On Mon, 2016-04-11 at 19:12 +0530, Aneesh Kumar K.V wrote:
> Michael Ellerman writes:
> >
> > In this case it *looks* like we have a giant hole in the mm handling for
> > CAPI
> > contexts, which would let userspace create mappings of kernel memory with
> > _PAGE_USER set. I think I agree with I
Michael Ellerman writes:
> On Mon, 2016-04-11 at 10:01 +0530, Aneesh Kumar K.V wrote:
>> Michael Ellerman writes:
>> > On Mon, 2016-04-11 at 14:10 +1000, Andrew Donnellan wrote:
>> > > On 29/03/16 00:42, Aneesh Kumar K.V wrote:
>> > > > I noticed this when doing radix support and have a variant
On Mon, 2016-04-11 at 10:01 +0530, Aneesh Kumar K.V wrote:
> Michael Ellerman writes:
> > On Mon, 2016-04-11 at 14:10 +1000, Andrew Donnellan wrote:
> > > On 29/03/16 00:42, Aneesh Kumar K.V wrote:
> > > > I noticed this when doing radix support and have a variant posted at
> > > >
> > > > https:
Michael Ellerman writes:
> On Mon, 2016-04-11 at 14:10 +1000, Andrew Donnellan wrote:
>> On 29/03/16 00:42, Aneesh Kumar K.V wrote:
>> > I noticed this when doing radix support and have a variant posted at
>> >
>> > https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-March/141036.html
>>
>> I'
On Mon, 2016-04-11 at 14:10 +1000, Andrew Donnellan wrote:
> On 29/03/16 00:42, Aneesh Kumar K.V wrote:
> > I noticed this when doing radix support and have a variant posted at
> >
> > https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-March/141036.html
>
> I'm happy for this to be fixed in you
On 29/03/16 00:42, Aneesh Kumar K.V wrote:
I noticed this when doing radix support and have a variant posted at
https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-March/141036.html
I'm happy for this to be fixed in your radix series.
--
Andrew Donnellan OzLabs, ADL Canberra
and
"Aneesh Kumar K.V" writes:
> [ text/plain ]
> Michael Ellerman writes:
>
>> [ text/plain ]
>> On Fri, 2016-18-03 at 04:01:21 UTC, Andrew Donnellan wrote:
>>> When handling page faults, cxl_handle_page_fault() checks whether the page
>>> should be accessible by userspace and have its _PAGE_USER a
Michael Ellerman writes:
> [ text/plain ]
> On Fri, 2016-18-03 at 04:01:21 UTC, Andrew Donnellan wrote:
>> When handling page faults, cxl_handle_page_fault() checks whether the page
>> should be accessible by userspace and have its _PAGE_USER access bit set.
>> _PAGE_USER should be set if the con
Excerpts from Michael Ellerman's message of 2016-03-25 05:01:38 -0500:
> I think you can (should) use is_kernel_addr() for the DAR check.
>
> I'm also slightly worried by that logic in the case of a non-kernel context.
>
> ie. if ctx->kernel is false, we get:
>
> if (true || !is_kernel_addr(
On Fri, 2016-18-03 at 04:01:21 UTC, Andrew Donnellan wrote:
> When handling page faults, cxl_handle_page_fault() checks whether the page
> should be accessible by userspace and have its _PAGE_USER access bit set.
> _PAGE_USER should be set if the context's kernel flag isn't set, or if the
> page fa
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