Re: [PATCH 2/2] x86: Allow disabling of sys_iopl, sys_ioperm
From: Ingo Molnar
Date: Wed Jul 20 2011 - 15:43:39 EST
* Mike Waychison <mikew@xxxxxxxxxx> wrote:
> On Thu, Jul 14, 2011 at 3:35 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> > On 07/14/2011 03:31 PM, Andrew Morton wrote:
> >> sys_iopl() is missing asmlinkage.
> >> It would be far more conventional to use cond_syscall(). Perhaps by
> >> adding a CONFIG_X86 area into kernel/sys_ni.c
> >> fyi, I'm offering special deals on checkpatch.pl site licenses this month.
> > Again, I don't think this makes sense as a compile-time-only option.
> echo "enabled" > /proc/sys/kernel/iopl_available
> echo "disabled" > /proc/sys/kernel/iopl_available
> echo "locked" > /proc/sys/kernel/iopl_available
1, 0 and -1 ought to be a rather straightforward mapping to 'on',
'off' and 'off forever'.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/