Re: [Xen-devel] [PATCH] Fixing iopl and ioperm

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 14 Jun 2005, at 14:21, Keir Fraser wrote:

> Frankly, fixing this LTP test case will be a pain. If I have correctly 
> described what's going on then let's ignore it at least for now -- it 
> is not indicative of a real bug and it is entirely harmless. LTP is a 
> measure of stability for us, but passing every LTP test is not an end 
> in itself (we should understand the failures though).
Actually this is perhaps worth fixing, just to prevent a super-user 
process from denying I/O access to the kernel itself (by running 
iopl(0)). But please ignore the test failure in your patch: I can fix 
it properly next week.
Also, please don't change set_bitmap() unless you are fixing a bug to 
make it work with x86_64. I don;t care about simplifying its 
implementation -- I'd rather keep the diff against the native i386 
implementation as small as possible. As I originally said, I wonder if 
you actually need any changes to xen/i386/kernel/ioport.c at all.
 -- Keir


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