Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs

From	Sinan Kaya <okaya@codeaurora.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs
Date	2017-03-22 15:20 +0100
Message-ID	<tnPhh-3Fu-61@gated-at.bofh.it> (permalink)
References	<tnOuR-32T-7@gated-at.bofh.it> <tnOEz-37h-39@gated-at.bofh.it> <tnOXU-3fe-11@gated-at.bofh.it> <tnP7z-3yz-1@gated-at.bofh.it>
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On 3/22/2017 10:04 AM, David Woodhouse wrote:
> On Wed, 2017-03-22 at 09:54 -0400, Sinan Kaya wrote:
>> On 3/22/2017 9:25 AM, David Woodhouse wrote:
>>>
>>>  
>>> +#ifdef __aarch64__
>>> +/* ARM64 wants to be special and not expose this through /proc
>>> like everyone else */
>>> +#undef HAVE_PCI_MMAP
>>> +#endif
>>> +
>> Where is this ARM64 special requirement coming from?
> 
> The idea is that as a new platform, ARM64 shouldn't need to implement
> legacy userspace interfaces.
> 
> http://lists.infradead.org/pipermail/linux-arm-kernel/2016-April/422571.html
> 

Aren't we breaking an ABI for userspace? I know DPDK relies on this feature.

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

Thread

[PATCH 00/17] PCI resource mmap cleanup David Woodhouse <dwmw2@infradead.org> - 2017-03-22 14:40 +0100
  [PATCH 04/17] pci: Add arch_can_pci_mmap_wc() macro David Woodhouse <dwmw2@infradead.org> - 2017-03-22 14:40 +0100
  [PATCH 15/17] sh: Use generic pci_mmap_resource_range() David Woodhouse <dwmw2@infradead.org> - 2017-03-22 14:40 +0100
  [PATCH 10/17] arm: Use generic pci_mmap_resource_range() David Woodhouse <dwmw2@infradead.org> - 2017-03-22 14:40 +0100
  [PATCH 17/17] arm64: Do not expose PCI mmap through procfs David Woodhouse <dwmw2@infradead.org> - 2017-03-22 14:40 +0100
    Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Sinan Kaya <okaya@codeaurora.org> - 2017-03-22 15:00 +0100
      Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs David Woodhouse <dwmw2@infradead.org> - 2017-03-22 15:10 +0100
        Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Will Deacon <will.deacon@arm.com> - 2017-03-22 15:20 +0100
          Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Sinan Kaya <okaya@codeaurora.org> - 2017-03-22 16:50 +0100
        Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Sinan Kaya <okaya@codeaurora.org> - 2017-03-22 15:20 +0100
    Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Arnd Bergmann <arnd@arndb.de> - 2017-03-24 17:20 +0100
      Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs Arnd Bergmann <arnd@arndb.de> - 2017-03-24 17:20 +0100
        Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs David Woodhouse <dwmw2@infradead.org> - 2017-03-24 17:30 +0100
      Re: [PATCH 17/17] arm64: Do not expose PCI mmap through procfs David Woodhouse <dwmw2@infradead.org> - 2017-03-24 17:30 +0100
  [PATCH 18/17] x86: Use generic pci_mmap_resource_range() David Woodhouse <dwmw2@infradead.org> - 2017-03-23 15:30 +0100
  Re: [PATCH 00/17] PCI resource mmap cleanup David Woodhouse <dwmw2@infradead.org> - 2017-03-24 12:50 +0100
    Re: [PATCH 00/17] PCI resource mmap cleanup "Luck, Tony" <tony.luck@intel.com> - 2017-03-24 18:00 +0100
  Re: [PATCH 00/17] PCI resource mmap cleanup Arnd Bergmann <arnd@arndb.de> - 2017-03-24 17:30 +0100

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