On Wed, 2019-10-23 at 16:42 +1100, Michael Ellerman wrote:
>
> Right, it seems of_dma_is_coherent() has baked in the assumption that
> devices are non-coherent unless explicitly marked as coherent.
>
> Which is wrong on all or at least most existing powerpc systems
> according to Ben.
This is pr
Hi
>
> On Thu, Oct 17, 2019 at 02:21:08PM +0800, Shengjiu Wang wrote:
> > For P2P output, the output divider should align with the output sample
>
> I think we should avoid "P2P" (or "M2M") keyword in the mainline code as
> we know M2M will never get merged while somebody working with the
> mainl
Russell King - ARM Linux admin writes:
> On Tue, Oct 15, 2019 at 03:12:49PM +0200, Christian Zigotzky wrote:
>> Hello Russell,
>>
>> You asked me about "dma-coherent" in the Cyrus device tree. Unfortunately I
>> don't find the property "dma-coherent" in the dtb source files.
>>
>> Output of "fdt
On Wed, Oct 23, 2019 at 03:17:54PM +1100, Paul Mackerras wrote:
> On Tue, Oct 22, 2019 at 11:59:35AM +0530, Bharata B Rao wrote:
> The mapping of pages in userspace memory, and the mapping of userspace
> memory to guest physical space, are two distinct things. The memslots
> describe the mapping o
On Tue, Oct 22, 2019 at 11:59:35AM +0530, Bharata B Rao wrote:
> On Fri, Oct 18, 2019 at 8:31 AM Paul Mackerras wrote:
> >
> > On Wed, Sep 25, 2019 at 10:36:43AM +0530, Bharata B Rao wrote:
> > > Manage migration of pages betwen normal and secure memory of secure
> > > guest by implementing H_SVM_
Russell Currey writes:
> diff --git a/arch/powerpc/mm/pageattr.c b/arch/powerpc/mm/pageattr.c
> new file mode 100644
> index ..fe3ecbfb8e10
> --- /dev/null
> +++ b/arch/powerpc/mm/pageattr.c
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/*
> + * MMU-generic set_memor
On 22/10/2019 18:18, Rasmus Villemoes wrote:
> -Original Message-
> From: Rasmus Villemoes
> Sent: 2019年10月22日 18:18
> To: Qiang Zhao ; Leo Li
> Cc: Timur Tabi ; Greg Kroah-Hartman
> ; linux-ker...@vger.kernel.org;
> linux-ser...@vger.kernel.org; Jiri Slaby ;
> linuxppc-dev@lists.ozlabs.
When booting under OF the zImage expects the initrd address and size to be
passed to it using registers r3 and r4. SLOF (guest firmware used by QEMU)
currently doesn't do this so the zImage is not aware of the initrd
location. This can result in initrd corruption either though the zImage
extractin
Nayna Jain writes:
> diff --git a/arch/powerpc/kernel/secure_boot.c
> b/arch/powerpc/kernel/secure_boot.c
> index 99bba7915629..9753470ab08a 100644
> --- a/arch/powerpc/kernel/secure_boot.c
> +++ b/arch/powerpc/kernel/secure_boot.c
> @@ -28,3 +39,16 @@ bool is_ppc_secureboot_enabled(void)
>
Nayna Jain writes:
> diff --git a/arch/powerpc/kernel/secure_boot.c
> b/arch/powerpc/kernel/secure_boot.c
> new file mode 100644
> index ..99bba7915629
> --- /dev/null
> +++ b/arch/powerpc/kernel/secure_boot.c
> @@ -0,0 +1,30 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyr
On Mon, 2019-10-21 at 11:34 +0800, Jason Yan wrote:
>
> On 2019/10/10 2:46, Scott Wood wrote:
> > On Wed, 2019-10-09 at 16:41 +0800, Jason Yan wrote:
> > > Hi Scott,
> > >
> > > On 2019/10/9 15:13, Scott Wood wrote:
> > > > On Wed, 2019-10-09 at 14:10 +0800, Jason Yan wrote:
> > > > > Hi Scott,
>
This contains KASLR support for book3e 32-bit.
The following changes since commit 612ee81b9461475b5a5612c2e8d71559dd3c7920:
powerpc/papr_scm: Fix an off-by-one check in papr_scm_meta_{get, set}
(2019-10-10 20:15:53 +1100)
are available in the Git repository at:
git://git.kernel.org/pub/scm
Hi David,
Thanks for tackling this!
On Tue, Oct 22, 2019 at 10:13 AM David Hildenbrand wrote:
>
> This series is based on [2], which should pop up in linux/next soon:
> https://lkml.org/lkml/2019/10/21/1034
>
> This is the result of a recent discussion with Michal ([1], [2]). Right
> now
On 22.10.19 19:55, Matt Sickler wrote:
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to change that.
The pages are obtained via get_user_pages_fast(). I assume, these could be
ZONE_DEVICE pages. Let's just exclude them as well explicitly.
I'm not sure what ZONE_DEVICE pages
>Right now, ZONE_DEVICE memory is always set PG_reserved. We want to change
>that.
>
>The pages are obtained via get_user_pages_fast(). I assume, these could be
>ZONE_DEVICE pages. Let's just exclude them as well explicitly.
I'm not sure what ZONE_DEVICE pages are, but these pages are normal sys
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
Let's make sure that the logic in the function won't change. Once we no
longer set these pages to reserved, we can rework this function to
perform separate checks for ZONE_DEVICE (split from PG_reserved checks).
Cc:
This series is based on [2], which should pop up in linux/next soon:
https://lkml.org/lkml/2019/10/21/1034
This is the result of a recent discussion with Michal ([1], [2]). Right
now we set all pages PG_reserved when initializing hotplugged memmaps. This
includes ZONE_DEVICE memory. In cas
Everything should be prepared to stop setting pages PG_reserved when
initializing the memmap on memory hotplug. Most importantly, we
stop marking ZONE_DEVICE pages PG_reserved.
a) We made sure that any code that relied on PG_reserved to detect
ZONE_DEVICE memory will no longer rely on PG_reserv
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
We could explicitly check for is_zone_device_page(page). But looking at
the pfn_valid() check, it seems safer to just use pfn_to_online_page()
here, that will skip all ZONE_DEVICE pages right away.
Cc: Dave Hansen
C
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
We could explicitly check for is_zone_device_page(page). But looking at
the pfn_valid() check, it seems safer to just use pfn_to_online_page()
here, that will skip all ZONE_DEVICE pages right away.
Cc: Benjamin Herre
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
The pages are obtained via get_user_pages_fast(). I assume, these
could be ZONE_DEVICE pages. Let's just exclude them as well explicitly.
Cc: Rob Springer
Cc: Todd Poynor
Cc: Ben Chan
Cc: Greg Kroah-Hartman
Signe
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
We could explicitly check for is_zone_device_page(page). But looking at
the pfn_valid() check, it seems safer to just use pfn_to_online_page()
here, that will skip all ZONE_DEVICE pages right away.
Cc: Benjamin Herre
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
KVM has this weird use case that you can map anything from /dev/mem
into the guest. pfn_valid() is not a reliable check whether the memmap
was initialized and can be touched. pfn_to_online_page() makes sure
that we ha
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
KVM has this weird use case that you can map anything from /dev/mem
into the guest. pfn_valid() is not a reliable check whether the memmap
was initialized and can be touched. pfn_to_online_page() makes sure
that we ha
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
The pages are obtained via get_user_pages_fast(). I assume, these
could be ZONE_DEVICE pages. Let's just exclude them as well explicitly.
Cc: Greg Kroah-Hartman
Cc: Vandana BN
Cc: "Simon Sandström"
Cc: Dan Carpent
Our onlining/offlining code is unnecessarily complicated. Only memory
blocks added during boot can have holes. Hotplugged memory never has
holes. That memory is already online.
When we stop allowing to offline memory blocks with holes, we implicitly
stop to online memory blocks with holes.
This a
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
KVM has this weird use case that you can map anything from /dev/mem
into the guest. pfn_valid() is not a reliable check whether the memmap
was initialized and can be touched. pfn_to_online_page() makes sure
that we ha
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.
KVM has this weird use case that you can map anything from /dev/mem
into the guest. pfn_valid() is not a reliable check whether the memmap
was initialized and can be touched. pfn_to_online_page() makes sure
that we ha
On 10/18/2019 12:52 PM, Rasmus Villemoes wrote:
There have been several attempts in the past few years to allow
building the QUICC engine drivers for platforms other than PPC. This
is (the beginning of) yet another attempt. I hope I can get someone to
pick up these relatively trivial patches (
On 10/18/2019 12:52 PM, Rasmus Villemoes wrote:
In preparation for allowing to build QE support for architectures
other than PPC, replace the ppc-specific io accessors. Done via
This patch is not transparent in terms of performance, functions get
changed significantly.
Before the patch:
Le 22/10/2019 à 11:01, Christophe Leroy a écrit :
Le 21/10/2019 à 23:29, Thomas Gleixner a écrit :
On Mon, 21 Oct 2019, Christophe Leroy wrote:
This is a tentative to switch powerpc/32 vdso to generic C
implementation.
It will likely not work on 64 bits or even build properly at the mome
Commit e78a7614f3876 ("idle: Prevent late-arriving interrupts from
disrupting offline") changes arch_cpu_idle_dead to be called with
interrupts disabled, which triggers the WARN in pnv_smp_cpu_kill_self.
Fix this by fixing up irq_happened after hard disabling, rather than
requiring there are no pe
Allow copying partial data to user space. So that opal-prd daemon
can read message size, reallocate memory and make read call to
get rest of the data.
