From: John Garry <john.garry@huawei.com>
To: Saravana Kannan <saravanak@google.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Will Deacon <will@kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
Robin Murphy <robin.murphy@arm.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/7] iommu: Permit modular builds of ARM SMMU[v3] drivers
Date: Fri, 1 Nov 2019 10:27:59 +0000 [thread overview]
Message-ID: <6994ae35-2b89-2feb-2bcb-cffc5a01963c@huawei.com> (raw)
In-Reply-To: <CAGETcx-MuMVvj0O-MFdfmLADEq=cQY_=x+irvhgwHhG4VeeSdg@mail.gmail.com>
On 31/10/2019 23:34, Saravana Kannan via iommu wrote:
> I looked into the iommu-map property and it shouldn't be too hard to
> add support for it. Looks like we can simply hold off on probing the
> root bridge device till all the iommus in its iommu-map are probed and
> we should be fine.
>
>> I'm also unsure about distro vendors agreeing to a mandatory kernel
>> parameter (of_devlink). Do you plan to eventually enable it by default?
>>
>>> static const struct supplier_bindings of_supplier_bindings[] = {
>>> { .parse_prop = parse_clocks, },
>>> { .parse_prop = parse_interconnects, },
>>> { .parse_prop = parse_regulators, },
>>> + { .parse_prop = parse_iommus, },
>>> {},
>>> };
>>>
>>> I plan to upstream this pretty soon, but I have other patches in
>>> flight that touch the same file and I'm waiting for those to get
>>> accepted. I also want to clean up the code a bit to reduce some
>>> repetition before I add support for more bindings.
>> I'm also wondering about ACPI support.
> I'd love to add ACPI support too, but I have zero knowledge of ACPI.
> I'd be happy to help anyone who wants to add ACPI support that allows
> ACPI to add device links.
If possible to add, that may be useful for remedying this:
https://lore.kernel.org/linux-iommu/9625faf4-48ef-2dd3-d82f-931d9cf26976@huawei.com/
Thanks,
John
>
>> IOMMU already has a sort of
>> canonical code path that links endpoints to their IOMMU
>> (iommu_probe_device()), after the firmware descriptions have been parsed.
>> So if we created the device links in the iommu core, for example
>> iommu_bus_notifier(), we would support all firmware interface fl
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next prev parent reply other threads:[~2019-11-01 10:28 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-30 14:51 [PATCH 0/7] iommu: Permit modular builds of ARM SMMU[v3] drivers Will Deacon
2019-10-30 14:51 ` [PATCH 1/7] drivers/iommu: Export core IOMMU API symbols to permit modular drivers Will Deacon
2019-10-30 14:51 ` [PATCH 2/7] iommu/of: Request ACS from the PCI core when configuring IOMMU linkage Will Deacon
2019-10-30 14:51 ` [PATCH 3/7] PCI: Export pci_ats_disabled() as a GPL symbol to modules Will Deacon
2019-10-30 20:30 ` Bjorn Helgaas
2019-10-30 14:51 ` [PATCH 4/7] Revert "iommu/arm-smmu: Make arm-smmu-v3 explicitly non-modular" Will Deacon
2019-10-30 14:51 ` [PATCH 5/7] iommu/arm-smmu-v3: Allow building as a module Will Deacon
2019-10-30 19:31 ` Joerg Roedel
2019-10-31 15:42 ` Will Deacon
2019-11-04 19:15 ` Jean-Philippe Brucker
2019-11-08 14:54 ` Will Deacon
2019-11-05 12:15 ` Joerg Roedel
2019-11-08 11:03 ` Will Deacon
2019-10-30 14:51 ` [PATCH 6/7] Revert "iommu/arm-smmu: Make arm-smmu explicitly non-modular" Will Deacon
2019-10-30 23:09 ` Jordan Crouse
2019-10-31 12:03 ` Will Deacon
2019-10-31 15:32 ` Jordan Crouse
2019-10-30 14:51 ` [PATCH 7/7] iommu/arm-smmu: Allow building as a module Will Deacon
2019-10-30 15:22 ` Rob Herring
2019-10-30 15:26 ` Will Deacon
2019-10-30 15:33 ` Robin Murphy
2019-11-04 19:34 ` Isaac J. Manjarres
2019-11-07 12:48 ` Will Deacon
2019-10-30 15:35 ` [PATCH 0/7] iommu: Permit modular builds of ARM SMMU[v3] drivers Robin Murphy
2019-10-30 15:54 ` Will Deacon
2019-10-31 0:57 ` Saravana Kannan via iommu
2019-10-31 19:37 ` Jean-Philippe Brucker
2019-10-31 23:34 ` Saravana Kannan via iommu
2019-11-01 10:27 ` John Garry [this message]
2019-11-01 21:13 ` Saravana Kannan via iommu
2019-11-04 12:16 ` John Garry
2019-11-04 13:29 ` Robin Murphy
2019-11-07 6:11 ` Saravana Kannan via iommu
2019-11-07 9:13 ` Jean-Philippe Brucker
2019-11-07 6:02 ` Saravana Kannan via iommu
2019-11-01 11:41 ` Jean-Philippe Brucker
2019-11-01 12:28 ` Lorenzo Pieralisi
2019-11-01 21:26 ` Saravana Kannan via iommu
2019-11-04 11:43 ` Lorenzo Pieralisi
2019-11-07 5:55 ` Saravana Kannan via iommu
2019-11-01 17:21 ` Will Deacon
2019-11-04 7:54 ` Jean-Philippe Brucker
2019-11-07 6:16 ` Saravana Kannan via iommu
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