Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-12 Thread Ram Pai
On Fri, Nov 10, 2017 at 07:10:31PM +0100, Christophe LEROY wrote: > Hi > > Le 06/11/2017 à 09:56, Ram Pai a écrit : > >Memory protection keys enable applications to protect its > >address space from inadvertent access from or corruption > >by itself. > > > >These patches along with the pte-bit fre

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-10 Thread Christophe LEROY
Hi Le 06/11/2017 à 09:56, Ram Pai a écrit : Memory protection keys enable applications to protect its address space from inadvertent access from or corruption by itself. These patches along with the pte-bit freeing patch series enables the protection key feature on powerpc; 4k and 64k hashpage

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-09 Thread Ram Pai
On Mon, Nov 06, 2017 at 05:22:18PM -0800, Ram Pai wrote: > On Mon, Nov 06, 2017 at 10:28:41PM +0100, Florian Weimer wrote: > > * Ram Pai: > > > > > Testing: > > > --- > > > This patch series has passed all the protection key > > > tests available in the selftest directory.The > > > tests are u

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-07 Thread Ram Pai
On Tue, Nov 07, 2017 at 02:47:10PM -0800, Dave Hansen wrote: > On 11/07/2017 02:39 PM, Ram Pai wrote: > > > > As per the current semantics of sys_pkey_free(); the way I understand it, > > the calling thread is saying disassociate me from this key. > > No. It is saying: "this *process* no longer

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-07 Thread Dave Hansen
On 11/07/2017 02:39 PM, Ram Pai wrote: > > As per the current semantics of sys_pkey_free(); the way I understand it, > the calling thread is saying disassociate me from this key. No. It is saying: "this *process* no longer has any uses of this key, it can be reused". -- To unsubscribe from this

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-07 Thread Ram Pai
On Tue, Nov 07, 2017 at 08:32:16AM +0100, Florian Weimer wrote: > * Ram Pai: > > > On Mon, Nov 06, 2017 at 10:28:41PM +0100, Florian Weimer wrote: > >> * Ram Pai: > >> > >> > Testing: > >> > --- > >> > This patch series has passed all the protection key > >> > tests available in the selftest

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-06 Thread Florian Weimer
* Ram Pai: > On Mon, Nov 06, 2017 at 10:28:41PM +0100, Florian Weimer wrote: >> * Ram Pai: >> >> > Testing: >> > --- >> > This patch series has passed all the protection key >> > tests available in the selftest directory.The >> > tests are updated to work on both x86 and powerpc. >> > The sel

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-06 Thread Ram Pai
On Mon, Nov 06, 2017 at 10:28:41PM +0100, Florian Weimer wrote: > * Ram Pai: > > > Testing: > > --- > > This patch series has passed all the protection key > > tests available in the selftest directory.The > > tests are updated to work on both x86 and powerpc. > > The selftests have passed on

Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-06 Thread Florian Weimer
* Ram Pai: > Testing: > --- > This patch series has passed all the protection key > tests available in the selftest directory.The > tests are updated to work on both x86 and powerpc. > The selftests have passed on x86 and powerpc hardware. How do you deal with the key reuse problem? Is it th

[PATCH v9 00/51] powerpc, mm: Memory Protection Keys

2017-11-06 Thread Ram Pai
Memory protection keys enable applications to protect its address space from inadvertent access from or corruption by itself. These patches along with the pte-bit freeing patch series enables the protection key feature on powerpc; 4k and 64k hashpage kernels. It also changes the generic and x86 co