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* [PATCH 0/2] Introduce PCI_FIXUP_IOMMU
@ 2020-05-26 11:49 Zhangfei Gao
  2020-05-26 11:49 ` [PATCH 1/2] PCI: " Zhangfei Gao
                   ` (3 more replies)
  0 siblings, 4 replies; 34+ messages in thread
From: Zhangfei Gao @ 2020-05-26 11:49 UTC (permalink / raw)
  To: Joerg Roedel, Bjorn Helgaas, Arnd Bergmann, Lorenzo Pieralisi,
	Hanjun Guo, Sudeep Holla, Rafael J. Wysocki, Len Brown,
	jean-philippe, Greg Kroah-Hartman, Herbert Xu, kenneth-lee-2012,
	Wangzhou
  Cc: linux-pci, linux-kernel, linux-acpi, iommu, linux-crypto,
	Zhangfei Gao, linux-arm-kernel

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

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^ permalink raw reply	[flat|nested] 34+ messages in thread

end of thread, other threads:[~2021-01-12  7:08 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-26 11:49 [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Zhangfei Gao
2020-05-26 11:49 ` [PATCH 1/2] PCI: " 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
2021-01-12  7:05                                     ` zhangfei.gao
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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