On Wed, 2017-12-20 at 09:50 -0800, Ram Pai wrote:
> The argument against this patch is -- it should not be baked into
> the ABI as yet, since we do not have clarity on what applications need.
>
> As it stands today the only way to figure out the information from
> userspace is by probing the kern
On Wed, Dec 20, 2017 at 08:34:56AM +1100, Benjamin Herrenschmidt wrote:
> On Mon, 2017-12-18 at 14:28 -0800, Dave Hansen wrote:
> > > We do not have generic support for something like that on ppc.
> > > The kernel looks at the device tree to determine what hardware features
> > > are available. But
On Mon, 2017-12-18 at 14:28 -0800, Dave Hansen wrote:
> > We do not have generic support for something like that on ppc.
> > The kernel looks at the device tree to determine what hardware features
> > are available. But does not have mechanism to tell the hardware to track
> > which of its features
On Tue, Dec 19, 2017 at 09:50:24PM +1100, Michael Ellerman wrote:
> Dave Hansen writes:
>
> > On 11/06/2017 12:57 AM, Ram Pai wrote:
> >> Expose useful information for programs using memory protection keys.
> >> Provide implementation for powerpc and x86.
> >>
> >> On a powerpc system with pkeys
On Tue, Dec 19, 2017 at 09:31:22AM +0100, Gabriel Paubert wrote:
> On Mon, Dec 18, 2017 at 03:15:51PM -0800, Ram Pai wrote:
> > On Mon, Dec 18, 2017 at 02:28:14PM -0800, Dave Hansen wrote:
> > > On 12/18/2017 02:18 PM, Ram Pai wrote:
> > >
snip...
> > > > I think on x86 you look for some hardw
Dave Hansen writes:
> On 11/06/2017 12:57 AM, Ram Pai wrote:
>> Expose useful information for programs using memory protection keys.
>> Provide implementation for powerpc and x86.
>>
>> On a powerpc system with pkeys support, here is what is shown:
>>
>> $ head /sys/kernel/mm/protection_keys/*
On Mon, Dec 18, 2017 at 03:15:51PM -0800, Ram Pai wrote:
> On Mon, Dec 18, 2017 at 02:28:14PM -0800, Dave Hansen wrote:
> > On 12/18/2017 02:18 PM, Ram Pai wrote:
> > > b) minimum number of keys available to the application.
> > > if libraries consumes a few, they could provide a library
> > >
On Mon, Dec 18, 2017 at 02:28:14PM -0800, Dave Hansen wrote:
> On 12/18/2017 02:18 PM, Ram Pai wrote:
> > b) minimum number of keys available to the application.
> > if libraries consumes a few, they could provide a library
> > interface to the application informing the number available to
On 12/18/2017 02:18 PM, Ram Pai wrote:
> b) minimum number of keys available to the application.
> if libraries consumes a few, they could provide a library
> interface to the application informing the number available to
> the application. The library interface can leverage (b)
On Mon, Dec 18, 2017 at 10:54:26AM -0800, Dave Hansen wrote:
> On 11/06/2017 12:57 AM, Ram Pai wrote:
> > Expose useful information for programs using memory protection keys.
> > Provide implementation for powerpc and x86.
> >
> > On a powerpc system with pkeys support, here is what is shown:
> >
On 11/06/2017 12:57 AM, Ram Pai wrote:
> Expose useful information for programs using memory protection keys.
> Provide implementation for powerpc and x86.
>
> On a powerpc system with pkeys support, here is what is shown:
>
> $ head /sys/kernel/mm/protection_keys/*
> ==> /sys/kernel/mm/protectio
From: Thiago Jung Bauermann
Expose useful information for programs using memory protection keys.
Provide implementation for powerpc and x86.
On a powerpc system with pkeys support, here is what is shown:
$ head /sys/kernel/mm/protection_keys/*
==> /sys/kernel/mm/protection_keys/disable_access_s
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