Cc: Jeremy Kerr
Cc: Vaidyanathan Srinivasan
Signed-off-by: Vasant Hegde
---
arch/powerpc/platforms/powernv/opal-prd.c | 27
On 10/22/2019 12:41 PM, Christophe Leroy wrote:
>
>
> On 10/21/2019 02:42 AM, Anshuman Khandual wrote:
>> This adds tests which will validate architecture page table helpers and
>> other accessors in their compliance with expected generic MM semantics.
>> This will help various architectures in
From: "Gautham R. Shenoy"
Currently on PSeries Linux guests, the offlined CPU can be put to one
of the following two states:
- Long term processor cede (also called extended cede)
- Returned to the hypervisor via RTAS "stop-self" call.
This is controlled by the kernel boot parameter "cede_
From: "Gautham R. Shenoy"
This is the v2 of the fix to change the default behaviour of cede_offline.
The previous version can be found here: https://lkml.org/lkml/2019/9/12/222
The main change from v1 is that the patch2 to create a sysfs file to
report and control the value of cede_offline_enabl
On 22/10/2019 04.24, Qiang Zhao wrote:
> On Mon, Oct 22, 2019 at 6:11 AM Leo Li wrote
>> Right. I'm really interested in getting this applied to my tree and make it
>> upstream. Zhao Qiang, can you help to review Rasmus's patches and
>> comment?
>
> As you know, I maintained a similar patchset
On 22/10/2019 00.11, Li Yang wrote:
> On Mon, Oct 21, 2019 at 3:46 AM Rasmus Villemoes
> wrote:
>>
>>> Can you try the 4.14 branch from a newer LSDK release? LS1021a should
>>> be supported platform on LSDK. If it is broken, something is wrong.
>>
>> What newer release? LSDK-18.06-V4.14 is the
On Tue, Oct 22, 2019 at 9:51 AM Ran Wang wrote:
>
> Some user might want to go through all registered wakeup sources
> and doing things accordingly. For example, SoC PM driver might need to
> do HW programming to prevent powering down specific IP which wakeup
> source depending on. So add this API
On Tue, Oct 22, 2019 at 9:52 AM Ran Wang wrote:
>
> The NXP's QorIQ Processors based on ARM Core have RCPM module
> (Run Control and Power Management), which performs system level
> tasks associated with power management such as wakeup source control.
>
> This driver depends on PM wakeup source fr
Le 21/10/2019 à 23:29, Thomas Gleixner a écrit :
On Mon, 21 Oct 2019, Christophe Leroy wrote:
This is a tentative to switch powerpc/32 vdso to generic C implementation.
It will likely not work on 64 bits or even build properly at the moment.
powerpc is a bit special for VDSO as well as syst
On Mon, Oct 21, 2019 at 10:15:29PM -0700, Nathan Chancellor wrote:
> On Fri, Oct 18, 2019 at 03:02:10PM -0500, Segher Boessenkool wrote:
> > I think the proper solution is for the kernel to *do* use -ffreestanding,
> > and then somehow tell the kernel that memcpy etc. are the standard
> > functions
pseries.c implements the guest-specific callbacks for the backend API.
The hypervisor calls provide an interface to configure and interact with
OpenCAPI devices. It matches the last version of the 'PAPR changes'
document.
The following hcalls are supported:
H_OCXL_CONFIG_ADAPTER Used to configu
This series adds support for an 0penCAPI device in a QEMU guest.
It builds on top of the existing ocxl driver +
http://patchwork.ozlabs.org/patch/1177999/
The ocxl module registers either a pci driver or a platform driver, based on
the environment (bare-metal (powernv) or pseries).
Roughly 4/5 o
Fix up the pci config size of the OpenCAPI PCIe devices in the pseries
environment.
Most of OpenCAPI PCIe devices have 4096 bytes of configuration space.
Signed-off-by: Christophe Lombard
---
arch/powerpc/platforms/pseries/pci.c | 9 +
1 file changed, 9 insertions(+)
diff --git a/arch/p
The backend API (in ocxl.h) lists some low-level functions whose
implementation is different on bare-metal and in a guest. Each
environment implements its own functions, and the common code uses
them through function pointers, defined in ocxl_backend_ops
A new powernv.c file is created to call the
By default, QorIQ SoC's RCPM register block is Big Endian. But
there are some exceptions, such as LS1088A and LS2088A, are
Little Endian. So add this optional property to help identify
them.
Actually LS2021A and other Layerscapes won't totally follow Chassis
2.1, so separate them from powerpc SoC.
The NXP's QorIQ Processors based on ARM Core have RCPM module
(Run Control and Power Management), which performs system level
tasks associated with power management such as wakeup source control.
This driver depends on PM wakeup source framework which help to
collect wake information.
Signed-off-
Some user might want to go through all registered wakeup sources
and doing things accordingly. For example, SoC PM driver might need to
do HW programming to prevent powering down specific IP which wakeup
source depending on. So add this API to help walk through all registered
wakeup source objects
On 10/21/2019 02:42 AM, Anshuman Khandual wrote:
This adds tests which will validate architecture page table helpers and
other accessors in their compliance with expected generic MM semantics.
This will help various architectures in validating changes to existing
page table helpers or addition
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