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From: "Jingoo Han" <jingoohan1@gmail.com>
To: "'Jon Masters'" <jcm@jonmasters.org>,
        "'Lorenzo Pieralisi'" <lorenzo.pieralisi@arm.com>,
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References: <20170419164913.19674-1-lorenzo.pieralisi@arm.com> <2e24e205-d761-9172-9463-4a53e1a0de4d@jonmasters.org>
In-Reply-To: <2e24e205-d761-9172-9463-4a53e1a0de4d@jonmasters.org>
Subject: Re: [PATCH v4 00/21] PCI: fix config space memory mappings
Date: Tue, 25 Apr 2017 12:20:02 -0400
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On Tuesday, April 25, 2017 2:41 AM, Jon Masters wrote:
> 
> On 04/19/2017 12:48 PM, Lorenzo Pieralisi wrote:
> 
> > On some platforms (ie ARM/ARM64) ioremap fails to comply with the PCI
> > configuration non-posted write transactions requirement, because it
> > provides a memory mapping that issues "bufferable" or, in PCI terms
> > "posted" write transactions. Likewise, the current pci_remap_iospace()
> > implementation maps the physical address range that the PCI translates
> > to I/O space cycles to virtual address space through pgprot_device()
> > attributes that on eg ARM64 provides a memory mapping issuing
> > posted writes transactions, which is not PCI specifications compliant.
> 
> Side note that I've pinged all of the ARM server vendors and asked them
> to verify this patch series on their platforms.

Good! I really want to know the result of these patches on ARM serves.
Please share it with us. Good luck.

Best regards,
Jingoo Han

> 
> Jon.