Public bug reported:

To improve PCI performance on arm64 AWS instances, enable
arch_can_pci_mmap_wc() via the patch:

    From: Clint Sbisa <csb...@amazon.com>
    Subject: [PATCH] arm64: Enable PCI write-combine resources under sysfs

    https://lore.kernel.org/linux-
pci/20200831151827.pumm2p54fyj7f...@amazon.com/

** Affects: linux-aws (Ubuntu)
     Importance: Undecided
     Assignee: Kamal Mostafa (kamalmostafa)
         Status: In Progress

** Affects: linux-aws (Ubuntu Bionic)
     Importance: Undecided
     Assignee: Kamal Mostafa (kamalmostafa)
         Status: In Progress

** Affects: linux-aws (Ubuntu Focal)
     Importance: Undecided
     Assignee: Kamal Mostafa (kamalmostafa)
         Status: In Progress

** Affects: linux-aws (Ubuntu Groovy)
     Importance: Undecided
     Assignee: Kamal Mostafa (kamalmostafa)
         Status: In Progress

** Also affects: linux-aws (Ubuntu Groovy)
   Importance: Undecided
     Assignee: Kamal Mostafa (kamalmostafa)
       Status: In Progress

** Also affects: linux-aws (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux-aws (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: linux-aws (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: linux-aws (Ubuntu Focal)
       Status: New => In Progress

** Changed in: linux-aws (Ubuntu Bionic)
     Assignee: (unassigned) => Kamal Mostafa (kamalmostafa)

** Changed in: linux-aws (Ubuntu Focal)
     Assignee: (unassigned) => Kamal Mostafa (kamalmostafa)

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https://bugs.launchpad.net/bugs/1893817

Title:
  aws: enable PCI write-combine for arm64

Status in linux-aws package in Ubuntu:
  In Progress
Status in linux-aws source package in Bionic:
  In Progress
Status in linux-aws source package in Focal:
  In Progress
Status in linux-aws source package in Groovy:
  In Progress

Bug description:
  To improve PCI performance on arm64 AWS instances, enable
  arch_can_pci_mmap_wc() via the patch:

      From: Clint Sbisa <csb...@amazon.com>
      Subject: [PATCH] arm64: Enable PCI write-combine resources under sysfs

      https://lore.kernel.org/linux-
  pci/20200831151827.pumm2p54fyj7f...@amazon.com/

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