Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in

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To: Arjan van de Ven <arjan@...>
Cc: <tcamuso@...>, Ivan Kokshaysky <ink@...>, Greg KH <greg@...>, Linus Torvalds <torvalds@...>, Greg KH <gregkh@...>, <linux-kernel@...>, Jeff Garzik <jeff@...>, <linux-pci@...>, Benjamin Herrenschmidt <benh@...>, Martin Mares <mj@...>, Loic Prylli <loic@...>, Prarit Bhargava <prarit@...>, Chumbalkar, Nagananda <Nagananda.Chumbalkar@...>, Schoeller, Patrick (Linux - Houston, TX) <Patrick.Schoeller@...>, Bhavana Nagendra <bnagendr@...>
Date: Sunday, January 13, 2008 - 12:47 am

On Sat, Jan 12, 2008 at 08:42:48PM -0800, Arjan van de Ven wrote:

I don't know if they 'screwed it up'.  There are devices that misbehave
when registers are read from pci config space.  But this was never
guaranteed to be a safe thing to do; it gradualy became clear that
people expected to be able to read random registers and manufacturers
responded accordingly, but I don't think you were ever guaranteed to be
able to peek at bits of config space arbitrarily.

-- 
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
--
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Messages in current thread:
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Thu Dec 27, 10:09 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Øyvind Vågen Jægtnes, (Tue Jan 15, 8:58 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Sun Jan 13, 12:42 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Mon Jan 14, 10:46 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Mon Jan 14, 12:01 pm)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Matthew Wilcox, (Sun Jan 13, 12:47 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Sat Jan 12, 11:46 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Benjamin Herrenschmidt, (Sun Jan 13, 3:08 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Mon Jan 28, 11:05 pm)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Wed Jan 30, 11:42 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Tue Jan 29, 10:47 am)
Re: [Patch v2] Make PCI extended config space (MMCONFIG) a d..., Arjan van de Ven, (Tue Jan 29, 11:29 am)
[PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Mon Jan 28, 11:03 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Tony Camuso, (Thu Feb 7, 11:54 am)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sat Feb 9, 8:41 am)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Sun Feb 10, 2:25 am)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sun Feb 10, 10:51 am)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Sun Feb 10, 4:16 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Linus Torvalds, (Sun Feb 10, 4:24 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sun Feb 10, 4:45 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Sun Feb 10, 9:49 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Andrew Morton, (Mon Feb 11, 6:10 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Ingo Molnar, (Mon Feb 11, 6:38 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Robert Hancock, (Sun Feb 10, 10:53 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Mon Feb 11, 1:59 am)
raw_pci_read in quirk_intel_irqbalance, Matthew Wilcox, (Sun Feb 10, 7:02 pm)
Re: raw_pci_read in quirk_intel_irqbalance, Matthew Wilcox, (Mon Feb 11, 1:04 am)
Re: raw_pci_read in quirk_intel_irqbalance, Grant Grundler, (Mon Feb 11, 3:49 am)
Re: raw_pci_read in quirk_intel_irqbalance, Matthew Wilcox, (Mon Feb 11, 12:15 pm)
Re: raw_pci_read in quirk_intel_irqbalance, Linus Torvalds, (Mon Feb 11, 1:18 pm)
Re: raw_pci_read in quirk_intel_irqbalance, Grant Grundler, (Mon Feb 11, 3:38 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sun Feb 10, 4:19 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Sun Feb 10, 4:25 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sun Feb 10, 4:32 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Yinghai Lu, (Sun Feb 10, 4:47 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Grant Grundler, (Sun Feb 10, 3:13 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Matthew Wilcox, (Sun Feb 10, 3:37 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Arjan van de Ven, (Thu Feb 7, 12:28 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Tony Camuso, (Thu Feb 7, 12:36 pm)
Re: [PATCH] Change pci_raw_ops to pci_raw_read/write, Grant Grundler, (Thu Feb 7, 10:28 pm)