response failure disables the PRI interface. For SR-
> IOV
> > it'd be dangerous allowing user to trigger such code to VF to close the
> entire
> > shared PRI interface.
> >
> > Just another example lacking of coordination for shared capabilities
> between
> > PF/VF. But exposing such gap to userspace makes it worse.
>
> Yes. You are right.
>
> >
> > I guess we don't want to make this work depending on that cleanup. The
> > minimal correct thing is to disallow attaching VF to a fault-capable hwpt
> > with a note here that once we turn on support for VF the response failure
> > code should not be forwarded to the hardware. Instead it's an indication
> > that the user cannot serve more requests and such situation waits for
> > a vPRI reset to recover.
>
> Is it the same thing to disallow PRI for VF in IOMMUFD?
>
yes
next prev parent reply other threads:[~2024-05-20 3:33 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 14:57 [PATCH v5 0/9] IOMMUFD: Deliver IO page faults to user space Lu Baolu
2024-04-30 14:57 ` [PATCH v5 1/9] iommu: Introduce domain attachment handle Lu Baolu
2024-05-15 7:17 ` Tian, Kevin
2024-05-19 10:07 ` Baolu Lu
2024-04-30 14:57 ` [PATCH v5 2/9] iommu: Replace sva_iommu with iommu_attach_handle Lu Baolu
2024-05-07 23:58 ` Jason Gunthorpe
2024-05-15 7:21 ` Tian, Kevin
2024-05-19 10:14 ` Baolu Lu
2024-05-20 3:18 ` Tian, Kevin
2024-04-30 14:57 ` [PATCH v5 3/9] iommu: Add attachment handle to struct iopf_group Lu Baolu
2024-05-08 0:04 ` Jason Gunthorpe
2024-05-10 3:14 ` Baolu Lu
2024-05-10 13:38 ` Jason Gunthorpe
2024-05-10 14:30 ` Baolu Lu
2024-05-10 16:28 ` Jason Gunthorpe
2024-05-15 7:28 ` Tian, Kevin
2024-05-15 7:31 ` Tian, Kevin
2024-05-19 14:03 ` Baolu Lu
2024-05-20 3:20 ` Tian, Kevin
2024-04-30 14:57 ` [PATCH v5 4/9] iommufd: Add fault and response message definitions Lu Baolu
2024-05-15 7:43 ` Tian, Kevin
2024-05-19 14:37 ` Baolu Lu
2024-05-20 3:24 ` Tian, Kevin
2024-05-20 3:33 ` Baolu Lu
2024-05-20 4:59 ` Tian, Kevin
2024-05-24 14:15 ` Jason Gunthorpe
2024-05-27 1:27 ` Tian, Kevin
2024-04-30 14:57 ` [PATCH v5 5/9] iommufd: Add iommufd fault object Lu Baolu
2024-05-08 0:11 ` Jason Gunthorpe
2024-05-08 10:05 ` Baolu Lu
2024-05-15 7:57 ` Tian, Kevin
2024-05-20 0:41 ` Baolu Lu
2024-05-20 3:26 ` Tian, Kevin
2024-05-20 3:28 ` Baolu Lu
2024-05-08 0:22 ` Jason Gunthorpe
2024-05-10 9:13 ` Baolu Lu
2024-05-15 8:37 ` Tian, Kevin
2024-05-20 1:15 ` Baolu Lu
2024-05-20 1:24 ` Baolu Lu
2024-05-24 14:16 ` Jason Gunthorpe
2024-05-20 1:33 ` Baolu Lu
2024-05-20 3:33 ` Tian, Kevin [this message]
2024-05-20 1:38 ` Baolu Lu
2024-04-30 14:57 ` [PATCH v5 6/9] iommufd: Fault-capable hwpt attach/detach/replace Lu Baolu
2024-05-08 0:18 ` Jason Gunthorpe
2024-05-10 3:20 ` Baolu Lu
2024-05-10 13:39 ` Jason Gunthorpe
2024-05-15 8:43 ` Tian, Kevin
2024-05-20 2:10 ` Baolu Lu
2024-05-20 3:35 ` Tian, Kevin
2024-05-20 3:55 ` Baolu Lu
2024-04-30 14:57 ` [PATCH v5 7/9] iommufd: Associate fault object with iommufd_hw_pgtable Lu Baolu
2024-05-08 0:25 ` Jason Gunthorpe
2024-05-10 3:23 ` Baolu Lu
2024-05-15 8:50 ` Tian, Kevin
2024-05-20 2:18 ` Baolu Lu
2024-05-20 3:39 ` Tian, Kevin
2024-05-20 4:00 ` Baolu Lu
2024-05-24 14:24 ` Jason Gunthorpe
2024-05-27 1:33 ` Tian, Kevin
2024-05-27 3:16 ` Baolu Lu
2024-04-30 14:57 ` [PATCH v5 8/9] iommufd/selftest: Add IOPF support for mock device Lu Baolu
2024-04-30 14:57 ` [PATCH v5 9/9] iommufd/selftest: Add coverage for IOPF test Lu Baolu
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