From: "H. Peter Anvin" <hpa@zytor.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: David Miller <davem@davemloft.net>,
Tony Luck <tony.luck@intel.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Steven Newbury <steve@snewbury.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first
Date: Tue, 29 May 2012 13:50:45 -0700 [thread overview]
Message-ID: <4FC536A5.6020600@zytor.com> (raw)
In-Reply-To: <CAE9FiQUWMAdU5jtKfq1_=1E-574gW-Afo8Pby49mUFQYFrs9Pw@mail.gmail.com>
On 05/29/2012 01:46 PM, Yinghai Lu wrote:
> On Tue, May 29, 2012 at 12:03 PM, H. Peter Anvin <hpa@zytor.com> wrote:
>> On 05/29/2012 11:17 AM, Yinghai Lu wrote:
>>>
>>> pci bridge could support 16bits and 32bits io port.
>>> but we did not record if 32bits is supported.
>>>
>>
>> Okay, so this is the actual problem, no?
>
> their fw could not need kernel help to allocate io ports, or they are
> only use device that support 32bit ioport.
>
That barely parses, never mind makes sense.
>>
>>> so during allocating, could have allocated above 64k address to non
>>> 32bit bridge.
>>>
>>> but x86 is ok, because ioport.end always set to 0xffff.
>>> other arches with IO_SPACE_LIMIT with 0xffffffff or
>>> 0xffffffffffffffffUL may have problem.
>>
>> The latter is nonsense, the PCI-side address space is only 32 bits wide.
>>
> maybe they have unified io include ioport and mem io?
>
The bus-side address space should not be more than 32 bits no matter
what. As Bjorn indicates, you seem to be mixing up bus and cpu
addresses all over the place.
-hpa
next prev parent reply other threads:[~2012-05-29 20:51 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-23 6:34 [PATCH 00/11] PCI: resource allocation related Yinghai Lu
2012-05-23 6:34 ` [PATCH 01/11] PCI: Should add children device res to fail list Yinghai Lu
2012-05-23 6:34 ` [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first Yinghai Lu
2012-05-23 15:57 ` Linus Torvalds
2012-05-23 17:30 ` Yinghai Lu
2012-05-23 18:40 ` Yinghai Lu
2012-05-25 4:36 ` Bjorn Helgaas
2012-05-25 17:53 ` Yinghai Lu
2012-05-25 18:39 ` Yinghai Lu
2012-05-25 19:37 ` Bjorn Helgaas
2012-05-25 20:18 ` H. Peter Anvin
2012-05-25 20:19 ` Yinghai Lu
2012-05-25 21:55 ` Bjorn Helgaas
2012-05-25 21:58 ` H. Peter Anvin
2012-05-25 22:14 ` Bjorn Helgaas
2012-05-25 23:10 ` Yinghai Lu
2012-05-26 0:12 ` Bjorn Helgaas
2012-05-26 15:01 ` Bjorn Helgaas
2012-05-29 17:56 ` Yinghai Lu
2012-05-29 17:55 ` Yinghai Lu
2012-05-29 17:57 ` H. Peter Anvin
2012-05-29 18:17 ` Yinghai Lu
2012-05-29 19:03 ` H. Peter Anvin
2012-05-29 20:46 ` Yinghai Lu
2012-05-29 20:50 ` H. Peter Anvin [this message]
2012-06-01 23:30 ` Yinghai Lu
2012-06-04 1:05 ` Bjorn Helgaas
2012-06-05 2:37 ` Yinghai Lu
2012-06-05 4:50 ` Bjorn Helgaas
2012-06-05 5:04 ` Yinghai Lu
2012-06-06 9:44 ` Steven Newbury
2012-06-06 16:18 ` Bjorn Helgaas
[not found] ` <CAGLnvc_ejMWiiubVMo7DLz5ZVn1iMbf67FB4H7crRCCTRRqt2A@mail.gmail.com>
2012-07-04 3:00 ` joeyli
2012-05-29 20:53 ` David Miller
2012-05-29 19:23 ` Bjorn Helgaas
2012-05-29 20:40 ` Yinghai Lu
2012-05-29 23:24 ` Bjorn Helgaas
2012-05-29 23:27 ` Bjorn Helgaas
2012-05-29 23:33 ` Yinghai Lu
2012-05-29 23:47 ` Bjorn Helgaas
2012-05-30 7:40 ` Steven Newbury
2012-05-30 16:27 ` Bjorn Helgaas
2012-05-30 16:30 ` H. Peter Anvin
2012-05-30 16:33 ` Linus Torvalds
2012-05-23 6:34 ` [PATCH 03/11] intel-gtt: Read 64bit for gmar_bus_addr Yinghai Lu
2012-05-23 7:21 ` Dave Airlie
2012-05-23 7:44 ` Daniel Vetter
2012-05-23 6:34 ` [PATCH 04/11] PCI: Make sure assign same align with large size resource at first Yinghai Lu
2012-05-23 6:34 ` [PATCH 05/11] resources: Split out __allocate_resource() Yinghai Lu
2012-05-23 6:34 ` [PATCH 06/11] resource: make find_resource could return just fit resource Yinghai Lu
2012-05-23 6:34 ` [PATCH 07/11] PCI: Don't allocate small resource in big empty space Yinghai Lu
2012-05-23 6:34 ` [PATCH 08/11] resource: only return range with needed align Yinghai Lu
2012-05-23 6:34 ` [PATCH 09/11] PCI: Add is_pci_iov_resource_idx() Yinghai Lu
2012-05-23 6:34 ` [PATCH 10/11] PCI: Sort unassigned resources with correct alignment Yinghai Lu
2012-05-23 6:34 ` [PATCH 11/11] PCI: Treat ROM resource as optional during assigning Yinghai Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4FC536A5.6020600@zytor.com \
--to=hpa@zytor.com \
--cc=akpm@linux-foundation.org \
--cc=bhelgaas@google.com \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=steve@snewbury.org.uk \
--cc=tony.luck@intel.com \
--cc=torvalds@linux-foundation.org \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome