On 06/23/2014 05:01 PM, Andy Lutomirski wrote:
> I suspect that the existence of the get operation matters more. What
> if the checkpointed process has the cached copy out of sync with the
> register copy? More realistically, what if the checkpointed process
> doesn't want to use kernel MPX assis
On Mon, Jun 23, 2014 at 4:42 PM, Dave Hansen wrote:
> On 06/23/2014 03:00 PM, Andy Lutomirski wrote:
>> Hmm. How about PR_SET/GET_MPX_BOUNDS_TABLE, to update the kernel's
>> copy. No fpu magic needed.
>>
>> This has an added benefit: CRIU will need updating for MPX, and
>> they'll appreciate hav
On 06/23/2014 03:00 PM, Andy Lutomirski wrote:
> Hmm. How about PR_SET/GET_MPX_BOUNDS_TABLE, to update the kernel's
> copy. No fpu magic needed.
>
> This has an added benefit: CRIU will need updating for MPX, and
> they'll appreciate having the required interface already exist.
> (They'll want a
On Jun 23, 2014 1:09 PM, "Dave Hansen" wrote:
>
> On 06/23/2014 01:00 PM, Andy Lutomirski wrote:
> > On 06/18/2014 02:44 AM, Qiaowei Ren wrote:
> >> > This patch adds the PR_MPX_REGISTER and PR_MPX_UNREGISTER prctl()
> >> > commands. These commands can be used to register and unregister MPX
> >> >
On 06/23/2014 01:00 PM, Andy Lutomirski wrote:
> On 06/18/2014 02:44 AM, Qiaowei Ren wrote:
>> > This patch adds the PR_MPX_REGISTER and PR_MPX_UNREGISTER prctl()
>> > commands. These commands can be used to register and unregister MPX
>> > related resource on the x86 platform.
>> >
>> > The base
On 06/18/2014 02:44 AM, Qiaowei Ren wrote:
> This patch adds the PR_MPX_REGISTER and PR_MPX_UNREGISTER prctl()
> commands. These commands can be used to register and unregister MPX
> related resource on the x86 platform.
>
> The base of the bounds directory is set into mm_struct during
> PR_MPX_RE
On 06/18/2014 02:44 AM, Qiaowei Ren wrote:
> +static __user void *task_get_bounds_dir(struct task_struct *tsk)
> +{
> + struct xsave_struct *xsave_buf;
> +
> + fpu_xsave(&tsk->thread.fpu);
> + xsave_buf = &(tsk->thread.fpu.state->xsave);
> + if (!(xsave_buf->bndcsr.cfg_reg_u & MPX_B
This patch adds the PR_MPX_REGISTER and PR_MPX_UNREGISTER prctl()
commands. These commands can be used to register and unregister MPX
related resource on the x86 platform.
The base of the bounds directory is set into mm_struct during
PR_MPX_REGISTER command execution. This member can be used to
ch
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