* Jeremy Kerr [2019-10-04 11:27:46]:
> Hi Vaidy,
>
> > The current topic is who owns setting up the ATT bits for that piece
> > of memory. It is the kernel today. Kernel decides to set this up as
> > normal memory or I/O memory and sets the bits in page table entry.
> >
> > > Or, what if
On 04/10/2019 12:53, Jordan Niethe wrote:
> kvmhv_switch_to_host() in arch/powerpc/kvm/book3s_hv_rmhandlers.S needs
> to set kvmppc_vcore->in_guest to 0 to signal secondary CPUs to continue.
> This happens after resetting the PCR. Before commit 13c7bb3c57dc
> ("powerpc/64s: Set reserved PCR
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^/\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski
---
arch/Kconfig | 4 ++--
arch/alpha/Kconfig | 2 +-
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^/\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski
---
certs/Kconfig | 14 ++---
init/Kconfig | 28 +-
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^/\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski
---
drivers/acpi/Kconfig | 8 +-
drivers/ata/Kconfig | 12 +--
On Tue, Sep 10, 2019 at 06:04:14AM +, Christophe Leroy wrote:
> When VMAP_STACK is selected, stack cannot be DMA-mapped.
> Therefore, the hash result has to be DMA-mapped in the request
> context and copied into areq->result at completion.
>
> Signed-off-by: Christophe Leroy
> ---
>
On Fri, Oct 04, 2019 at 01:42:36PM +0200, Peter Zijlstra wrote:
> If you can find anything there that isn't right, please explain that in
> detail and we'll need to look hard at fixing _that_.
Also, I can't imagine Nick is happy with 128 CPUs banging on that atomic
counter, esp. since atomics are
On Thu, Oct 03, 2019 at 05:36:31PM -0300, Leonardo Bras wrote:
> > Also, I'm not sure I understand things properly.
> >
> > So serialize_against_pte_lookup() wants to wait for all currently
> > out-standing __find_linux_pte() instances (which are very similar to
> > gup_fast).
> >
> > It seems
On Thu, Oct 03, 2019 at 06:24:07PM -0300, Leonardo Bras wrote:
> Hello Peter, thanks for the feedback!
>
> On Thu, 2019-10-03 at 13:51 +0200, Peter Zijlstra wrote:
> > On Thu, Oct 03, 2019 at 09:11:45AM +0200, Peter Zijlstra wrote:
> > > On Wed, Oct 02, 2019 at 10:33:15PM -0300, Leonardo Bras
On Thu, Oct 03, 2019 at 01:40:38PM -0700, John Hubbard wrote:
> On 10/3/19 4:51 AM, Peter Zijlstra wrote:
> > On Thu, Oct 03, 2019 at 09:11:45AM +0200, Peter Zijlstra wrote:
> >> On Wed, Oct 02, 2019 at 10:33:15PM -0300, Leonardo Bras wrote:
> ...
> >
> > I'm still really confused about this
There are several problems in the error handling in fsl_mqs_probe().
1) "ret" isn't initialized on some paths. GCC has a feature which
warns about uninitialized variables but the code initializes "ret"
to zero at the start of the function so the checking is turned off.
2) "gpr_np" is a
On Fri, Oct 4, 2019 at 7:24 PM kbuild test robot wrote:
>
> Hi Oliver,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on powerpc/next]
> [cannot apply to v5.4-rc1 next-20191004]
> [if your patch is applied to the wrong git tree, please drop us
On 04.10.19 11:03, David Hildenbrand wrote:
> On 04.10.19 11:00, David Hildenbrand wrote:
>> On 03.10.19 18:48, Aneesh Kumar K.V wrote:
>>> On 10/1/19 8:33 PM, David Hildenbrand wrote:
On 01.10.19 16:57, David Hildenbrand wrote:
> On 01.10.19 16:40, David Hildenbrand wrote:
>> From:
Hi Oliver,
I love your patch! Yet something to improve:
[auto build test ERROR on powerpc/next]
[cannot apply to v5.4-rc1 next-20191004]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify
On 04.10.19 11:00, David Hildenbrand wrote:
> On 03.10.19 18:48, Aneesh Kumar K.V wrote:
>> On 10/1/19 8:33 PM, David Hildenbrand wrote:
>>> On 01.10.19 16:57, David Hildenbrand wrote:
On 01.10.19 16:40, David Hildenbrand wrote:
> From: "Aneesh Kumar K.V"
>
> With altmap, all the
On 03.10.19 18:48, Aneesh Kumar K.V wrote:
> On 10/1/19 8:33 PM, David Hildenbrand wrote:
>> On 01.10.19 16:57, David Hildenbrand wrote:
>>> On 01.10.19 16:40, David Hildenbrand wrote:
From: "Aneesh Kumar K.V"
With altmap, all the resource pfns are not initialized. While
Long before we had a generic way for firmware to export memory ranges of
interest we added a special case for the skiboot symbol map. The code is
pretty much identical to the generic export so re-use the code.
Signed-off-by: Oliver O'Halloran
---
arch/powerpc/platforms/powernv/opal.c | 47
Originally we only had a handful of exported memory ranges, but we'd to
export the per-core trace buffers. This results in a lot of files in the
exports directory which is a but unfortunate. We can clean things up a bit
by turning subnodes into subdirectories of the exports directory.
Whether STRICT_MODULE_RWX is enabled by default depends on powerpc
platform - in arch/Kconfig, STRICT_MODULE_RWX depends on
ARCH_OPTIONAL_KERNEL_RWX, which in arch/powerpc/Kconfig is selected if
ARCH_HAS_STRICT_KERNEL_RWX is selected, which is only true with
CONFIG_RELOCATABLE *disabled*.
It's been quite a while since the last iteration, there were a few
things to hunt down and fix.
The first was the way that I was updating PTEs was using set_pte_at()
unsafely - now, each page is updated by clearing -> flushing -> setting.
This should be generic across all MMUs, I know that there
The set_memory_{ro/rw/nx/x}() functions are required for STRICT_MODULE_RWX,
and are generally useful primitives to have. This implementation is
designed to be completely generic across powerpc's many MMUs.
It's possible that this could be optimised to be faster for specific
MMUs, but the focus
With CONFIG_STRICT_KERNEL_RWX=y and CONFIG_KPROBES=y, there will be one
W+X page at boot by default. This can be tested with
CONFIG_PPC_PTDUMP=y and CONFIG_PPC_DEBUG_WX=y set, and checking the
kernel log during boot.
powerpc doesn't implement its own alloc() for kprobes like other
architectures
Very rudimentary, just
echo 1 > [debugfs]/check_wx_pages
and check the kernel log. Useful for testing strict module RWX.
Also fixed a typo.
Signed-off-by: Russell Currey
---
arch/powerpc/mm/ptdump/ptdump.c | 31 +--
1 file changed, 25 insertions(+), 6
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