linux-kernel - Re: [discuss] Re: Please pull x86-64 bug fixes

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Date:	Fri, 6 Oct 2006 00:52:46 +0200
From:	Andi Kleen <ak@...e.de>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Jeff Garzik <jeff@...zik.org>, discuss@...-64.org,
	linux-kernel@...r.kernel.org
Subject: Re: [discuss] Re: Please pull x86-64 bug fixes


> In other words, right now we have
> 
> 	int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
> 
> and maybe we will simply have to add a totally new function like
> 
> 	int pci_read_mmio_config_byte(struct pci_dev *dev, int where, u8 *val)
> 
> for drivers that literally _require_ the mmio accesses for one reason or 
> another.

That's easy to decide: if (where >= 256) mmconfig is required. 

I'm just afraid it probably won't help if the MCFG is totally broken and
points to some other devices (like on the Intel boards). Then these drivers will 
just hang and all of Alan's warning  messages won't help with that.

-Andi
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