linux-kernel - Re: ioremap_xxx() with EXEC enabled

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Date:	Wed, 30 Jan 2008 21:00:00 +0800
From:	"huang ying" <huang.ying.caritas@...il.com>
To:	"Andi Kleen" <ak@...e.de>
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	"Ingo Molnar" <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: ioremap_xxx() with EXEC enabled

On Jan 30, 2008 5:59 PM, Andi Kleen <ak@...e.de> wrote:
> On Wednesday 30 January 2008 10:32, Huang, Ying wrote:
> > Hi,
> >
> > On i386, EFI may need to map EFI runtime code area as EXEC enabled with
> > ioremap(). But, I found that the memory are mapped as EXEC disabled when
> > mapped with ioremap() now. I think we may need a method to map memory
> > area as EXEC enabled with ioremap_xxx(). Some possible interface schemes
> > for mapping as EXEC enabled are as follow:
>
> Does __ioremap(..., PAGE_KERNEL_EXEC) not work?

The the last parameter of the current implementation of __ioremap() in
x86 git is  enum ioremap_mode (IOR_MODE_UNCACHED and IOR_MODE_CACHED),
not the flags like before. So this does not work.

Best Regards,
Huang Ying
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