From: Zhangfei Gao <zhangfei.gao@linaro.org>
To: Joerg Roedel <joro@8bytes.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Arnd Bergmann <arnd@arndb.de>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Hanjun Guo <guohanjun@huawei.com>,
Sudeep Holla <sudeep.holla@arm.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
jean-philippe <jean-philippe@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
kenneth-lee-2012@foxmail.com, Wangzhou <wangzhou1@hisilicon.com>
Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-acpi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org,
Zhangfei Gao <zhangfei.gao@linaro.org>
Subject: [PATCH 0/2] Introduce PCI_FIXUP_IOMMU
Date: Tue, 26 May 2020 19:49:07 +0800 [thread overview]
Message-ID: <1590493749-13823-1-git-send-email-zhangfei.gao@linaro.org> (raw)
Some platform devices appear as PCI but are actually on the AMBA bus,
and they need fixup in drivers/pci/quirks.c handling iommu_fwnode.
Here introducing PCI_FIXUP_IOMMU, which is called after iommu_fwnode
is allocated, instead of reusing PCI_FIXUP_FINAL since it will slow
down iommu probing as all devices in fixup final list will be
reprocessed, suggested by Joerg, [1]
For example:
Hisilicon platform device need fixup in
drivers/pci/quirks.c handling fwspec->can_stall, which is introduced in [2]
+static void quirk_huawei_pcie_sva(struct pci_dev *pdev)
+{
+ struct iommu_fwspec *fwspec;
+
+ pdev->eetlp_prefix_path = 1;
+ fwspec = dev_iommu_fwspec_get(&pdev->dev);
+ if (fwspec)
+ fwspec->can_stall = 1;
+}
+
+DECLARE_PCI_FIXUP_IOMMU(PCI_VENDOR_ID_HUAWEI, 0xa250, quirk_huawei_pcie_sva);
+DECLARE_PCI_iFIXUP_IOMMU(PCI_VENDOR_ID_HUAWEI, 0xa251, quirk_huawei_pcie_sva);
[1] https://www.spinics.net/lists/iommu/msg44591.html
[2] https://www.spinics.net/lists/linux-pci/msg94559.html
Zhangfei Gao (2):
PCI: Introduce PCI_FIXUP_IOMMU
iommu: calling pci_fixup_iommu in iommu_fwspec_init
drivers/iommu/iommu.c | 4 ++++
drivers/pci/quirks.c | 7 +++++++
include/asm-generic/vmlinux.lds.h | 3 +++
include/linux/pci.h | 8 ++++++++
4 files changed, 22 insertions(+)
--
2.7.4
next reply other threads:[~2020-05-26 11:49 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-26 11:49 Zhangfei Gao [this message]
2020-05-26 11:49 ` [PATCH 1/2] PCI: Introduce PCI_FIXUP_IOMMU Zhangfei Gao
2020-05-26 14:46 ` Christoph Hellwig
2020-05-26 15:09 ` Zhangfei Gao
2020-05-27 9:01 ` Greg Kroah-Hartman
2020-05-26 11:49 ` [PATCH 2/2] iommu: calling pci_fixup_iommu in iommu_fwspec_init Zhangfei Gao
2020-05-27 9:01 ` Greg Kroah-Hartman
2020-05-28 6:53 ` Zhangfei Gao
2020-05-27 9:00 ` [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Greg Kroah-Hartman
2020-05-27 9:53 ` Arnd Bergmann
2020-05-27 13:51 ` Zhangfei Gao
2020-05-27 18:18 ` Bjorn Helgaas
2020-05-28 6:46 ` Zhangfei Gao
2020-05-28 7:33 ` Joerg Roedel
2020-06-01 17:41 ` Bjorn Helgaas
2020-06-04 13:33 ` Zhangfei Gao
2020-06-05 23:19 ` Bjorn Helgaas
2020-06-08 2:54 ` Zhangfei Gao
2020-06-08 16:41 ` Bjorn Helgaas
2020-06-09 4:01 ` Zhangfei Gao
2020-06-09 9:15 ` Arnd Bergmann
2020-06-09 16:49 ` Bjorn Helgaas
2020-06-11 2:54 ` Zhangfei Gao
2020-06-11 13:44 ` Bjorn Helgaas
2020-06-13 14:30 ` Zhangfei Gao
2020-06-15 23:52 ` Bjorn Helgaas
2020-06-19 2:26 ` Zhangfei Gao
2020-06-23 15:04 ` Bjorn Helgaas
2020-12-16 11:24 ` Zhou Wang
2020-12-17 20:38 ` Bjorn Helgaas
2020-06-22 11:55 ` Joerg Roedel
2020-06-23 7:48 ` Zhangfei Gao
2020-06-22 11:53 ` Joerg Roedel
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