[PATCH] ARM: mm: Enable PXN when running non-LPAE kernel on LPAE

[PATCH] ARM: mm: Enable PXN when running non-LPAE kernel on LPAE

[Ben Hutchings]

On Mon, 2015-12-28 at 19:31 +0900, Jungseung Lee wrote:
> 2015-05-11 23:36 GMT+09:00 Catalin Marinas <catalin.marinas@arm.com>:
> > On Mon, May 11, 2015 at 05:09:35PM +0900, Jungseung Lee wrote:
> > > Hi, Ben.
> > > 
> > > 2014-12-25 2:20 GMT+09:00 Catalin Marinas :
> > > > On Wed, Dec 24, 2014 at 03:54:28PM +0000, Ben Hutchings wrote:
> > > > > The VMSA field of MMFR0 (bottom 4 bits) is incremented for each
> > > > > added feature.??PXN is supported if the value is >= 4 and LPAE
> > > > > is supported if it is >= 5.
> > > > > 
> > > > > In case a kernel with CONFIG_ARM_LPAE disabled is used on a
> > > > > processor that supports LPAE, we can still use PXN in short
> > > > > descriptors.??So check for >= 4 not == 4.
> > > > > 
> > > > > Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
> > > > > Cc: Jungseung Lee <js07.lee@gmail.com>
> > > > > Cc: Catalin Marinas <catalin.marinas@arm.com>
> > > > 
> > > > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> > > 
> > > Is this patch handled?
> > 
> > If it's not in mainline already, than it probably isn't handled.
> > 
> > > or you can send it to Russell's patch system:
> > > http://www.arm.linux.org.uk/developer/patches/
> > 
> > Check mainline first, otherwise please submit it.
> > 
> 
> > --
> > Catalin
> 
> Hi, Ben
> 
> It looks still not submitted yet. Could you send it to Russell's patch
> system?
> http://www.arm.linux.org.uk/developer/patches/
> 

I've never needed to use a web-based system to submit kernel patches
before, and I'm not going to start now. ?Someone else can re-submit
this if they want it.

Ben.

-- 
Ben Hutchings
I'm not a reverse psychological virus.  Please don't copy me into your sig.
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[PATCH] ARM: mm: Enable PXN when running non-LPAE kernel on LPAE

[Vladimir Murzin]

On 28/12/15 22:23, Ben Hutchings wrote:
> On Mon, 2015-12-28 at 19:31 +0900, Jungseung Lee wrote:
>> 2015-05-11 23:36 GMT+09:00 Catalin Marinas <catalin.marinas@arm.com>:
>>> On Mon, May 11, 2015 at 05:09:35PM +0900, Jungseung Lee wrote:
>>>> Hi, Ben.
>>>>
>>>> 2014-12-25 2:20 GMT+09:00 Catalin Marinas :
>>>>> On Wed, Dec 24, 2014 at 03:54:28PM +0000, Ben Hutchings wrote:
>>>>>> The VMSA field of MMFR0 (bottom 4 bits) is incremented for each
>>>>>> added feature.  PXN is supported if the value is >= 4 and LPAE
>>>>>> is supported if it is >= 5.
>>>>>>
>>>>>> In case a kernel with CONFIG_ARM_LPAE disabled is used on a
>>>>>> processor that supports LPAE, we can still use PXN in short
>>>>>> descriptors.  So check for >= 4 not == 4.
>>>>>>
>>>>>> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
>>>>>> Cc: Jungseung Lee <js07.lee@gmail.com>
>>>>>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>>>>>
>>>>> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>>>>
>>>> Is this patch handled?
>>>
>>> If it's not in mainline already, than it probably isn't handled.
>>>
>>>> or you can send it to Russell's patch system:
>>>> http://www.arm.linux.org.uk/developer/patches/
>>>
>>> Check mainline first, otherwise please submit it.
>>>
>>
>>> --
>>> Catalin
>>
>> Hi, Ben
>>
>> It looks still not submitted yet. Could you send it to Russell's patch
>> system?
>> http://www.arm.linux.org.uk/developer/patches/
>>
> 
> I've never needed to use a web-based system to submit kernel patches
> before, and I'm not going to start now.  Someone else can re-submit

You don't have to... I just quote Catalin's recipe [1]

> You can send patches as usual to patches at arm.linux.org.uk, just add
> KernelVersion: v3.?? after the --- line in your patch (maybe this could
> be automate as well but I didn't bother).
> 
> For series, because the arrival order is not guaranteed, I use the git
> alias below to trick it into sleeping 60s between patches:
> 
> ksend-rmk-patch = !git send-email --annotate --no-thread --suppress-cc=all --to-cmd='sleep 60 && echo patches at arm.linux.org.uk "#"'
> 
> For stgit, I have a dedicated template:
> 
> From: %(sender)s
> To: patches at arm.linux.org.uk
> Subject: %(prefix)s%(shortdescr)s
> 
> %(longdescr)s
> PATCH FOLLOWS
> KernelVersion:%(version)s
> %(diff)s
> 
> And there is always git pull request that Russell is happy with.

Does it work for you?

[1] https://lkml.org/lkml/2014/8/22/228

Happy NY
Vladimir

> this if they want it.
> 
> Ben.
> 
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

[PATCH] ARM: mm: Enable PXN when running non-LPAE kernel on LPAE

[Ben Hutchings]

On Tue, 2015-12-29 at 13:48 +0000, Vladimir Murzin wrote:
> On 28/12/15 22:23, Ben Hutchings wrote:
[...]
> > I've never needed to use a web-based system to submit kernel patches
> > before, and I'm not going to start now.??Someone else can re-submit
> 
> You don't have to... I just quote Catalin's recipe [1]
> 
> > You can send patches as usual to patches at arm.linux.org.uk, just add
> > KernelVersion: v3.?? after the --- line in your patch (maybe this could
> > be automate as well but I didn't bother).
> > 
> > For series, because the arrival order is not guaranteed, I use the git
> > alias below to trick it into sleeping 60s between patches:
> > 
> > ksend-rmk-patch = !git send-email --annotate --no-thread --suppress-cc=all --to-cmd='sleep 60 && echo patches at arm.linux.org.uk "#"'
> > 
> > For stgit, I have a dedicated template:
> > 
> > From: %(sender)s
> > To: patches at arm.linux.org.uk
> > Subject: %(prefix)s%(shortdescr)s
> > 
> > %(longdescr)s
> > PATCH FOLLOWS
> > KernelVersion:%(version)s
> > %(diff)s
> > 
> > And there is always git pull request that Russell is happy with.
> 
> Does it work for you?
> 
> [1] https://lkml.org/lkml/2014/8/22/228

Thanks.  Jungseung Lee has already re-submitted this patch, though.

Ben.

-- 
Ben Hutchings
If God had intended Man to program,
we'd have been born with serial I/O ports.
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